cutting errors

Post Reply
mswrites
Vectric Apprentice
Posts: 51
Joined: Wed Dec 28, 2011 1:52 am
Model of CNC Machine: v90

cutting errors

Post by mswrites »

F2 fault_viewer .JPG
F2.crv
(795 KiB) Downloaded 164 times
Hello,
I'm getting cutting errors on this piece. I draw it in some modeling software, export it as dxf.
These errors do not show up in some modeling software, CoralCad or Vcarve picture viewer

See pictures.

Please help.

Marv

ps Thanks Brian for previous help on planes and symmetrical drawing
Attachments
F2 fault.jpg
F2.dxf
(85.3 KiB) Downloaded 181 times

PaulRowntree
Vectric Wizard
Posts: 1687
Joined: Sun Oct 24, 2010 7:28 pm
Model of CNC Machine: homebuilt 4'x2' (Mach3+G540)
Location: Guelph, Ontario
Contact:

Re: cutting errors

Post by PaulRowntree »

This looks like a hardware problem, nothing to do with the software side.

Check for backlash on your X-Y axes, loose couplers would do this too.
Paul Rowntree
WarpDriver, StandingWave, Topo and gadgets available at PaulRowntree.weebly.com

User avatar
Adrian
Vectric Archimage
Posts: 14651
Joined: Thu Nov 23, 2006 2:19 pm
Model of CNC Machine: ShopBot PRS Alpha 96x48
Location: Surrey, UK

Re: cutting errors

Post by Adrian »

It would be worth spending some time with the "Fit Curves to Vectors" tool as well to convert all the hundreds of individual nodes on the corners into nice smooth arcs that will machine a lot better once you've got the hardware issue sorted.

User avatar
Leo
Vectric Wizard
Posts: 4089
Joined: Sat Jul 14, 2007 3:02 am
Model of CNC Machine: 1300 x 1300 x 254 Chinese Made
Location: East Freetown, Ma.
Contact:

Re: cutting errors

Post by Leo »

I don't see anything wrong in the program file.

Does Probotics have a support forum to show them you issue?
Imagine the Possibilities of a Creative mind, combined with the functionality of CNC

mswrites
Vectric Apprentice
Posts: 51
Joined: Wed Dec 28, 2011 1:52 am
Model of CNC Machine: v90

Re: cutting errors

Post by mswrites »

Hello,

PROBLEM SOLVED!
No hardware issues found.
Most interesting. I exported the files from some modeling software using the .pdf format instead of .dxf format to VCarve Pro. No cutting errors!

Adrian,
My normal routine after file is loaded into VCarve is to 1/ move drawing to xy,0,0 2/ check for duplicate vectors/remove DV 3/ check for open vectors/close open vectors.

Should I add "select all" and "fit curves to selected vectors" to my routine?

Thanks for helping

User avatar
Adrian
Vectric Archimage
Posts: 14651
Joined: Thu Nov 23, 2006 2:19 pm
Model of CNC Machine: ShopBot PRS Alpha 96x48
Location: Surrey, UK

Re: cutting errors

Post by Adrian »

Exporting as PDF basically exports as EPS format which supports bezier curves for the curves rather than the hundreds of little line segments that you get with a DXF so you won't need the fit curves if you do it that way.

It's probably why it's cutting ok now as well. Sounds like your control software isn't handling the slow down for corners well when it's lots of short line segments.

mswrites
Vectric Apprentice
Posts: 51
Joined: Wed Dec 28, 2011 1:52 am
Model of CNC Machine: v90

Re: cutting errors

Post by mswrites »

Thank you Adrian.

Post Reply