Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: wawatobi on February 07, 2010, 04:51:40 PM

Title: machine drags when backlash compensation turned on.
Post by: wawatobi on February 07, 2010, 04:51:40 PM

I just installed a new version of mach3 mill and my mill drags every time it reverses direction. I tried imputing different percentages of full speed but
didn't see much difference. Anyone have a solution for this.
Thanks
Wawatobi

Title: Re: machine drags when backlash compensation turned on.
Post by: ger21 on February 07, 2010, 05:21:00 PM

I think it has to do with the shuttle accel, but I don't know where you need to set it. This might help.

http://www.youtube.com/user/hossmachine#p/u/80/A27nOkTFYDY

Title: Re: machine drags when backlash compensation turned on.
Post by: RICH on February 07, 2010, 05:50:48 PM

Good post Gerry....

 I use 50% and a shuttle of .005 and the backlash is rather hard, by that i mean almost instantaneous.

I suggest one play with the settings starting with 50% ( i don't like 100%, but that's my nickle on it ) and say shuttle of .5, then .05, then .005 to see the differences. Then up the % to say 75%, and again to 100% with the the different shuttles.
BTW, you may want to see the same affects when using exact stop and constant velocity. been a while since i played with the compensation.

RICH

Title: Re: machine drags when backlash compensation turned on.
Post by: RICH on February 07, 2010, 05:55:55 PM

Here are two threads that you may want to take a look at for info that was posted before.
50-50-50 rule :)

http://www.machsupport.com/forum/index.php/topic,12143.msg77968/topicseen.html#msg77968
http://www.machsupport.com/forum/index.php/topic,12736.msg83248/topicseen.html#msg83248

RICH