The earlier Orion rotator's had AC motors which is what I have (RC2800P-A). The
rotator has limit switches at each end of the rotation range which will
interrupt the drive voltage whether or not you release the control switch. I
don't think it is possible to "toast" one. Msquare units now have dc motors
which are an improvement. The ac motors work fine, but are a little more
vulnearable to noise which can cause it to continue rotating after you release
the control. I bought mine used about 6 years ago and it does this about twice
per year. Immediately turning off the power switch will interrupt this
erroneous operation, and then you can re-check position calibration. Re-setting
the calibration is very simple.
I believe I just read another email about someone who had a mast securing bolt
shear off. Orion/Msquare specifically recommends that you do not secure the
mast to the rotator clamp with a bolt. High torque produced by a wind gust
could destroy the rotator drive gears and ruin you rotator.
John Owens - N7TK
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