Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: halkintool on January 08, 2009, 04:56:13 PM

Title: Is Mach limited to a certain speed for processing G-code?
Post by: halkintool on January 08, 2009, 04:56:13 PM

I tried running a program that cut out lettering about 6" tall. I tried to increase the speed to 200IPM to test out the machine and it ran through all the letters are the correct speed except the "C's".  The feedrate slowed to 50ipm while it went through the code. Is there a way to speed this up? I noticed it would iterpolate a circle at fully speed, but when its plowing through tons of G-code to generate a profile it slows right down. Normal?

Edit. Noted, i tried running the program online and offline and it slowed in both situations.

Title: Re: Is Mach limited to a certain speed for processing G-code?
Post by: Hood on January 08, 2009, 06:15:21 PM

Sounds like your C's may be made up of lots of small lines and as such the accel/decel of your motor is not allowing the feedrate to get up to speed, see if you are in CV mode as that may help.
Hood

Title: Re: Is Mach limited to a certain speed for processing G-code?
Post by: halkintool on January 08, 2009, 06:47:53 PM

Thanks, will do.

Title: Re: Is Mach limited to a certain speed for processing G-code?
Post by: halkintool on January 09, 2009, 11:29:46 AM

Machine was in CV mode, but increasing the accell on the motors helped.

Thanks again.