added force and speed options and support for KNK Zing plotters

(bzr r12858)

7 files changed, 253 insertions, 166 deletions

diff --git a/share/extensions/hpgl_decoder.py b/share/extensions/hpgl_decoder.py
index 96571df94..2401a5612 100644
--- a/share/extensions/hpgl_decoder.py
+++ b/share/extensions/hpgl_decoder.py
@@ -19,8 +19,8 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 '''
 
 # standard libraries
-from StringIO import StringIO
 import math
+from StringIO import StringIO
 # local library
 import inkex
 
@@ -60,8 +60,8 @@ class hpglDecoder:
         path = ''
         for i, command in enumerate(hpglData):
             if command.strip() != '':
-                if command[:2] == 'IN':
-                    # if Initialize command, ignore
+                if command[:2] == 'IN' or command[:2] == 'FS' or command[:2] == 'VS':
+                    # if Initialize, force or speed command, ignore
                     pass
                 elif command[:2] == 'SP':
                     # if Select Pen command
@@ -71,7 +71,7 @@ class hpglDecoder:
                     # if Pen Up command
                     if ' L ' in path:
                         self.addPathToLayer(path, actualLayer)
-                    if self.options.showMovements and i != len(hpglData) - 1:
+                    if self.options.showMovements and oldCoordinates != self.getParameters(command[2:]):
                         path = 'M %f,%f' % oldCoordinates
                         path += ' L %f,%f' % self.getParameters(command[2:])
                         self.addPathToLayer(path, 0)
@@ -83,14 +83,14 @@ class hpglDecoder:
                     if parameterString.strip() != '':
                         parameterString = parameterString.replace(';', '').strip()
                         parameter = parameterString.split(',')
-                        oldCoordinates = (float(parameter[-2]) / self.scaleX, self.options.docHeight - float(parameter[-1]) / self.scaleX)
                         for i, param in enumerate(parameter):
                             if i % 2 == 0:
                                 parameter[i] = str(float(param) / self.scaleX)
                             else:
-                                parameter[i] = str(self.options.docHeight - float(param) / self.scaleY)
+                                parameter[i] = str(self.options.docHeight - (float(param) / self.scaleY))
                         parameterString = ','.join(parameter)
                         path += ' L %s' % parameterString
+                        oldCoordinates = (float(parameter[-2]), float(parameter[-1]))
                 else:
                     self.warning = 'UNKNOWN_COMMANDS'
         if ' L ' in path:
@@ -98,8 +98,11 @@ class hpglDecoder:
         return (self.doc, self.warning)
 
     def createLayer(self, layerNumber):
-        self.layers[layerNumber] = inkex.etree.SubElement(self.doc.getroot(), 'g',
-            {inkex.addNS('groupmode', 'inkscape'): 'layer', inkex.addNS('label', 'inkscape'): self.textPenNumber + layerNumber})
+        try:
+            self.layers[layerNumber]
+        except KeyError:
+            self.layers[layerNumber] = inkex.etree.SubElement(self.doc.getroot(), 'g',
+                {inkex.addNS('groupmode', 'inkscape'): 'layer', inkex.addNS('label', 'inkscape'): self.textPenNumber + layerNumber})
 
     def addPathToLayer(self, path, layerNumber):
         lineColor = '000000'
@@ -116,6 +119,6 @@ class hpglDecoder:
         # split parameter
         parameter = parameterString.split(',')
         # convert to svg coordinate system and return
-        return (float(parameter[0]) / self.scaleX, self.options.docHeight - float(parameter[1]) / self.scaleY)
+        return (float(parameter[0]) / self.scaleX, self.options.docHeight - (float(parameter[1]) / self.scaleY))
 
 # vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 fileencoding=utf-8 textwidth=99
\ No newline at end of file
diff --git a/share/extensions/hpgl_encoder.py b/share/extensions/hpgl_encoder.py
index ba9412bde..db8a0f0a5 100644
--- a/share/extensions/hpgl_encoder.py
+++ b/share/extensions/hpgl_encoder.py
@@ -21,6 +21,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
 # standard libraries
 import math
+import re
 import string
 # local libraries
 import bezmisc
@@ -35,12 +36,19 @@ import simpletransform
 class hpglEncoder:
     PI = math.pi
     TWO_PI = PI * 2
+    # a dictionary of arbitrary unit to user unit conversion factors
+    # in = Inch; pt = PostScript Point; px = Pixel; mm = Millimeter; cm = Centimeter;
+    # km = Kilometer; pc = PostScript Pica; yd = Yard; ft = Feet; m = Meter
+    __USER_UNIT_CONVERSION = {'in':90.0, 'pt':1.25, 'px':1, 'mm':3.5433070866, 'cm':35.433070866,
+                'km':3543307.0866, 'pc':15.0, 'yd':3240 , 'ft':1080, 'm':3543.3070866}
 
     def __init__(self, effect):
         ''' options:
                 "resolutionX":float
                 "resolutionY":float
                 "pen":int
+                "force:int
+                "speed:int
                 "orientation":string // "0", "90", "-90", "180"
                 "mirrorX":bool
                 "mirrorY":bool
@@ -53,22 +61,28 @@ class hpglEncoder:
                 "precut":bool
                 "offsetX":float
                 "offsetY":float
+                "debug":bool
         '''
         self.doc = effect.document.getroot()
         self.options = effect.options
+        self.documentUnit = self.doc.xpath('//sodipodi:namedview/@inkscape:document-units', namespaces=inkex.NSS)
+        if self.documentUnit:
+            self.documentUnit = self.documentUnit[0]
+        else:
+            self.documentUnit = 'px'
         self.divergenceX = 'False'
         self.divergenceY = 'False'
         self.sizeX = 'False'
         self.sizeY = 'False'
         self.dryRun = True
         self.lastPoint = [0, 0, 0]
-        self.scaleX = self.options.resolutionX / effect.unittouu("1.0in") # dots per inch to dots per user unit
-        self.scaleY = self.options.resolutionY / effect.unittouu("1.0in") # dots per inch to dots per user unit
+        self.scaleX = self.options.resolutionX / self.unitToUserUnit("1.0in") # dots per inch to dots per user unit
+        self.scaleY = self.options.resolutionY / self.unitToUserUnit("1.0in") # dots per inch to dots per user unit
         scaleXY = (self.scaleX + self.scaleY) / 2
-        self.offsetX = effect.unittouu(str(self.options.offsetX) + "mm") * self.scaleX # mm to dots (plotter coordinate system)
-        self.offsetY = effect.unittouu(str(self.options.offsetY) + "mm") * self.scaleY # mm to dots
-        self.overcut = effect.unittouu(str(self.options.overcut) + "mm") * scaleXY # mm to dots
-        self.toolOffset = effect.unittouu(str(self.options.toolOffset) + "mm") * scaleXY # mm to dots
+        self.offsetX = self.unitToUserUnit(str(self.options.offsetX) + "mm") * self.scaleX # mm to dots (plotter coordinate system)
+        self.offsetY = self.unitToUserUnit(str(self.options.offsetY) + "mm") * self.scaleY # mm to dots
+        self.overcut = self.unitToUserUnit(str(self.options.overcut) + "mm") * scaleXY # mm to dots
