Re: [CAD_CAM_EDM_DRO] How to establish repeatable home position w/steppers?

Many Commercial machines use magnetic PD's, They are very repeatable

P.J. Ritz

----- Original Message -----
From: <dougrasmussen@...>
To: <CAD_CAM_EDM_DRO@egroups.com>
Sent: Sunday, August 27, 2000 1:00 PM
Subject: [CAD_CAM_EDM_DRO] How to establish repeatable home position
w/steppers?


> Group,
>
> On an open loop stepper system how do you establish a repeatable home
> position? I'm thinking of a home position that will repeat to within
> the resolution of the machine.
>
> I can't see that normal, every day limit switches will do the job.
> Dial indicators would be a pain, but would work provided they didn't
> get bumped or readjusted. Some very old machines used a vernier dial
> which was manually stepped to position.
>
> So, what method are most of you using?
>
> thanks,
>
> Doug
>
>
>
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