Experimental Physics and
Industrial Control System

Mark Rivers <[email protected]> · Thu, 15 Mar 2018 16:48:38 +0000

Does you motor actually have an encoder?  If not don't worry about ERES or UEIP, and just set MRES to 1/(steps per engineering unit).

> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On Behalf
> Of Kevin Peterson
> Sent: Thursday, March 15, 2018 11:43 AM
> To: Sobhani, Bayan <[email protected]>; [email protected]
> Subject: Re: Motor Record not moving distances less than .5
> 
> My replies are below.
> 
> On 03/15/2018 09:59 AM, Sobhani, Bayan wrote:
> > UEIP, MRES, and ERES were:
> >
> > UEIP: "No"
> > MRES: 1
> > ERES: 1
> >
> 
> With this configuration you will be unable to make any move smaller than
> 1, since that is the value of MRES.
> 
> > If I try setting UEIP to "Yes", it does not get set and the value remains "No". If I try
> setting ERES to .1, and then setting UEIP to "Yes", I get the following error message:
> >
> > Illegal choice PV: alexHost:testMotor2.UEIP error detected in routine:
> dbFastLinkConv(cvt_st_menu)
> >
> 
> Some motor controllers don't support encoders, which might result in the
> UEIP value being forced to "No," but that doesn't look like what is
> happening here.
> 
> Which client is being used to change the UEIP value?
> 
> What happens if you do a caput from the command line?
> 
>    $ caput alexHost:testMotor2.UEIP "Yes"
> 
> > Alex
> 
> Kevin

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System