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

Subject: Re: Epics Motor Record Encoder Sense
From: "Stubbs, Scott A." <sstubbs@slac.stanford.edu>
To: Žiga Oven <ziga.oven@cosylab.com>
Cc: "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
Date: Mon, 23 Oct 2017 22:21:25 +0000
Hi Wolfgang et al,

This is a pretty common issue.  At LCLS we use a custom version of the motor record that doesn’t support negative ERES, and neither do our ’smart' motors, so we usually have to fix it in hardware as Mark said.  As a rule, if you can make sure to keep the phases consistent from the beginning, that is the way to go and prevents problems down the road.  Just my two cents.

Best regards,
Scott

---
Scott Stubbs
LCLS Controls & Data Systems
sstubbs@slac.stanford.edu




On 23 Oct 2017, at 9:09 am, Žiga Oven <ziga.oven@cosylab.com> wrote:

Hallo,

I am new in epics motor record control and try to configure my first axis with encoder. I am now in trouble with an linear axis with encoder Pro (dex Maxnet Controller). Without encoder. the axis works fine. I activated encoder read out by adding PSE to the init string, UEIP to yes and ERES to 5e-5, then the RBV field changes negative by the correct absolute value, when I move positive with TWF .1. I tried to set ERES negative to -5e-5 without any effect. Has somebody an idea how to change the sense of the encoder readout?

Thank you very much
   Wolfgang




References:
Epics Motor Record Encoder Sense Mexner, Wolfgang (IBPT)
RE: Epics Motor Record Encoder Sense Mark Rivers
Re: Epics Motor Record Encoder Sense Žiga Oven

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