Experimental Physics and
Industrial Control System

Pete Jemian <[email protected]> · Tue, 01 Sep 1998 16:28:32 -0500

At 02:02 PM 9/1/98 -0700, Janet Tvedt wrote:
>JOGF and JOGR for jog forward and jog reverse.  

in response to the question:
>> Is anybody using the motor record (written by Jim Kowalkowski/Tim
>> Mooney) to drive a stepper motor continuously (i.e., give it a
>> velocity, and let it run forever)?

Er... Now wait just a minute.  That buffer (RVAL) will overflow
if the motor runs *forever* (using JOGF or JOGR).

We had an application for a stepper motor to run a sample
spinner.  To drive the stepper motor continuously,
we bypassed EPICS and connected the STEP+ and STEP-
lines going into the motor driver to SIGNAL and COMMON 
from a function generator.  Not elegant, but it worked fine.

Pete Jemian
UNICAT

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System