Messages

1

General Mach Discussion / Re: Non-linear motion/acceleration profiles?

« on: April 13, 2010, 11:40:28 PM »

That's fantastic! Unfortunately I can't figure out where Tempest can be downloaded. EDIT: No, wait, I got it. Post #55 in the linked-to thread seems to have the latest version.

2

General Mach Discussion / Non-linear motion/acceleration profiles?

« on: April 13, 2010, 01:32:35 PM »

I would like to set up Mach3 to use a third-order (or higher) motion profile. Basically, this ramps up acceleration slowly instead of instantly. This is important to minimize jerk (a technical term) and vibration.

Some background info that might explain it better: http://en.wikipedia.org/wiki/Jerk_(physics)

Are there any plugins written that will change the default motion profile, or can I write one? Without accounting for jerk (and even higher-order derivatives), you cannot have smooth, vibration-free motion. Instantly changing acceleration means instantly changing the forces affecting the CNC, which is not good.