CAD CAM EDM DRO - Yahoo Group Archive

Re: linear velocity from encoder

Posted by Jon Elson
on 2000-11-29 22:01:39 UTC
Mariss Freimanis wrote:

> --- In CAD_CAM_EDM_DRO@egroups.com, Jon Elson <jmelson@a...> wrote:
> >
> > HMMMMM! Now, that's an interesting thought! Wow! A derived tach
> with
> > more bandwidth than the encoder!
> >
> > Jon
>
> Hi,
>
> None the less, there it is. The laser spot on the wall smoothly
> progressing with nary a jiggle or step at 0.1 degrees per minute.
> Bounced from a mirror on a motor mounted with a 100 line encoder. I
> can show you how I did it.

Well, if you can set up a gizmo to do this and produce digital encoder
outputs for the CNC control, you may have finally put the nail in the
coffin of my DC tachs! Of course, we need some encoders that have
the linear outputs. I happen to have some HP specials (QEDS-7163)
that have linear outputs in addition to the digital. They have sleeve
bearings and low resolution, though, and are made for panel knobs,
not machine position feedback.

Certainly a great idea! You really don't need to show me, as soon as
you mentioned it, I knew about how you did it!

Jon

Discussion Thread

Jon Elson 2000-11-29 22:01:39 UTC Re: linear velocity from encoder