> And that's what I SIMPLY don't understand.  I have two servo-controlled
> machines.
>
> Jon

Jon,

  EMC adds the screw compensation to the measured value from the
encoder before it is interpreted as actual joint position.  Therefore,
if I want to use screw comp and scale feedback at the same time, it
wont work.

  If you have any further doubt as to how EMC works, you should
investigate HAL for yourself, to avoid any further assumption.

Dave,

  When using a screw comp table, backlash correction is incorporated
by default.  It is the difference between the forward and reverse
screw maps.

Brian

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