Problem(s) Encountered:

When I clicked  dome->enable doe tracking->apply , there was an error dome axis=m_az fatal following error . It didn't influenced the observation, but when Itry to home the dome, I got another error dome m_az not homed .

Solution:

I was able to move the dome by using the “dome left/right” control.  But it seemed slower than usual for some reason.  Still, I got it to HOME and was able to close the dropleaf/shutter.  With the dome closed, I tested dome motions further and experienced more issues.  Initially, it would move, but extremely slowly—on he order of perhaps a cm/minute.  Then motion just stopped completely.  Pulled the motors and verified that the dome could be moved by hand.  Checked voltages to the motors, which are 3-phase.  Each leg shows ~182V, which seemed odd to me.  I contacted Treffers and he believes that they should be at 208V per leg, which sounds more reasonable to me.  So he and I are both currently leaning towards a failure with the VFD motor controller (ACS50-01E-02A2-1).  Of course I cannot find them, but I think I have found an equivalent (ACS55-01E-02A2-1).  Regardless, I’m “waiting on parts” on this one so unfortunately for the time being, the 1.3m is off-sky indefinitely.

Update:  1.3m dome azimuth motion:  I got the new VFD motor controller over the weekend and installed it yesterday.  It was ordered according to the drawings.  Once installed, it still did not work.  Doing some tracing, I noted that the feed to the controller was 110V (I was expecting 220V).  Checking the box that had theoretically failed, it indeed was a model designed for a 110V feed, contrary to the drawings.  I checked with Dick Treffers, who was just as confused at this as I was.  So I started tracing the wiring for the system and found that the second feed wire had been moved to a common bus, leaving the second leg of the 3-phase power feeding nothing at all.  Verifying once more with Treffers, the wiring should have been routed, as shown in the drawings, through this second leg.  So I changed the wiring for the feed to the controller to once again match the drawings and provide the 220V feed that this new controller, as denoted in the drawings, expected.  This corrected the dome issue.I’m not sure what happened in the past but my theory is that at some point, the original controller had failed and a new one was purchased.  For whatever reason, the new one at that time was 110V, so the system was modified to accommodate on-the-fly, but wasn’t documented.  Now, the system is back to how it was designed and more importantly, how the drawings are reflected.