Experimental Physics and
Industrial Control System

[email protected] (Hubert Yamada) · Tue, 3 Dec 1996 10:23:06 -1000

I have two problems with the steppermotor record / OMS driver. 

First:  It provides no direct control over the AUX line.  It always
enables the line before initiating a move, and disables it after the
move is complete.  This is desirable behavior under normal operating
conditions; however, it causes problems for me during my initial
calibration procedure.  I need to be able to leave the AUX line enabled
for an extended sequence of calibration operations, and return it to
its normal operating mode after calibration is complete.

Second:  As far as I can tell, it provides no way to set the velocity
profile (other than the acceleration).  Specifically, I would like to
be able to set the OMS base velocity.

I believe that I will need to modify the record and driver to provide
this support.  Is this correct, or am I overlooking something?  Has
someone else already done one or both of these?  If I do make the
changes, who do I contact to get the changes merged with the standard
release?

As an alternative, I have been given a 'motor' record, written by Jim
Kowalkowski and Joe Sullivan.  It provides the second function that I
need.  I would still need to add the first function.  Has anyone had
experience with this record?  Are there any special problems with it?
Is there a reason why this record is not part of the standard EPICS
release (I'm using release 3.12.2, with Gemini modifications)?

Any information would be appreciated.

-- 
Hubert Yamada, University of Hawaii, Institute for Astronomy
 phone: (808) 956-6648                 
e-mail: [email protected]
   WWW: http://ccd.ifa.hawaii.edu/~yamada/

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System