Inkscape Gcodetools plug-in English support forum

Nick · Сообщение **Nick** » 10 дек 2009, 10:28

: Generated Gcode in EMC2

Type	Extension of vector graphics editor Inkscape
Developer	Gcodetools develop team
Written in	Python
OS	Cross-Platform (Windows, Linux, MacOS)
Version	1.6.03
License	GNU GPL
Downloads	7800+

Gcodetools

Gcodetools is a plug-in for Inkscape. It prepares and converts paths from Inkscape to Gcode, using biarc interpolation.

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alfcnc · Сообщение **alfcnc** » 28 фев 2011, 02:53

For don't lose precision I've see that you put all the with to 0.00 when do offset or area trace..
So i put with of the original path to 0.00 before Stroke to path Ctrl+alt+c and Union and this give good result..
But always no solution to have just outside or inside without doing another boolean after this...

Nick · Сообщение **Nick** » 28 фев 2011, 10:47

Sorry for not answering for 2 days, I was out of Russia so I was not able to check the forum.

As for the DXF import. I've faced the same problem some weeks ago. It happens because the path is imported divided into the segments. If you try to break it apart with Ctrl+Shift+K, you'll see a lot of small segments.
I've made a small extension to fix it.

But when I've announced it on the linuxgraphics.ru I was told a better solution.
1. Select all the paths.
2. Go to node editing mode F2. And select all the nodes Ctrl+A.
3. Press the button to all separate nodes into one node. This one:

: join nodes inkscape dxf import.png (681 байт) 5925 просмотров

So my extension is pointless

.

--------------------------

The latest version is in the first post of this thread. And gcodetools.py file should have this lines at the top:

Код: Выделить всё

###
###		Gcodetools v 1.6.04 
###
gcodetools_current_version = "1.6.04"

------------------------------

Encoding problem:

Try to put these lines into gcodetools.py (at the top):

Код: Выделить всё

#!/usr/bin/env python 
# -*- coding: utf-8 -*-

instead of

Код: Выделить всё

#!/usr/bin/env python

If it fixes the problem I'll add it to mainstream.

alfcnc · Сообщение **alfcnc** » 28 фев 2011, 12:42

For the node joining ! I'll have ever test this method for that's don't work....
It's logical because the join node is just for terminal node ...and if I do select all , middle node are select too and the tool d'ont work....
For it work i must select terminal node manually one by one... very very long work...
I think your extension is not so pointless...

Nick · Сообщение **Nick** » 28 фев 2011, 13:00

I've just tried it on your path. Select path, F2, Ctrl+A and join.
Works fine:

test_area.svg: (13.44 КБ) 915 скачиваний

What Inkscape version do you have?

Here's my extension if join nodes method does not work:

alfcnc · Сообщение **alfcnc** » 28 фев 2011, 13:14

Ok !
On inkscape 0.47 that's don't work but on 0.48 Yes works great... and I haven't test this method on 0.48...
very very sad for me ! I'll ve won many hours of works...

Thanks for the extension i'll test it on 0.47 , because it's good for those are always on 0.47

For the encoding !
I have done the change and this don't work... and finally I'm don't know if that come from that..
Because a the end of the error lxml.etree say Document is empty.... so the problem come before lxml work... I'll must set debug mode to find were this crash...

alfcnc · Сообщение **alfcnc** » 28 фев 2011, 13:28

Ok !
Your extension Joinpath work very well on 0.47.0-2+b1 on Debian...

alfcnc · Сообщение **alfcnc** » 28 фев 2011, 13:34

Could you give some indication how to debug to try to find were is the problem...

alfcnc · Сообщение **alfcnc** » 28 фев 2011, 14:06

Hi !
I'll ve path to gcode some path...i'll have a Z safe of 20mm and cuting depht of 5 with Z step of 1...
I path to gcode with ver 1.6.04...

testplunge.svg: (57.51 КБ) 1009 скачиваний

this give me :

testplunge_0001.ngc: (33.47 КБ) 1268 скачиваний

First problem... the plunge speed is set by the tool definition! it's ok.
But when the tools goes from 20mm high to the material the plunge speed must be G00 or it's
G01 all the plunge...
So it's must be go to speed G00 from Z Top rapid move position to Z cut position and then start Cut depth speed...

alfcnc · Сообщение **alfcnc** » 28 фев 2011, 14:20

Another problem his if put multiple path whit step plunge cut...
It do first pass of each path and the second one... logical will be make all the pass of one path and
all the cut pass of the others...
If setting all path with a different layer that's make with this order...but curious things... until all depth
cut path the tool return to the Z G00 safe position... interesting when doing drilling but not for milling...
I've see that in dev version you have set some option to choose different logic of cutting pass...well to see.

Nick · Сообщение **Nick** » 28 фев 2011, 14:37

Hmmmm...

It goes from 20mm to Zcut position with the penetration speed. It's set so because it could be unsafe to go toward the surface at rapid speed.

You can reduce safe distance to reduce the time it takes to penetrate. Or make an replace
"G01 Z[0-9\-\.]+ F100.0" to "G00 Z0 \n \0" using regex.
Also you cat automate this procedure by using post-processor.

