Re: Rack and pinion

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "jcc3inc" <jccinc@o...> wrote:

> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "dex367" <dexlabboy@l...>
> wrote:
>
> Dear Sir:
> We used rack and pinion exclusively in our oxyfuel and plasma shape
> cutting machines. We would spring load the pinion into the rack

with

> the resultant backlash being zero. We used 20 degree pitch angle
> gears as they ran smoother. The separating force for 20 degree
> components is tan 20 degrees or about .364 x the driving force.

Hence

> you can decide what preload you need. Most of the drive force on
> these machines was due to acceleration forces. One could use a
> lighter spring load for normal drive forces and use a rigid
> mechanical stop placed maybe .025 inches away to handle

acceleration

> only forces.
> Because we had good performance from rack and pinion, I tend to

fafor

> that means of drive.
>
> Regards,
> Jack C.
>

Dear Jack C.

That solution sounds very interesting.
Any chance you have a picture or two.

Regards,

Bill G.