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<== Date ==> <== Thread ==>

Subject: How to home translation stage with no encoder/home-switches using motorOmsAsyn
From: Marvin Noll via Tech-talk <tech-talk at aps.anl.gov>
To: <tech-talk at aps.anl.gov>
Date: Thu, 22 Jan 2026 16:35:12 +0100
Dear all,

we are using OMS MAXnet controllers with the motorOmsAsyn ioc.

The stepper motors move translation states, which are only equipped with limit switches at the end (so no encoders or home-switches).
What is the intended procedure to home the stage in this case?

I would expect something like:
1) Stage is at some unknown position
2) Do HomeR
3) Stage moves into lower limit switch
4) VAL/DVAL/RVAL report some value
5) Reset VAL or DVAL or RVAL to 0 (without moving the motor of course)

Many thanks in advance
Marvin


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