+        self.toolOffset = self.unitToUserUnit(str(self.options.toolOffset) + "mm") * scaleXY # mm to dots
         self.flat = self.options.flat / (1016 / ((self.options.resolutionX + self.options.resolutionY) / 2)) # scale flatness to resolution
         self.toolOffsetFlat = self.flat / self.toolOffset * 4.5 # scale flatness to offset
         self.mirrorX = 1.0
@@ -77,15 +91,25 @@ class hpglEncoder:
         self.mirrorY = -1.0
         if self.options.mirrorY:
             self.mirrorY = 1.0
+        if self.options.debug:
+            self.debugValues = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
         # process viewBox attribute to correct page scaling
         viewBox = self.doc.get('viewBox')
         self.viewBoxTransformX = 1
         self.viewBoxTransformY = 1
+        if self.options.debug:
+            self.debugValues[0] = self.unitToUserUnit(self.doc.get('width'), True)
+            self.debugValues[1] = self.unitToUserUnit(self.doc.get('height'), True)
         if viewBox:
             viewBox = string.split(viewBox, ' ')
             if viewBox[2] and viewBox[3]:
-                self.viewBoxTransformX = effect.unittouu(self.doc.get('width')) / effect.unittouu(viewBox[2])
-                self.viewBoxTransformY = effect.unittouu(self.doc.get('height')) / effect.unittouu(viewBox[3])
+                viewBox[0] = viewBox[2]
+                viewBox[1] = viewBox[3]
+            if self.options.debug:
+                self.debugValues[2] = self.unitToUserUnit(viewBox[0])
+                self.debugValues[3] = self.unitToUserUnit(viewBox[1])
+            self.viewBoxTransformX = self.unitToUserUnit(self.doc.get('width'), True) / self.unitToUserUnit(viewBox[0])
+            self.viewBoxTransformY = self.unitToUserUnit(self.doc.get('height'), True) / self.unitToUserUnit(viewBox[1])
 
     def getHpgl(self):
         # dryRun to find edges
@@ -97,9 +121,14 @@ class hpglEncoder:
             raise Exception('NO_PATHS')
         # live run
         self.dryRun = False
+        if self.options.debug:
+            self.debugValues[4] = self.sizeX - self.divergenceX
+            self.debugValues[5] = self.sizeY - self.divergenceY
+            self.debugValues[6] = self.unitToUserUnit(str(self.debugValues[4] / self.scaleX))
+            self.debugValues[7] = self.unitToUserUnit(str(self.debugValues[5] / self.scaleY))
         if self.options.center:
-            self.divergenceX += (self.sizeX - self.divergenceX) / 2
-            self.divergenceY += (self.sizeY - self.divergenceY) / 2
+            self.divergenceX += self.sizeX - self.divergenceX / 2
+            self.divergenceY += self.sizeY - self.divergenceY / 2
         elif self.options.useToolOffset:
             self.offsetX += self.toolOffset
             self.offsetY += self.toolOffset
@@ -109,6 +138,10 @@ class hpglEncoder:
         self.vData = [['', -1.0, -1.0], ['', -1.0, -1.0], ['', -1.0, -1.0], ['', -1.0, -1.0]]
         # store first hpgl commands
         self.hpgl = 'IN;SP%d' % self.options.pen
+        if self.options.force > 0:
+            self.hpgl += ';FS%d' % self.options.force
+        if self.options.speed > 0:
+            self.hpgl += ';VS%d' % self.options.speed
         # add precut
         if self.options.useToolOffset and self.options.precut:
             self.processOffset('PU', 0, 0)
@@ -124,6 +157,18 @@ class hpglEncoder:
         else:
             return self.hpgl, ""
 
+    def unitToUserUnit(self, string, isPixels=False):
+        '''Returns userunits given a string representation of units in another system'''
+        matches = re.match('^(.*?)(in|pt|px|mm|cm|km|pc|yd|ft|m)?$', string.strip())
+        value = float(matches.group(1))
+        unit = matches.group(2)
+        if unit is None:
+            if isPixels:
+                unit = "px"
+            else:
+                unit = self.documentUnit
+        return value * self.__USER_UNIT_CONVERSION[unit] / self.__USER_UNIT_CONVERSION[self.documentUnit]
+
     def processGroups(self, doc, groupmat):
         # flatten groups to avoid recursion
         paths = []
diff --git a/share/extensions/hpgl_input.inx b/share/extensions/hpgl_input.inx
index 15b91ae98..aba7a9308 100644
--- a/share/extensions/hpgl_input.inx
+++ b/share/extensions/hpgl_input.inx
@@ -7,9 +7,9 @@
     <dependency type="executable" location="extensions">inkex.py</dependency>
     <_param name="introduction" type="description">Please note that you can only open HPGL files written by Inkscape, to open other HPGL files please change their file extension to .plt, make sure you have UniConverter installed and open them again.</_param>
     <param name="space" type="description">&#xa0;</param>
-    <param name="resolutionX" type="float" min="1.0" max="4096.0" precision="1" _gui-text="Resolution X (dpi)" _gui-description="The amount of steps in one inch on the X axis (Default: 1016.0)">1016.0</param>
-    <param name="resolutionY" type="float" min="1.0" max="4096.0" precision="1" _gui-text="Resolution Y (dpi)" _gui-description="The amount of steps in one inch on the Y axis (Default: 1016.0)">1016.0</param>
-    <param name="showMovements" type="boolean" _gui-text="Show movements between paths" _gui-description="Check this to show movements between paths (Default: Unchecked)">false</param>
+    <param name="resolutionX" type="float" min="1.0" max="4096.0" precision="1" _gui-text="Resolution X (dpi)" _gui-description="The amount of steps in one inch on the X axis. (Default: 1016.0)">1016.0</param>
+    <param name="resolutionY" type="float" min="1.0" max="4096.0" precision="1" _gui-text="Resolution Y (dpi)" _gui-description="The amount of steps in one inch on the Y axis. (Default: 1016.0)">1016.0</param>
+    <param name="showMovements" type="boolean" _gui-text="Show movements between paths" _gui-description="Check this to show movements between paths. (Default: Unchecked)">false</param>
     <input>
         <extension>.hpgl</extension>
         <mimetype>image/hpgl</mimetype>
diff --git a/share/extensions/hpgl_output.inx b/share/extensions/hpgl_output.inx
index c51215b4c..a0ba6e364 100644
--- a/share/extensions/hpgl_output.inx
+++ b/share/extensions/hpgl_output.inx
@@ -9,35 +9,38 @@
     <_param name="introduction" type="description">Please make sure that all objects you want to save are converted to paths. The drawing will be automatically aligned to the zero point. Please use the plotter extension (Extensions menu) to plot directly on a plotter.</_param>
     <param name="tab" type="notebook">
         <page name="plotter" _gui-text="Plotter Settings">
-            <param name="pen" type="int" min="0" max="10" _gui-text="Pen number" _gui-description="The number of the pen (tool) to use, on most plotters 1 (Standard: '1')">1</param>
-            <param name="resolutionX" type="float" min="1.0" max="4096.0" precision="1" _gui-text="Resolution X (dpi)" _gui-description="The amount of steps the cutter moves if it moves for 1 inch on the X axis - Try different settings to find the one that fits your plotter (Default: 1016.0)">1016.0</param>
