Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: 01sporty on March 27, 2007, 06:11:27 PM

Title: Version 061 Backlash Comp Problem
Post by: 01sporty on March 27, 2007, 06:11:27 PM

I tried installing version .061 today.  I got a very strange behavior with backlash comp turned on.  Any axis with backlash comp on would accelerate to normal, immediately decelerate way down, then accelerate back to normal.  This behavior only occurs on direction reversal.  That is, if I made two moves in the same direction, only the first move would have the strange behavior.  The second move would be normal.

I'm attaching a copy of my XML if that helps.

Regards,
Walt

Title: Re: Version 061 Backlash Comp Problem
Post by: Brian Barker on March 28, 2007, 06:10:07 AM

It is the accel time that is the problem... Change you shuttle Acceleration time in the General Configs and see if that helps. You need to have the moves ramped or you are going to have lost steps :(

Title: Re: Version 061 Backlash Comp Problem
Post by: zoltan on March 28, 2007, 09:05:16 AM

I have and had the same problem from version 51, and I do not know how to setup the values for shuttle acceleration. What is the rule, please?

Thank you.

Zoltan

Title: Re: Version 061 Backlash Comp Problem
Post by: Brian Barker on March 28, 2007, 09:16:14 AM

This is the time that it will take the axis to slowdown  so just keep changing it till you are happy with the how it works

Title: Re: Version 061 Backlash Comp Problem
Post by: 01sporty on March 28, 2007, 10:32:50 PM

That did it. 
Thanks Brian, I never would have found that one by myself.
Regards,
Walt