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Author Topic: Backlash Compensation question...  (Read 5654 times)

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Offline budman68

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Re: Backlash Compensation question...
« Reply #10 on: November 01, 2008, 06:07:47 PM »
Yep, Joe, that would be waaaaay above me, my friend -  :D

Hood, no change on the home switches so that's out.

Well, when I posted this yesterday, I was  at .005 seconds shuttle speed and 100% B.L. speed.

Today I actually went up to .050 and no RESET this time and I didn't even slow down the feedrate.

I will be doing some more testing but so far, so good, and thanks again for the suggestions-

Dave
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Offline Graham Waterworth

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Re: Backlash Compensation question...
« Reply #11 on: November 02, 2008, 08:40:35 AM »
Jim,

I can only see your theory working if the encode is mounted to the slide and not the motor, if the encoder is on the motor then there is no backlash between the encoder and the motor unless the encoder is slipping on the motor shaft.

Dave,

if you have more than .001" backlash then you need to fix the machine mechanics, if its so bad then cutter pull will spoil any job you try to do. You will get tools snatching the work and this is never good.

Just my view.

Graham
 
Never give up, time will pass, the cloud will clear, the sun will shine once more.

Offline budman68

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Re: Backlash Compensation question...
« Reply #12 on: November 02, 2008, 08:44:23 AM »
Quote
Dave,

if you have more than .001" backlash then you need to fix the machine mechanics, if its so bad then cutter pull will spoil any job you try to do. You will get tools snatching the work and this is never good.

Just my view.

Graham

Agreed, my friend but at that moment, I was in the middle of a good size job and I didn't want to break it down and tighten up the gibs just then.

That's why I thought I'd try out the backlash feature, which worked very well.......... after I got it dialed in.  :D

I normally never use Backplash comp and I will now have to take a moment and pull the tables and tighten it up a bit.

Thanks as always Graham-
Dave
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Just because I'm a Global Moderator, don't assume that I know anything !

Dave->    ;)

Offline Graham Waterworth

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Re: Backlash Compensation question...
« Reply #13 on: November 02, 2008, 08:51:16 AM »
No problem  :)

Graham
Never give up, time will pass, the cloud will clear, the sun will shine once more.