-            <param name="resolutionY" type="float" min="1.0" max="4096.0" precision="1" _gui-text="Resolution Y (dpi)" _gui-description="The amount of steps the cutter moves if it moves for 1 inch on the Y axis - Try different settings to find the one that fits your plotter (Default: 1016.0)">1016.0</param>
-            <param name="mirrorX" type="boolean" _gui-text="Mirror X-axis" _gui-description="Check this to mirror the X axis - Try different settings to find the one that fits your plotter (Default: Unchecked)">false</param>
-            <param name="mirrorY" type="boolean" _gui-text="Mirror Y-axis" _gui-description="Check this to mirror the Y axis - Try different settings to find the one that fits your plotter (Default: Unchecked)">false</param>
-            <param name="orientation" type="optiongroup" appearance="minimal" _gui-text="Rotation (Clockwise)" _gui-description="Rotation of the drawing - Try different settings to find the one that fits your plotter (Default: 0°)">
+            <param name="resolutionX" type="float" min="1.0" max="4096.0" precision="1" _gui-text="Resolution X (dpi)" _gui-description="The amount of steps the cutter moves if it moves for 1 inch on the X axis. (Default: 1016.0)">1016.0</param>
+            <param name="resolutionY" type="float" min="1.0" max="4096.0" precision="1" _gui-text="Resolution Y (dpi)" _gui-description="The amount of steps the cutter moves if it moves for 1 inch on the Y axis. (Default: 1016.0)">1016.0</param>
+            <param name="pen" type="int" min="0" max="99" _gui-text="Pen number" _gui-description="The number of the pen (tool) to use. (Standard: '1')">1</param>
+            <param name="force" type="int" min="0" max="1000" _gui-text="Pen force (g)" _gui-description="The amount of force pushing down the pen in grams, set to 0 to omit command. Most plotters ignore this command. (Default: 24)">24</param>
+            <param name="speed" type="int" min="0" max="1000" _gui-text="Pen speed (cm/s)" _gui-description="The speed the pen will move with in centimetres per second, set to 0 to omit command. Most plotters ignore this command. (Default: 20)">20</param>
+            <param name="orientation" type="optiongroup" appearance="minimal" _gui-text="Rotation (Clockwise)" _gui-description="Rotation of the plot. (Default: 0°)">
                 <option value="0">0°</option>
                 <option value="90">90°</option>
                 <option value="180">180°</option>
                 <option value="270">270°</option>
             </param>
-            <param name="center" type="boolean" _gui-text="Center zero point" _gui-description="Check this if your plotter uses a centered zero point - Try different settings to find the one that fits your plotter (Default: Unchecked)">false</param>
+            <param name="mirrorX" type="boolean" _gui-text="Mirror X axis" _gui-description="Check this to mirror the X axis. (Default: Unchecked)">false</param>
+            <param name="mirrorY" type="boolean" _gui-text="Mirror Y axis" _gui-description="Check this to mirror the Y axis. (Default: Unchecked)">false</param>
+            <param name="center" type="boolean" _gui-text="Center zero point" _gui-description="Check this if your plotter uses a centered zero point. (Default: Unchecked)">false</param>
         </page>
         <page name="overcutToolOffset" _gui-text="Overcut &#x26; Tool Offset">
-            <param name="useOvercut" type="boolean" _gui-text="Use overcut" _gui-description="Check this to use the overcut, if not checked the 'Overcut' parameter is unused (Default: Checked)">true</param>
-            <param name="overcut" type="float" min="0.0" max="100.0" precision="2" _gui-text="Overcut (mm)" _gui-description="The distance in mm that will be cut over the starting point of the path to prevent open paths (Default: 1.00)">1.00</param>
+            <param name="useOvercut" type="boolean" _gui-text="Use overcut" _gui-description="Check this to use overcut, if not checked the 'Overcut' parameter is unused. (Default: Checked)">true</param>
+            <param name="overcut" type="float" min="0.0" max="100.0" precision="2" _gui-text="Overcut (mm)" _gui-description="The distance in mm that will be cut over the starting point of the path to prevent open paths. (Default: 1.00)">1.00</param>
             <param name="space" type="description">&#xa0;</param>
-            <param name="useToolOffset" type="boolean" _gui-text="Use tool offset correction" _gui-description="Check this to use the tool offset correction, if not checked the 'Tool offset' and 'Precut' parameters are unused (Default: Checked)">true</param>
-            <param name="toolOffset" type="float" min="0.0" max="20.0" precision="2" _gui-text="Tool offset (mm)" _gui-description="The offset from the tool tip to the tool axis in mm (Default: 0.25)">0.25</param>
-            <param name="precut" type="boolean" _gui-text="Use precut" _gui-description="Check this to cut a small line before the real drawing to align the tool orientation for the first cut (Default: Checked)">true</param>
+            <param name="useToolOffset" type="boolean" _gui-text="Use tool offset correction" _gui-description="Check this to use the tool offset correction, if not checked the 'Tool offset' and 'Precut' parameters are unused. (Default: Checked)">true</param>
+            <param name="toolOffset" type="float" min="0.0" max="20.0" precision="2" _gui-text="Tool offset (mm)" _gui-description="The offset from the tool tip to the tool axis in mm. (Default: 0.25)">0.25</param>
+            <param name="precut" type="boolean" _gui-text="Use precut" _gui-description="Check this to plot a small line before the real plot to align the tool orientation for the first real plot. (Default: Checked)">true</param>
             <param name="space" type="description">&#xa0;</param>
-            <_param name="offsetNote" type="description">Please note that using the tool offset correction will move your plot away from the zero point by the length in mm specified by the tool offset.</_param>
+            <_param name="offsetNote" type="description">Please note that using the tool offset correction will move your plot away from the zero point by one tool offset length.</_param>
         </page>
         <page name="misc" _gui-text="Miscellaneous">
-            <param name="flat" type="float" min="0.1" max="10.0" precision="1" _gui-text="Curve flatness" _gui-description="Curves are divided into lines, this number controls how fine the curves will be reproduced, the smaller the finer (Default: '1.2')">1.2</param>
-            <param name="offsetX" type="float" min="-10000.0" max="10000.0" precision="2" _gui-text="X offset (mm)" _gui-description="The offset to shift your plot away from the zero point in mm (Default: '0.00')">0.00</param>
-            <param name="offsetY" type="float" min="-10000.0" max="10000.0" precision="2" _gui-text="Y offset (mm)" _gui-description="The offset to shift your plot away from the zero point in mm (Default: '0.00')">0.00</param>
+            <param name="flat" type="float" min="0.1" max="10.0" precision="1" _gui-text="Curve flatness" _gui-description="Curves are divided into lines, this number controls how fine the curves will be reproduced, the smaller the finer. (Default: '1.2')">1.2</param>
