Messages

1

FAQs / Re: straight corners in rhino and mach3 but radiused when I machine. Help!

« on: September 12, 2009, 10:18:06 PM »

Hi Sam
Thanks for the reply. I now have straight corners. Changed the look ahead to 300 units and decreased the cv distance tolerance units to 5.
This may be extreme. I don't know as I am new to mach 3.
Gerry on cnc zone suggested trying running in exact stop mode (g61)to see if I this gave me square corners.Choppy and slow on the arcs but perfect corners.
His suggestion was that if this worked than I needed to increase my rate of acceleration and than go back to cv mode.
This worked perfectly so now smooth curves and straight corners.
Thank you both

2

FAQs / straight corners in rhino and mach3 but radiused when I machine. Help!

« on: September 12, 2009, 08:46:12 PM »

I just switched over from using a shopbot control box to a Gecko g540 set of drivers.
Right now the software I am using is Rhino 4.0 SR6 build 09/07/09 , Madcam  4.1 build 09/08/28 and Mach3 version 3.042.029.
I am post processing with MACH-3-INCH.TXT.  This is my first experience with using Mach 3.
My problem is that at every square corner I am getting a tapered radius about 1/2 by 1/8" long .
This happens on every corner as the cutter approaches the corner.
This does not show up on the rhino drawing or the cut simulator in madcam , nor the simulator in mach 3 but is there on every piece I cut .
Any body have a clue what might be the cause of this. Here is the g code
Steve Webster