Re: [CAD_CAM_EDM_DRO] Re: DRO encoders- Rotary or Linear?

Check out the "Shooting Star" DRO's. They use a
(plastic-loom, covered) rack, driving a pinion, coupled to
an encoder, and are very reliably, and pretty accurate, as
long as you mount them properly.

RayHex

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> From: John A. McFadden <mcfadden@...>
>
> Instead of using a rack and pinion, would it be possible

to use a rigid bar

> (like 1" or 1.5" drill rod) and a rubber roller mounted

to a rotary encoder?

> With a solid bar, wipes could be used to clear the

surface before the roller

> passed over it, unlike the rack and pinion where clearing

it would be a

> difficult measure at best if something were to get in the

teeth.