+            <param name="offsetX" type="float" min="-10000.0" max="10000.0" precision="2" _gui-text="X offset (mm)" _gui-description="The offset to move your plot away from the zero point on the X axis in mm. (Default: '0.00')">0.00</param>
+            <param name="offsetY" type="float" min="-10000.0" max="10000.0" precision="2" _gui-text="Y offset (mm)" _gui-description="The offset to move your plot away from the zero point on the Y axis in mm. (Default: '0.00')">0.00</param>
         </page>
     </param>
+    <_param name="settingsHelp" type="description">All these settings depend on the plotter you use, for more information please consult the manual or homepage for your plotter.</_param>
     <output>
         <extension>.hpgl</extension>
         <mimetype>image/hpgl</mimetype>
diff --git a/share/extensions/hpgl_output.py b/share/extensions/hpgl_output.py
index 3844dc332..d6f6b8eec 100755
--- a/share/extensions/hpgl_output.py
+++ b/share/extensions/hpgl_output.py
@@ -31,22 +31,24 @@ class MyEffect(inkex.Effect):
 
     def __init__(self):
         inkex.Effect.__init__(self)
-        self.OptionParser.add_option('--tab',              action='store', type='string',  dest='tab')
-        self.OptionParser.add_option('--resolutionX',      action='store', type='float',   dest='resolutionX',      default=1016.0,  help='Resolution X (dpi)')
-        self.OptionParser.add_option('--resolutionY',      action='store', type='float',   dest='resolutionY',      default=1016.0,  help='Resolution Y (dpi)')
-        self.OptionParser.add_option('--pen',              action='store', type='int',     dest='pen',              default=1,       help='Pen number')
-        self.OptionParser.add_option('--orientation',      action='store', type='string',  dest='orientation',      default='90',    help='Rotation (Clockwise)')
-        self.OptionParser.add_option('--mirrorX',          action='store', type='inkbool', dest='mirrorX',          default='FALSE', help='Mirror X-axis')
-        self.OptionParser.add_option('--mirrorY',          action='store', type='inkbool', dest='mirrorY',          default='FALSE', help='Mirror Y-axis')
-        self.OptionParser.add_option('--center',           action='store', type='inkbool', dest='center',           default='FALSE', help='Center zero point')
-        self.OptionParser.add_option('--flat',             action='store', type='float',   dest='flat',             default=1.2,     help='Curve flatness')
-        self.OptionParser.add_option('--useOvercut',       action='store', type='inkbool', dest='useOvercut',       default='TRUE',  help='Use overcut')
-        self.OptionParser.add_option('--overcut',          action='store', type='float',   dest='overcut',          default=1.0,     help='Overcut (mm)')
-        self.OptionParser.add_option('--useToolOffset',    action='store', type='inkbool', dest='useToolOffset',    default='TRUE',  help='Correct tool offset')
-        self.OptionParser.add_option('--toolOffset',       action='store', type='float',   dest='toolOffset',       default=0.25,    help='Tool offset (mm)')
-        self.OptionParser.add_option('--precut',           action='store', type='inkbool', dest='precut',           default='TRUE',  help='Use precut')
-        self.OptionParser.add_option('--offsetX',          action='store', type='float',   dest='offsetX',          default=0.0,     help='X offset (mm)')
-        self.OptionParser.add_option('--offsetY',          action='store', type='float',   dest='offsetY',          default=0.0,     help='Y offset (mm)')
+        self.OptionParser.add_option('--tab',           action='store', type='string',  dest='tab')
+        self.OptionParser.add_option('--resolutionX',   action='store', type='float',   dest='resolutionX',   default=1016.0,  help='Resolution X (dpi)')
+        self.OptionParser.add_option('--resolutionY',   action='store', type='float',   dest='resolutionY',   default=1016.0,  help='Resolution Y (dpi)')
+        self.OptionParser.add_option('--pen',           action='store', type='int',     dest='pen',           default=1,       help='Pen number')
+        self.OptionParser.add_option('--force',         action='store', type='int',     dest='force',         default=24,      help='Pen force (g)')
+        self.OptionParser.add_option('--speed',         action='store', type='int',     dest='speed',         default=20,      help='Pen speed (cm/s)')
+        self.OptionParser.add_option('--orientation',   action='store', type='string',  dest='orientation',   default='90',    help='Rotation (Clockwise)')
+        self.OptionParser.add_option('--mirrorX',       action='store', type='inkbool', dest='mirrorX',       default='FALSE', help='Mirror X axis')
+        self.OptionParser.add_option('--mirrorY',       action='store', type='inkbool', dest='mirrorY',       default='FALSE', help='Mirror Y axis')
+        self.OptionParser.add_option('--center',        action='store', type='inkbool', dest='center',        default='FALSE', help='Center zero point')
+        self.OptionParser.add_option('--flat',          action='store', type='float',   dest='flat',          default=1.2,     help='Curve flatness')
+        self.OptionParser.add_option('--useOvercut',    action='store', type='inkbool', dest='useOvercut',    default='TRUE',  help='Use overcut')
+        self.OptionParser.add_option('--overcut',       action='store', type='float',   dest='overcut',       default=1.0,     help='Overcut (mm)')
+        self.OptionParser.add_option('--useToolOffset', action='store', type='inkbool', dest='useToolOffset', default='TRUE',  help='Correct tool offset')
+        self.OptionParser.add_option('--toolOffset',    action='store', type='float',   dest='toolOffset',    default=0.25,    help='Tool offset (mm)')
+        self.OptionParser.add_option('--precut',        action='store', type='inkbool', dest='precut',        default='TRUE',  help='Use precut')
+        self.OptionParser.add_option('--offsetX',       action='store', type='float',   dest='offsetX',       default=0.0,     help='X offset (mm)')
+        self.OptionParser.add_option('--offsetY',       action='store', type='float',   dest='offsetY',       default=0.0,     help='Y offset (mm)')
 
     def effect(self):
         self.options.debug = False
diff --git a/share/extensions/plotter.inx b/share/extensions/plotter.inx
index 70bb85e37..e69099e1a 100644
--- a/share/extensions/plotter.inx
+++ b/share/extensions/plotter.inx
@@ -9,8 +9,8 @@
     <_param name="introduction" type="description">Please make sure that all objects you want to plot are converted to paths. The plot will automatically be aligned to the zero point.</_param>
     <param name="tab" type="notebook">
         <page name="misc" _gui-text="Connection">
-            <param name="serialPort" type="string" _gui-text="Serial port" _gui-description="The port of your serial connection, on Windows something like 'COM1', on Linux something like: '/dev/ttyUSB0' (Default: COM1)">COM1</param>
