Experimental Physics and
Industrial Control System

[email protected] (Tim Mooney) · Fri, 27 Mar 1998 12:27:32 -0600

re...

> I tried it and Tim's 5/29 modification does not correct the premature
> stopping problem. I don't think it is a timing problem either. I
> slowed the motor polling task's scan rate down to once a second and
> that first RP always returns the previous moves direction.

The modification affects only motors *using* encoder (or readback-link)
feedback.  Janet's hardware has encoder support, but it's not being used, so
midcourse corrections would be done even with the current version of the
motor record.

I should mention that glitches on the limit-switch lines can produce
very similar behavior, and are by **far** the more common cause of it.
So don't everybody with an intermittently jerky motor immediately assume
their hardware is flakey.  You might just need some decoupling capacitors.

Tim

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System