Re: [CAD_CAM_EDM_DRO] CNC, DRO's and backlash
Posted by
Marshall Pharoah
on 2000-03-24 03:55:40 UTC
I would guess that compensation for backlash after the axis has started moving
is not really needed. However, it might be useful for compensating for leadscrew wear.
Some of the smaller machines, like the Sherlines, don't use ballscrews. And on some
of the larger conversions, the ballscrews come later, if at all.
Marshall
is not really needed. However, it might be useful for compensating for leadscrew wear.
Some of the smaller machines, like the Sherlines, don't use ballscrews. And on some
of the larger conversions, the ballscrews come later, if at all.
Marshall
----- Original Message -----
From: Ken Lowther <lowther@...>
To: CAD_ CAM list <CAD_CAM_EDM_DRO@onelist.com>
Sent: Thursday, March 23, 2000 4:52 PM
Subject: [CAD_CAM_EDM_DRO] CNC, DRO's and backlash
> I've been thinking about some of what was said about using DRO feedback
> to compensate for backlash during axis reversal. While maybe not
> optimal, do you really NEED to measure anything except when the axis
> starts moving in the desired direction. The software already knows when
> the axis reverses and I understand some software lets you enter a value
> for backlash. So you are left just needing to know when it actually
> starts to move in the desired direction.
>
> Basically, just enough to make sure the software and hardware is in
> sync.
>
> --
> Ken Lowther
> Youngstown, Ohio
> http://www.atmsite.org
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