-            <param name="serialBaudRate" type="optiongroup" appearance="minimal" _gui-text="Serial baud rate" _gui-description="The Baud rate of your serial connection (Default: 9600)">
+            <param name="serialPort" type="string" _gui-text="Serial port" _gui-description="The port of your serial connection, on Windows something like 'COM1', on Linux something like: '/dev/ttyUSB0'. (Default: COM1)">COM1</param>
+            <param name="serialBaudRate" type="optiongroup" appearance="minimal" _gui-text="Serial baud rate" _gui-description="The Baud rate of your serial connection. (Default: 9600)">
                 <option value="9600">9600</option>
                 <option value="110">110</option>
                 <option value="300">300</option>
@@ -27,52 +27,56 @@
                 <option value="57600">57600</option>
                 <option value="115200">115200</option>
             </param>
-            <param name="flowControl" type="optiongroup" appearance="minimal" _gui-text="Flow control" _gui-description="Software / Hardware flow control - Try different settings to find the one that fits your plotter (Default: Software)">
+            <param name="flowControl" type="optiongroup" appearance="minimal" _gui-text="Flow control" _gui-description="The Software / Hardware flow control of your serial connection. (Default: Software)">
                 <_option value="xonxoff">Software (XON/XOFF)</_option>
                 <_option value="rtscts">Hardware (RTS/CTS)</_option>
                 <_option value="dsrdtrrtscts">Hardware (DSR/DTR + RTS/CTS)</_option>
                 <_option value="">None</_option>
             </param>
-            <param name="commandLanguage" type="optiongroup" appearance="minimal" _gui-text="Command language" _gui-description="The command language to use - Try different settings to find the one that fits your plotter (Default: HPGL)">
-                <option value="hpgl">HPGL</option>
-                <option value="dmpl">DMPL</option>
+            <param name="commandLanguage" type="optiongroup" appearance="minimal" _gui-text="Command language" _gui-description="The command language to use. (Default: HPGL)">
+                <option value="HPGL">HPGL</option>
+                <option value="DMPL">DMPL</option>
+                <option value="ZING">KNK Zing (HPGL variant)</option>
             </param>
             <param name="space" type="description">&#xa0;</param>
-            <_param name="serialHelp" type="description">This can be a physical serial connection or a USB-to-Serial bridge. Ask your plotter manufacturer for drivers if needed.</_param>
             <_param name="freezeHelp" type="description">Using wrong settings can under certain circumstances cause Inkscape to freeze. Always save your work before plotting.</_param>
+            <_param name="serialHelp" type="description">This can be a physical serial connection or a USB-to-Serial bridge. Ask your plotter manufacturer for drivers if needed.</_param>
             <_param name="parallelHelp" type="description">Parallel (LPT) connections are not supported.</_param>
         </page>
         <page name="plotter" _gui-text="Plotter Settings">
-            <param name="pen" type="int" min="0" max="99" _gui-text="Pen number" _gui-description="The number of the pen (tool) to use, on most plotters 1 (Standard: '1')">1</param>
-            <param name="resolutionX" type="float" min="1.0" max="4096.0" precision="1" _gui-text="Resolution X (dpi)" _gui-description="The amount of steps the cutter moves if it moves for 1 inch on the X axis - Try different settings to find the one that fits your plotter (Default: 1016.0)">1016.0</param>
-            <param name="resolutionY" type="float" min="1.0" max="4096.0" precision="1" _gui-text="Resolution Y (dpi)" _gui-description="The amount of steps the cutter moves if it moves for 1 inch on the Y axis - Try different settings to find the one that fits your plotter (Default: 1016.0)">1016.0</param>
-            <param name="mirrorX" type="boolean" _gui-text="Mirror X-axis" _gui-description="Check this to mirror the X axis (Default: Unchecked)">false</param>
-            <param name="mirrorY" type="boolean" _gui-text="Mirror Y-axis" _gui-description="Check this to mirror the Y axis - Try different settings to find the one that fits your plotter (Default: Unchecked)">false</param>
-            <param name="orientation" type="optiongroup" appearance="minimal" _gui-text="Rotation (Clockwise)" _gui-description="Rotation of the plot - Try different settings to find the one that fits your plotter (Default: 0°)">
+            <param name="resolutionX" type="float" min="1.0" max="4096.0" precision="1" _gui-text="Resolution X (dpi)" _gui-description="The amount of steps the cutter moves if it moves for 1 inch on the X axis. (Default: 1016.0)">1016.0</param>
+            <param name="resolutionY" type="float" min="1.0" max="4096.0" precision="1" _gui-text="Resolution Y (dpi)" _gui-description="The amount of steps the cutter moves if it moves for 1 inch on the Y axis. (Default: 1016.0)">1016.0</param>
+            <param name="pen" type="int" min="0" max="99" _gui-text="Pen number" _gui-description="The number of the pen (tool) to use. (Standard: '1')">1</param>
+            <param name="force" type="int" min="0" max="1000" _gui-text="Pen force (g)" _gui-description="The amount of force pushing down the pen in grams, set to 0 to omit command. Most plotters ignore this command. (Default: 24)">24</param>
+            <param name="speed" type="int" min="0" max="1000" _gui-text="Pen speed (cm/s)" _gui-description="The speed the pen will move with in centimetres per second, set to 0 to omit command. Most plotters ignore this command. (Default: 20)">20</param>
+            <param name="orientation" type="optiongroup" appearance="minimal" _gui-text="Rotation (Clockwise)" _gui-description="Rotation of the plot. (Default: 0°)">
                 <option value="0">0°</option>
                 <option value="90">90°</option>
                 <option value="180">180°</option>
                 <option value="270">270°</option>
             </param>
-            <param name="center" type="boolean" _gui-text="Center zero point" _gui-description="Check this if your plotter uses a centered zero point - Try different settings to find the one that fits your plotter (Default: Unchecked)">false</param>
+            <param name="mirrorX" type="boolean" _gui-text="Mirror X axis" _gui-description="Check this to mirror the X axis. (Default: Unchecked)">false</param>
+            <param name="mirrorY" type="boolean" _gui-text="Mirror Y axis" _gui-description="Check this to mirror the Y axis. (Default: Unchecked)">false</param>
+            <param name="center" type="boolean" _gui-text="Center zero point" _gui-description="Check this if your plotter uses a centered zero point. (Default: Unchecked)">false</param>
         </page>
         <page name="overcutToolOffset" _gui-text="Overcut &#x26; Tool Offset">
-            <param name="useOvercut" type="boolean" _gui-text="Use overcut" _gui-description="Check this to use the overcut, if not checked the 'Overcut' parameter is unused (Default: Checked)">true</param>
