Re: Solid coupler from motor to ball screw?

Check the specs on the motors bearings. I am using only one bearing
set at the far end, and the bearings of the motor for the near end.
That eleminates quite a bit of the problem.

Dave

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@p...> wrote:
>
>
> kdoney_63021 wrote:
>
> >I have precise alignment from the servos I am mounting on a cnc
> >router to the ball screws. I will be directly connecting the ball
> >screws to the motors with no gearing. Are there any problems with
> >turning a solid metal coupler on my lathe or should I stick with
the
> >adjustable couplers for sale commercially.
> >
> >
> Well, if you can get the height of the motor on its mounting
exactly
> matched to
> the shaft, then you can tighten the shaft coupling first, then bolt
the
> motor in
> place while the shaft holds it aligned. But, this is not accepted
> practice, as it
> almost always ends up putting excessive radial thrust on the
motor's
> bearings.
> Helical-slit couplers are the most desirable sort, but some
resilient
> couplers
> can work for a long time before the resilient piece starts to wear
out.
>
> Jon