Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: msimpson on November 19, 2010, 05:42:17 AM

Title: Rounded corners with low acceleration
Post by: msimpson on November 19, 2010, 05:42:17 AM

If I set my accelration down low I get a smooth operation but I also get rounded corrners.   Its like Mach3 starts the next line of Gcode be for the thing as stopped.  Am I missing something?

Title: Re: Rounded corners with low acceleration
Post by: Hood on November 19, 2010, 06:07:33 AM

You are using Constant Velocity so Mach will blend moves, if you have slow acceleration you will get rounding. There are settings on General Config page that can stop CV on angles greater than whatever you set.  You may find however that Exact Stop mode works fine for you, you can set that by removing the G64 from your code (if there is a G64) and replace it or put in a G61.

Hood

Title: Re: Rounded corners with low acceleration
Post by: derekbpcnc on November 19, 2010, 12:27:13 PM

I always write the code to roll the cutter round a corner.
This produces a more accurate path and is alot less stressful on the mechanical components like leadscrews . motors etc.