re: RE: EMC and leadscrew compensation

Jon,

Nice post!

One question.
Assuming the hole is truly round with 4 "divots" where we "dwelled"
during B/L comp, why is this unsuitable for a bearing?

TIA (for those who don't know, Thanks In Advance)

Ballendo

>This has nothing to do with it. EMC has lookahead, and the
>backlash compensation is handled on a step-by-step basis for stepper
>drives, and a servo cycle basis for servos. But, it takes FINITE
>time to get from one side of the backlash to the other,<snip> I have
>about .001" backlash, and I can feel and see that bump. it isn't
>big, but its there. It would not make a good fit for a bearing,
>for instance. Jon