RE: [CAD_CAM_EDM_DRO] Stepper motors for mill/drill & source of supply?

Yes, ball screws transmit the power much more efficiently. The figures I
remember for ball screws is something like 90% efficient. I think I have
heard acme screws are more like 30 - 40%. So, with ball screws much more of
the power is available for accelerating and decelerating the table than with
acme screws.

Tim
[Denver, CO]

> ----- Original Message -----
> Hi Dan, I have 300 oz in steppers on my mill/drill with acme
> screws and it
> seems to be working pretty good so far. I'm using a 2:1 belt reduction as
> well. Are you saying the ball screws take less power to drive even though
> they have twice the pitch? The finest pitch I've seen in ball screws is
> .2". I've been thinking about converting to ball screws to reduce the
> backlash but wasn't sure the motors would be powerful enough
> since the pitch
> would double. Which screws did you use?
>
> Joel
>
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