VcarvePro Post Processor for Shapeoko XXL


(Chris) #1

I found last night after routing some large 600mm circles that my version of Vcarve pro and its built in shapeoko post processor were turning all arcs into short straight segments. unnoticeable at small dimensions but quite noticeable at 600mm dia. After a little searching I found the one at Inventables and it seems to work as designed regarding circular interpolation.


Going to GRBL 1'1
(Mad Hatter) #2

Well, that explains why the fonts look like crap on my diamond drag engravings, but look fine on screen.

Thanks for the info.


(Michael Walker) #3

I guess I do not understand, what Version of Vcarve do you have? or did have? i just bought VCarve and mine has them in it, unless these are different? or updated? I have Version 9.5 I believe…


(Chris) #4

The way to check is to create a cicular toolpath and save the gcode. then open the gcode in notepad. if there are circular I&J elements in the code then its the latest PP. if not you need to use the inventables PP or email Vectric support for their updated version.

you are looking for lines of code like this:

G2 X329.9489 Y595.1595 I-14.9936 J-296.2959 F1800.0
G2 X344.8277 Y593.2687 I-29.9489 J-295.1595

Early versions of GRBL could not circular interpolate. So it broke circle sand arcs into short straight lines.


(Jeff Peters) #5

So Let me get this right.I make circles in vcarve pro right? generate tool paths in vcarve pro and save gcode with the shapeoko post processor in vcarve pro and then open the gcode and look for l and J right.
Also is the last line pertaining to vcarve GRBL or Carbide motion
Thanks Jeff


(Jeff Peters) #6

Ok I downloaded the file for the shapeoko post processor. It is a zip file after extracting it.
How do I get it into my 9.5 version of vcarve pro.
Thanks Jeff


(Jeff Peters) #7

I opened the gcode note pad and did not see any l orJ . All I saw was G anY. I did a 8in circle and a profile cutout with a 1/4" bit
Jeff


(Chris) #8

You got the file from the link above. then you extract and then open vcarve, start a new file and go to the top menu bar under TOOLPATHS the last selection is install a post processor.

do this then save that file and close and reopen vcarve

this is the code mine output for a 250mm circle
G17
G21
G0 Z36.5000
G0 X0.0000 Y0.0000 S20000 M3
G0 X195.9091 Y454.0841 Z22.4990
G1 Z14.4688 F750.0
G2 X324.0841 Y325.9091 I0.0000 J-128.1750 F1800.0
G2 X195.9091 Y197.7341 I-128.1750 J0.0000
G2 X67.7341 Y325.9091 I0.0000 J128.1750
G2 X195.9091 Y454.0841 I128.1750 J0.0000
G1 Z12.4375 F750.0
G2 X324.0841 Y325.9091 I0.0000 J-128.1750 F1800.0
G2 X195.9091 Y197.7341 I-128.1750 J0.0000
G2 X67.7341 Y325.9091 I0.0000 J128.1750
G2 X195.9091 Y454.0841 I128.1750 J0.0000
G1 Z10.4063 F750.0
G2 X324.0841 Y325.9091 I0.0000 J-128.1750 F1800.0
G2 X195.9091 Y197.7341 I-128.1750 J0.0000
G2 X67.7341 Y325.9091 I0.0000 J128.1750
G2 X195.9091 Y454.0841 I128.1750 J0.0000
G1 Z8.3750 F750.0
G2 X324.0841 Y325.9091 I0.0000 J-128.1750 F1800.0
G2 X195.9091 Y197.7341 I-128.1750 J0.0000
G2 X67.7341 Y325.9091 I0.0000 J128.1750
G2 X195.9091 Y454.0841 I128.1750 J0.0000
G1 Z6.3438 F750.0
G2 X324.0841 Y325.9091 I0.0000 J-128.1750 F1800.0
G2 X195.9091 Y197.7341 I-128.1750 J0.0000
G2 X67.7341 Y325.9091 I0.0000 J128.1750
G2 X195.9091 Y454.0841 I128.1750 J0.0000
G1 Z4.3125 F750.0
G2 X324.0841 Y325.9091 I0.0000 J-128.1750 F1800.0
G2 X195.9091 Y197.7341 I-128.1750 J0.0000
G2 X67.7341 Y325.9091 I0.0000 J128.1750
G2 X195.9091 Y454.0841 I128.1750 J0.0000
G1 Z2.2813 F750.0
G2 X324.0841 Y325.9091 I0.0000 J-128.1750 F1800.0
G2 X195.9091 Y197.7341 I-128.1750 J0.0000
G2 X67.7341 Y325.9091 I0.0000 J128.1750
G2 X195.9091 Y454.0841 I128.1750 J0.0000
G1 Z0.2500 F750.0
G2 X324.0841 Y325.9091 I0.0000 J-128.1750 F1800.0
G2 X195.9091 Y197.7341 I-128.1750 J0.0000
G2 X67.7341 Y325.9091 I0.0000 J128.1750
G2 X195.9091 Y454.0841 I128.1750 J0.0000
G0 Z22.4990
G0 Z36.5000
G0 X0.0000 Y0.0000
M30