Problem(s) Encountered:

The focus would not move while trying to focus on a bright star in evening twilight. Tried restarting the TCS control program and (eventually) cycling the motor drivers on and off, but nothing worked.  Emailed Damon from DFM and he got on remotely to try to diagnose the problem; as far as he could tell, the motor was spinning but the secondary wasn''t moving, suggesting a mechanical issue.  Did not affect observations much since the

focus was stuck not far from the correct value.  Direct images would have been compromised worse.

Solutions:

This is exactly like the first failure we had with focus not responding, but the motor apparently saying it was turning (implication of a broken belt).  Not sure what to say about this but it really still seems like some software oddity.  I just can’t explain away why it appears that the counts on the motor are changing.  Regardless, after sitting for a spell, focus “just works” again.