Messages

91

General Mach Discussion / Re: Those pesky circles

« on: August 31, 2006, 04:02:20 PM »

Will do Hood, thanks.
I did read this or a similar method in previous posts. I guess was hoping for an easier answer, but I'm on it now.

Jim

92

General Mach Discussion / Re: Those pesky circles

« on: August 31, 2006, 03:20:19 PM »

Thanks for reply Hood.
Yes it does show up more on small things, so..it could be backlash, as you say.
I saw something (i am on Mach 2 by the way) a tickbox for backlash on or off, but when checked I started losing steps badly. I always wondered how you could tell by listening if steps were being lost. I guess it's that momentary low groan before the weeeeeeeee

Is it possible to tell from the shape of the circle where the slackness lies? they seem taller on the left than they should be so...the slackness must be in the drive from left to right not kicking in fast enough, because of some play or looseness.

Am I thinking about this right?

thanks again.. it helps loads to have someone else thinking about it.

Jim

93

General Mach Discussion / Those pesky circles

« on: August 31, 2006, 12:33:47 PM »

The new forum is much better, the advice is still the same.- excellent

More used to large non critical work, I have been able to live with the error/s shown in the photo, but now I need to sort them. As well as the obvious, I seem to be missing steps, in that after travelling left to right,and back again, for say 100mm, I am 2mm short....and you guys work in thou.. The other axes seem ok.

Where do I start in my search for a cure.. well after reading  previous posts, trying a bunch of stuff, and getting confused, that is...

thanks in advance

Jim