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Old 17-Aug-2013, 12:27 AM   #57
tripelo
Senior Member
 
Join Date: Jan 2010
Location: Dallas, TX
Posts: 123
Quote:
Originally Posted by Pete Higgins View Post
I’m not sure that the programmable “digital display” 3-wire rotors employ two synchronous motors (one in the control and one on the mast).
Yes, I'm not sure either.

Quote:
From what I’ve been able to gather, the control unit has a counting or “timing ckt.” that calibrates itself to the time of travel from 360 deg. to 0 deg...
The well-known Channel Master rotator and clones essentially use the synchronous motor in the control as a timer. So, it could be in newer units that a timing function is implemented in a smaller or less costly circuit.

Quote:
When it gets really badly out of sync,...I’ve had the digital display read over 40 before reaching the CW end of the rotors travel. ...

I do hear a slight hum ...that sounds like a good indoor project on these 100 deg. days.
Yes, for the curious mind there is always a project.

Seems unlikely that a timing motor would be used with a digital indicator, when a timing circuit could be smaller and probably less expensive.

I haven't used, or looked at circuits of, any of the newer digital indicator rotators, so my comments are speculation.
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