To debug what's wring with the lxml try to change inkex.py parse function from /usr/share/inkscape/extensions to something like:

Код: Выделить всё

   def parse(self,file=None):
        """Parse document in specified file or on stdin"""
    f = open("/home/user/out.txt",'w')
        try:
            try:
                stream = open(file,'r')
                f.write("File from func param %s"%file)
            except:
                stream = open(self.svg_file,'r')
                f.write("File from arg %s"%self.svg_file)
        except:
            stream = sys.stdin
            f.write("File from stdin ")
        f.write("\n\n")
		f.write(stream.readlines())
		f.close()

Replace /home/user to your home dir.

And then look in the out.txt for stream contents.

-------------------------

Yes dev version has some options to order the paths. But still it would go up and down each pass. You can get rid of it by the regex replace/

alfcnc · Сообщение **alfcnc** » 28 фев 2011, 15:10

"It goes from 20mm to Zcut position with the penetration speed. It's set so because it could be unsafe to go toward the surface at rapid speed. "

Ok ! but i found this very very curious because the cnc is made for don't error on positionning even if go to G00 speed...So if you have take care of your material width accuracy you set the orientation point with a Z depth that take this security into account...and then you can go to G00 to the top of your material to be cutting...

Thank's for the solution regex and postprocessor...

Nick · Сообщение **Nick** » 28 фев 2011, 15:53

By unsafe I mean there's could be something in the cutters way. Gcodetools does not know anything about the surface except it's path. And it knows that it can move at rapid speed at the safe distance above the surface. So anything below the safe distance should be assumed as "probably cutting" so it should be done with G01. And when it goes down from the safe distance it actually "probably penetrates", so this move should be done at the penetration speed.

That's how I see it.

alfcnc · Сообщение **alfcnc** » 28 фев 2011, 16:07

root писал(а):Hmmmm...

It goes from 20mm to Zcut position with the penetration speed. It's set so because it could be unsafe to go toward the surface at rapid speed.

You can reduce safe distance to reduce the time it takes to penetrate. Or make an replace
"G01 Z[0-9\-\.]+ F100.0" to "G00 Z0 \n \0" using regex.
Also you cat automate this procedure by using post-processor.

To debug what's wring with the lxml try to change inkex.py parse function from /usr/share/inkscape/extensions to something like:
Код: Выделить всё
   def parse(self,file=None):
        """Parse document in specified file or on stdin"""
    f = open("/home/user/out.txt",'w')
        try:
            try:
                stream = open(file,'r')
                f.write("File from func param %s"%file)
            except:
                stream = open(self.svg_file,'r')
                f.write("File from arg %s"%self.svg_file)
        except:
            stream = sys.stdin
            f.write("File from stdin ")
        f.write("\n\n")
		f.write(stream.readlines())
		f.close()
Replace /home/user to your home dir.

And then look in the out.txt for stream contents.

-------------------------

Yes dev version has some options to order the paths. But still it would go up and down each pass. You can get rid of it by the regex replace/

Hum ! I don't understand i have indent error on line with the first " try: "
I have try to change indentation but no result ???

Nick · Сообщение **Nick** » 28 фев 2011, 16:17

upsss add some spaces before f = open("/home/user/out.txt",'w') to match try.
Look at the /home/user/out.txt. Post it here.

alfcnc · Сообщение **alfcnc** » 28 фев 2011, 18:20

Yes ok ! some space here and some on others line...

After try a Pathtogcode the file output contain:

File from arg /tmp/ink_ext_XXXXXX.svg60FNRV

The gcodetools traceback in Inkscape:

Traceback (most recent call last):
File "/usr/share/inkscape/extensions/gcodetools.py", line 4602, in <module>
e.affect()
File "/usr/share/inkscape/extensions/inkex.py", line 221, in affect
self.parse()
File "/usr/share/inkscape/extensions/inkex.py", line 156, in parse
f.write(stream.readlines())
TypeError: argument 1 must be string or read-only character buffer, not list

And the file in tmp is the copy of the file svg i am using in inkscape...

Nick · Сообщение **Nick** » 28 фев 2011, 18:24

replace f.write(stream.readlines())
with:
for i in stream.readlines() :
f.write(i)

alfcnc · Сообщение **alfcnc** » 28 фев 2011, 18:45

Done : Give traceback:

Traceback (most recent call last):
File "/usr/share/inkscape/extensions/gcodetools.py", line 4602, in <module>
e.affect()
File "/usr/share/inkscape/extensions/inkex.py", line 223, in affect
self.getposinlayer()
File "/usr/share/inkscape/extensions/inkex.py", line 162, in getposinlayer
self.current_layer = self.document.getroot()
AttributeError: 'NoneType' object has no attribute 'getroot

And the output.txt i set in file because long...

debuggcodetools.txt: (12.71 КБ) 1253 скачивания

alfcnc · Сообщение **alfcnc** » 28 фев 2011, 18:46

I think start a post for the making of post processor...do you agree...?
Have you some start point to tell me for that ?

Nick · Сообщение **Nick** » 28 фев 2011, 18:58

It's strange. Why lxml thinks that the tree is empty when it's not...
I'll got to think about it some more

---------------------------

Post-processing theme was opened a while ago:
http://cnc-club.ru/forum/viewtopic.php?f=33&t=78

alfcnc · Сообщение **alfcnc** » 28 фев 2011, 19:28

excuse me ! I'haven't see it ...

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