Re: [CAD_CAM_EDM_DRO] Backlash on acme leadscrew

In a message dated 11-Jan-02 22:34:49 Central Standard Time,
rjshaw@... writes:

> Do the 'square-thread' leadscrews such as at http://www.cnckits.com
> have much backlash?>>

Don't know. Never saw those.

Does the 'spring between two nuts' trick work> well to get rid of backlash

> on these?
>

Yes. That's the whole point of that. But it DOES increase required torque
to turn the screw a tad. The steppers (or servo, if you are uppity!) should
be somewhat larger than just-enough to move the quill about (so they can
handle the friction as well).

Lotsa luck! Jan Rowland


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