Re: EMC-backlash compensation

Dan,

That is a question I have. It looked like I was getting the same results as
you are. I had a dial indicator on an axis and I kept trying increasing
amounts of backlash compensation and it appeared that nothing happened.
Finally I just stuck in .100 just to see if anything would happen and what I
started to see was some compensation, but it was not .100 worth and to make
it even stranger if I jogged the axis .100 it would move .100 + some amount
I don't remember and it would move .100 + the extra amount each time I
jogged in the same direction. Yes, it just kept adding the compensation to
each move every time instead of adding it just when the axis changed
direction.

I want to check it out with g-code program and see if the results are any
different when processing code than when making manual moves, but I have not
had the chance. I would love to hear any updates if you play with the
backlash any more.


Tim
[Denver, CO]

> -----Original Message-----
> From: Dan Falck [mailto:dfalck@...]
> Sent: Monday, June 21, 1999 10:10 PM
> To: CAD_CAM_EDM_DRO@onelist.com
> Subject: [CAD_CAM_EDM_DRO] EMC-backlash compensation
>
>
> From: Dan Falck <dfalck@...>
>
> Here's an EMC question for the more experienced ones- does the backlash
> compensation really work? I can't seem to get it to do anything for my Z
> axis. I put a dial on the axis, get 0.004" of backlash, go into
> stepper.ini , go to AXIS 2 and change backlash to .004- then nothing
> changes. I put in a negative sign, put in a larger value and
> still nothing
> changes.
> I assume that AXIS 2 is the Z axis. Please correct me if I'm wrong.
> By the way, I'm happy as can be just to have 0.004" backlash in the tired
> old mill/drill. The ballscrew did wonders for it and it runs as fast as
> the table too.
>
> Thanks,
> Dan Falck
>
>
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