-            <param name="overcut" type="float" min="0.0" max="100.0" precision="2" _gui-text="Overcut (mm)" _gui-description="The distance in mm that will be cut over the starting point of the path to prevent open paths (Default: 1.00)">1.00</param>
+            <param name="useOvercut" type="boolean" _gui-text="Use overcut" _gui-description="Check this to use overcut, if not checked the 'Overcut' parameter is unused. (Default: Checked)">true</param>
+            <param name="overcut" type="float" min="0.0" max="100.0" precision="2" _gui-text="Overcut (mm)" _gui-description="The distance in mm that will be cut over the starting point of the path to prevent open paths. (Default: 1.00)">1.00</param>
             <param name="space" type="description">&#xa0;</param>
-            <param name="useToolOffset" type="boolean" _gui-text="Use tool offset correction" _gui-description="Check this to use the tool offset correction, if not checked the 'Tool offset' and 'Precut' parameters are unused (Default: Checked)">true</param>
-            <param name="toolOffset" type="float" min="0.0" max="20.0" precision="2" _gui-text="Tool offset (mm)" _gui-description="The offset from the tool tip to the tool axis in mm (Default: 0.25)">0.25</param>
-            <param name="precut" type="boolean" _gui-text="Use precut" _gui-description="Check this to cut a small line before the real drawing to align the tool orientation for the first cut (Default: Checked)">true</param>
+            <param name="useToolOffset" type="boolean" _gui-text="Use tool offset correction" _gui-description="Check this to use the tool offset correction, if not checked the 'Tool offset' and 'Precut' parameters are unused. (Default: Checked)">true</param>
+            <param name="toolOffset" type="float" min="0.0" max="20.0" precision="2" _gui-text="Tool offset (mm)" _gui-description="The offset from the tool tip to the tool axis in mm. (Default: 0.25)">0.25</param>
+            <param name="precut" type="boolean" _gui-text="Use precut" _gui-description="Check this to plot a small line before the real plot to align the tool orientation for the first real plot. (Default: Checked)">true</param>
             <param name="space" type="description">&#xa0;</param>
-            <_param name="offsetNote" type="description">Please note that using the tool offset correction will move your plot away from the zero point by the length in mm specified by the tool offset.</_param>
+            <_param name="offsetNote" type="description">Please note that using the tool offset correction will move your plot away from the zero point by one tool offset length.</_param>
         </page>
         <page name="misc" _gui-text="Miscellaneous">
-            <param name="flat" type="float" min="0.1" max="10.0" precision="1" _gui-text="Curve flatness" _gui-description="Curves are divided into lines, this number controls how fine the curves will be reproduced, the smaller the finer (Default: '1.2')">1.2</param>
-            <param name="offsetX" type="float" min="-10000.0" max="10000.0" precision="2" _gui-text="X offset (mm)" _gui-description="The offset to move your plot away from the zero point in mm (Default: '0.00')">0.00</param>
-            <param name="offsetY" type="float" min="-10000.0" max="10000.0" precision="2" _gui-text="Y offset (mm)" _gui-description="The offset to move your plot away from the zero point in mm (Default: '0.00')">0.00</param>
+            <param name="flat" type="float" min="0.1" max="10.0" precision="1" _gui-text="Curve flatness" _gui-description="Curves are divided into lines, this number controls how fine the curves will be reproduced, the smaller the finer. (Default: '1.2')">1.2</param>
+            <param name="offsetX" type="float" min="-10000.0" max="10000.0" precision="2" _gui-text="X offset (mm)" _gui-description="The offset to move your plot away from the zero point on the X axis in mm. (Default: '0.00')">0.00</param>
+            <param name="offsetY" type="float" min="-10000.0" max="10000.0" precision="2" _gui-text="Y offset (mm)" _gui-description="The offset to move your plot away from the zero point on the Y axis in mm. (Default: '0.00')">0.00</param>
             <param name="debug" type="boolean" _gui-text="Show debug information" _gui-description="Check this to get verbose information about the plot without actually sending something to the plotter (A.k.a. data dump). (Default: Unchecked)">false</param>
         </page>
     </param>
+    <_param name="settingsHelp" type="description">All these settings depend on the plotter you use, for more information please consult the manual or homepage for your plotter.</_param>
     <effect needs-live-preview="false">
         <object-type>path</object-type>
         <effects-menu>
diff --git a/share/extensions/plotter.py b/share/extensions/plotter.py
index a5f75f6b3..574e2253c 100644
--- a/share/extensions/plotter.py
+++ b/share/extensions/plotter.py
@@ -39,9 +39,11 @@ class MyEffect(inkex.Effect):
         self.OptionParser.add_option('--resolutionX',     action='store', type='float',   dest='resolutionX',     default=1016.0,  help='Resolution X (dpi)')
         self.OptionParser.add_option('--resolutionY',     action='store', type='float',   dest='resolutionY',     default=1016.0,  help='Resolution Y (dpi)')
         self.OptionParser.add_option('--pen',             action='store', type='int',     dest='pen',             default=1,       help='Pen number')
+        self.OptionParser.add_option('--force',           action='store', type='int',     dest='force',           default=24,      help='Pen force (g)')
+        self.OptionParser.add_option('--speed',           action='store', type='int',     dest='speed',           default=20,      help='Pen speed (cm/s)')
         self.OptionParser.add_option('--orientation',     action='store', type='string',  dest='orientation',     default='90',    help='Rotation (Clockwise)')
-        self.OptionParser.add_option('--mirrorX',         action='store', type='inkbool', dest='mirrorX',         default='FALSE', help='Mirror X-axis')
-        self.OptionParser.add_option('--mirrorY',         action='store', type='inkbool', dest='mirrorY',         default='FALSE', help='Mirror Y-axis')
+        self.OptionParser.add_option('--mirrorX',         action='store', type='inkbool', dest='mirrorX',         default='FALSE', help='Mirror X axis')
+        self.OptionParser.add_option('--mirrorY',         action='store', type='inkbool', dest='mirrorY',         default='FALSE', help='Mirror Y axis')
         self.OptionParser.add_option('--center',          action='store', type='inkbool', dest='center',          default='FALSE', help='Center zero point')
         self.OptionParser.add_option('--flat',            action='store', type='float',   dest='flat',            default=1.2,     help='Curve flatness')
         self.OptionParser.add_option('--useOvercut',      action='store', type='inkbool', dest='useOvercut',      default='TRUE',  help='Use overcut')
@@ -63,7 +65,7 @@ class MyEffect(inkex.Effect):
             import serial
         except ImportError, e:
             inkex.errormsg(_("pySerial is not installed."
