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Author Topic: Hy-Gain Tailtwister rotor won't turn clockwise  (Read 281 times)

KE4YD

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Hy-Gain Tailtwister rotor won't turn clockwise
« on: February 23, 2023, 09:57:26 AM »
My Hy-Gain Tailtwister suddenly stopped turning clockwise. It turns counter clockwise just fine, but is currently at 225 degrees and that's as far clockwise  as it will go. The DCU-2 controller sends the code motor.
Any ideas where to check first? I know it is possible to check the rotor from the ground, but not sure where to begin.
Thanks for any help you can give.
73,
David  KE4YD
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K1KIM

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Re: Hy-Gain Tailtwister rotor won't turn clockwise
« Reply #1 on: February 23, 2023, 10:18:49 AM »
Most rotator motors change direction by reversing the DC polarity. I'm not familiar with your specific controller, but perhaps start there and see if that's happening.
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W1BR

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Re: Hy-Gain Tailtwister rotor won't turn clockwise
« Reply #2 on: February 23, 2023, 10:47:35 AM »
Quote from: KE4YD on February 23, 2023, 09:57:26 AM
My Hy-Gain Tailtwister suddenly stopped turning clockwise. It turns counter clockwise just fine, but is currently at 225 degrees and that's as far clockwise  as it will go. The DCU-2 controller sends the code motor.
Any ideas where to check first? I know it is possible to check the rotor from the ground, but not sure where to begin.
Thanks for any help you can give.
73,
David  KE4YD

Resistance measurements are given the manual.  It could be a limit switch problem in the rotator, but with the basics first. 
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WA9AFM

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Re: Hy-Gain Tailtwister rotor won't turn clockwise
« Reply #3 on: February 23, 2023, 11:32:33 AM »
If you know someone who also has a 'Tailtwister', ask to borrow their controller.  This would determine if the problem is in the rotor or the controller.
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W1VT

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Re: Hy-Gain Tailtwister rotor won't turn clockwise
« Reply #4 on: February 23, 2023, 12:24:29 PM »
https://www.w2aee.columbia.edu/sites/default/files/content/manuals/T2X_T2XX.pdf

Table 2 provides on the ground resistances to measure.
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VE3LZQ

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Re: Hy-Gain Tailtwister rotor won't turn clockwise
« Reply #5 on: February 23, 2023, 02:11:32 PM »
One of the wires disconnected at the rotor or control .Rotor will turn to end a stop
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W9FR

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Re: Hy-Gain Tailtwister rotor won't turn clockwise
« Reply #6 on: February 23, 2023, 05:43:54 PM »
Has anyone watched the antenna actually stop at 225 degrees?  It could continue to rotate and the sending variable resistor fails beyond that spot.  Just a thought…it has happened to me.  Good luck on fixing it. 73, Noel, W9FR

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K0RS

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Re: Hy-Gain Tailtwister rotor won't turn clockwise
« Reply #7 on: February 23, 2023, 08:21:12 PM »
Bet dollars to donuts it's a fractured ring gear and not an electrical problem.
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KE4YD

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Re: Hy-Gain Tailtwister rotor won't turn clockwise
« Reply #8 on: February 24, 2023, 12:38:38 PM »
yes, the rotor will turn counter clockwise but not clockwise. If I continue to turn it CCW it will eventually be pointed due south then it will be stuck there, as there is no turning it back. Turns in one direction but not the other and it is currently at 225 degrees, so not a faulty pointer or such.
I am believing it is in the rotor itself and not any electrical connections.
Guess it's time to go up the tower.
Thanks for all the ideas.
73,
David  KE4YD
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