Re: Need help to decide what rack and pinion to use in a 6'x10' table

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Hector"
<hector_a_quintanilla@...> wrote:

>
> Hi, folks, thanks for the replyes,
> Ballendo,
> I see you mention you are using steppers, in my case i want to use
> servos.I dont realize if you have to take different aspects into
> account in the decision of what rack and pinion if your are using
> seros or steppers. To make it clear does it matter what kind of
> motors are you using in the rack & pinion decision?
>

A follow-up question I have is about where to put encoders.

if you have a motor on a first stage belt, then a second stage, and a
final and third stage, assume all are 3:1, would it be advisable to
put it on the jackshaft of the first stage instead of the motor ?

Dave