-                + "\n\n1. Download pySerial here (not the \".exe\"): http://pypi.python.org/pypi/pyserial"
+                + "\n\n1. Download pySerial here (not the \".exe\"!): http://pypi.python.org/pypi/pyserial"
                 + "\n2. Extract the \"serial\" subfolder from the zip to the following folder: C:\\[Program files]\\inkscape\\python\\Lib\\"
                 + "\n3. Restart Inkscape."))
             return
@@ -92,95 +94,123 @@ class MyEffect(inkex.Effect):
         # deliver document to inkscape
         self.document = doc
         '''
-        if self.options.commandLanguage == 'dmpl':
-            # convert HPGL to DMPL
-            self.hpgl = self.hpgl.replace(';', ',')
-            self.hpgl = self.hpgl.replace('PU', 'U')
-            self.hpgl = self.hpgl.replace('PD', 'D')
-            self.hpgl = re.sub(r'IN,SP([0-9]{1,2}),', r';:HAL0P\1EC1', self.hpgl)
-            self.hpgl += 'Z'
+        # convert to other formats
+        if self.options.commandLanguage == 'DMPL':
+            self.convertToDmpl()
+        if self.options.commandLanguage == 'ZING':
+            self.convertToZing()
+        # output
         if self.options.debug:
-            # show debug information
-            inkex.errormsg("---------------------------------\nDebug information\n---------------------------------\n\nSettings:\n")
-            inkex.errormsg('  Serial Port: ' + str(self.options.serialPort))
-            inkex.errormsg('  Serial baud rate: ' + str(self.options.serialBaudRate))
-            inkex.errormsg('  Flow control: ' + str(self.options.flowControl))
-            inkex.errormsg('  Command language: ' + str(self.options.commandLanguage))
-            inkex.errormsg('  Pen number: ' + str(self.options.pen))
-            inkex.errormsg('  Resolution X (dpi): ' + str(self.options.resolutionX))
-            inkex.errormsg('  Resolution Y (dpi): ' + str(self.options.resolutionY))
-            inkex.errormsg('  Mirror X-axis: ' + str(self.options.mirrorX))
-            inkex.errormsg('  Mirror Y-axis: ' + str(self.options.mirrorY))
-            inkex.errormsg('  Rotation (Clockwise): ' + str(self.options.orientation))
-            inkex.errormsg('  Center zero point: ' + str(self.options.center))
-            inkex.errormsg('  Use overcut: ' + str(self.options.useOvercut))
-            inkex.errormsg('  Overcut (mm): ' + str(self.options.overcut))
-            inkex.errormsg('  Use tool offset correction: ' + str(self.options.useToolOffset))
-            inkex.errormsg('  Tool offset (mm): ' + str(self.options.toolOffset))
-            inkex.errormsg('  Use precut: ' + str(self.options.precut))
-            inkex.errormsg('  Curve flatness: ' + str(self.options.flat))
-            inkex.errormsg('  X offset (mm): ' + str(self.options.offsetX))
-            inkex.errormsg('  Y offset (mm): ' + str(self.options.offsetY))
-            inkex.errormsg('  Show debug information: ' + str(self.options.debug))
-            inkex.errormsg("\nDocument properties:\n")
-            version = self.document.getroot().xpath('//@inkscape:version', namespaces=inkex.NSS)
-            if version:
-                inkex.errormsg('  Inkscape version: ' + version[0])
-            fileName = self.document.getroot().xpath('//@sodipodi:docname', namespaces=inkex.NSS)
-            if fileName:
-                inkex.errormsg('  Filename: ' + fileName[0])
-            inkex.errormsg('  Document unit: ' + self.documentUnit)
-            inkex.errormsg('  Width: ' + str(self.unittouu(self.document.getroot().get('width'))) + ' ' + self.documentUnit)
-            inkex.errormsg('  Height: ' + str(self.unittouu(self.document.getroot().get('height'))) + ' ' + self.documentUnit)
-            viewBox = self.document.getroot().get('viewBox')
-            if viewBox:
-                viewBox = string.split(viewBox, ' ')
-                if viewBox[2] and viewBox[3]:
-                    inkex.errormsg('  Viewbox Width: ' + str(self.unittouu(viewBox[2])) + ' ' + self.documentUnit)
-                    inkex.errormsg('  Viewbox Height: ' + str(self.unittouu(viewBox[3])) + ' ' + self.documentUnit)
-            if self.options.commandLanguage == 'dmpl':
-                inkex.errormsg("\nDMPL properties:\n")
-            else:
-                inkex.errormsg("\nHPGL properties:\n")
-            inkex.errormsg('  Drawing width: ' + str(self.unittouu(str((debugObject.sizeX - debugObject.divergenceX) / debugObject.scaleX))) + ' ' + self.documentUnit)
-            inkex.errormsg('  Drawing height: ' + str(self.unittouu(str((debugObject.sizeY - debugObject.divergenceY) / debugObject.scaleY))) + ' ' + self.documentUnit)
-            inkex.errormsg('  Drawing width: ' + str(debugObject.sizeX - debugObject.divergenceX) + ' plotter steps')
-            inkex.errormsg('  Drawing height: ' + str(debugObject.sizeY - debugObject.divergenceY) + ' plotter steps')
-            inkex.errormsg('  Offset X: ' + str(debugObject.offsetX) + ' plotter steps')
-            inkex.errormsg('  Offset Y: ' + str(debugObject.offsetX) + ' plotter steps')
-            inkex.errormsg('  Overcut: ' + str(debugObject.overcut) + ' plotter steps')
-            inkex.errormsg('  Tool offset: ' + str(debugObject.toolOffset) + ' plotter steps')
-            inkex.errormsg('  Flatness: ' + str(debugObject.flat) + ' plotter steps')
-            inkex.errormsg('  Tool offset flatness: ' + str(debugObject.toolOffsetFlat) + ' plotter steps')
-            if self.options.commandLanguage == 'dmpl':
-                inkex.errormsg("\nDMPL data:\n")
+            self.showDebugInfo(debugObject)
+        else:
+            self.sendHpglToSerial()
+
+    def convertToDmpl(self):
+        # convert HPGL to DMPL
+        # ;: = Initialise plotter
+        # H = Home position
+        # A = Absolute pen positioning
+        # Ln = Line type
+        # Pn = Pen select
+        # Vn = velocity
+        # ECn = Coordinate addressing, 1: 0.001 inch, 5: 0.005 inch, M: 0.1 mm
+        # D = Pen down
+        # U = Pen up
+        # Z = Reset plotter
+        # n,n, = Coordinate pair
+        self.hpgl = self.hpgl.replace(';', ',')
+        self.hpgl = self.hpgl.replace('PU', 'U')
+        self.hpgl = self.hpgl.replace('PD', 'D')
+        velocity = ''
+        if self.options.speed > 0:
+            velocity = 'V' + str(self.options.speed)
+        self.hpgl = re.sub(r'IN,SP[0-9]+(,FS[0-9]+)?(,VS[0-9]+)?,', r';:HAL0P' + str(self.options.pen) + velocity + 'EC1', self.hpgl)
+        self.hpgl += 'Z'
+
+    def convertToZing(self):
+        # convert HPGL to Zing
+        self.hpgl = self.hpgl.replace('IN;', 'ZG;')
+        self.hpgl += '@'
+
+    def sendHpglToSerial(self):
+        # send data to plotter
+        mySerial = serial.Serial()
+        mySerial.port = self.options.serialPort
+        mySerial.baudrate = self.options.serialBaudRate
+        mySerial.timeout = 0.1
+        if self.options.flowControl == 'xonxoff':
+            mySerial.xonxoff = True
+        if self.options.flowControl == 'rtscts' or self.options.flowControl == 'dsrdtrrtscts':
+            mySerial.rtscts = True
+        if self.options.flowControl == 'dsrdtrrtscts':
+            mySerial.dsrdtr = True
+        try:
+            mySerial.open()
+        except Exception as inst:
+            if 'ould not open port' in inst.args[0]:
+                inkex.errormsg(_("Could not open port. Please check that your plotter is running, connected and the settings are correct."))
+                return
             else:
-                inkex.errormsg("\nHPGL data:\n")
-            inkex.errormsg(self.hpgl)
+                type, value, traceback = sys.exc_info()
+                raise ValueError, ('', type, value), traceback
+        mySerial.write(self.hpgl)
+        mySerial.read(2)
+        mySerial.close()
+
+    def showDebugInfo(self, debugObject):
+        # show debug information
+        inkex.errormsg("---------------------------------\nDebug information\n---------------------------------\n\nSettings:\n")
+        inkex.errormsg('  Serial Port: ' + str(self.options.serialPort))
+        inkex.errormsg('  Serial baud rate: ' + str(self.options.serialBaudRate))
+        inkex.errormsg('  Flow control: ' + str(self.options.flowControl))
+        inkex.errormsg('  Command language: ' + str(self.options.commandLanguage))
+        inkex.errormsg('  Resolution X (dpi): ' + str(self.options.resolutionX))
+        inkex.errormsg('  Resolution Y (dpi): ' + str(self.options.resolutionY))
+        inkex.errormsg('  Pen number: ' + str(self.options.pen))
+        inkex.errormsg('  Pen force (g): ' + str(self.options.force))
+        inkex.errormsg('  Pen speed (cm/s): ' + str(self.options.speed))
+        inkex.errormsg('  Rotation (Clockwise): ' + str(self.options.orientation))
+        inkex.errormsg('  Mirror X axis: ' + str(self.options.mirrorX))
+        inkex.errormsg('  Mirror Y axis: ' + str(self.options.mirrorY))
+        inkex.errormsg('  Center zero point: ' + str(self.options.center))
+        inkex.errormsg('  Use overcut: ' + str(self.options.useOvercut))
+        inkex.errormsg('  Overcut (mm): ' + str(self.options.overcut))
+        inkex.errormsg('  Use tool offset correction: ' + str(self.options.useToolOffset))
+        inkex.errormsg('  Tool offset (mm): ' + str(self.options.toolOffset))
+        inkex.errormsg('  Use precut: ' + str(self.options.precut))
+        inkex.errormsg('  Curve flatness: ' + str(self.options.flat))
+        inkex.errormsg('  X offset (mm): ' + str(self.options.offsetX))
+        inkex.errormsg('  Y offset (mm): ' + str(self.options.offsetY))
+        inkex.errormsg('  Show debug information: ' + str(self.options.debug))
+        inkex.errormsg("\nDocument properties:\n")
+        version = self.document.getroot().xpath('//@inkscape:version', namespaces=inkex.NSS)
+        if version:
+            inkex.errormsg('  Inkscape version: ' + version[0])
+        fileName = self.document.getroot().xpath('//@sodipodi:docname', namespaces=inkex.NSS)
+        if fileName:
+            inkex.errormsg('  Filename: ' + fileName[0])
+        inkex.errormsg('  Document unit: ' + debugObject.documentUnit)
+        inkex.errormsg('  Width: ' + str(debugObject.debugValues[0]) + ' ' + debugObject.documentUnit)
+        inkex.errormsg('  Height: ' + str(debugObject.debugValues[1]) + ' ' + debugObject.documentUnit)
+        if debugObject.debugValues[2] == 0:
+            inkex.errormsg('  Viewbox Width: -')
+            inkex.errormsg('  Viewbox Height: -')
         else:
-            # send data to plotter
-            mySerial = serial.Serial()
-            mySerial.port = self.options.serialPort
-            mySerial.baudrate = self.options.serialBaudRate
-            mySerial.timeout = 0.1
-            if self.options.flowControl == 'xonxoff':
-                mySerial.xonxoff = True
-            if self.options.flowControl == 'rtscts' or self.options.flowControl == 'dsrdtrrtscts':
-                mySerial.rtscts = True
-            if self.options.flowControl == 'dsrdtrrtscts':
-                mySerial.dsrdtr = True
-            try:
-                mySerial.open()
-            except Exception as inst:
-                if 'ould not open port' in inst.args[0]:
-                    inkex.errormsg(_("Could not open port. Please check that your plotter is running, connected and the settings are correct."))
-                    return
-                else:
-                    type, value, traceback = sys.exc_info()
-                    raise ValueError, ('', type, value), traceback
-            mySerial.write(self.hpgl)
-            mySerial.read(2)
-            mySerial.close()
+            inkex.errormsg('  Viewbox Width: ' + str(debugObject.debugValues[2]) + ' ' + debugObject.documentUnit)
+            inkex.errormsg('  Viewbox Height: ' + str(debugObject.debugValues[3]) + ' ' + debugObject.documentUnit)
+        inkex.errormsg("\n" + self.options.commandLanguage + " properties:\n")
+        inkex.errormsg('  Drawing width: ' + str(debugObject.debugValues[6]) + ' ' + debugObject.documentUnit)
+        inkex.errormsg('  Drawing height: ' + str(debugObject.debugValues[7]) + ' ' + debugObject.documentUnit)
+        inkex.errormsg('  Drawing width: ' + str(debugObject.debugValues[4]) + ' plotter steps')
+        inkex.errormsg('  Drawing height: ' + str(debugObject.debugValues[5]) + ' plotter steps')
+        inkex.errormsg('  Offset X: ' + str(debugObject.offsetX) + ' plotter steps')
+        inkex.errormsg('  Offset Y: ' + str(debugObject.offsetX) + ' plotter steps')
+        inkex.errormsg('  Overcut: ' + str(debugObject.overcut) + ' plotter steps')
+        inkex.errormsg('  Tool offset: ' + str(debugObject.toolOffset) + ' plotter steps')
+        inkex.errormsg('  Flatness: ' + str(debugObject.flat) + ' plotter steps')
+        inkex.errormsg('  Tool offset flatness: ' + str(debugObject.toolOffsetFlat) + ' plotter steps')
+        inkex.errormsg("\n" + self.options.commandLanguage + " data:\n")
+        inkex.errormsg(self.hpgl)
 
 if __name__ == '__main__':
     # start extension