[TowerTalk] OR2800 rotor issue

[k2wd at comcast.net]

Good afternoon,

I installed an OR2800 dc rotor yesterday, and ran into a few issues.

After performing the calibration routine, I tried to rotate the rotor one full 360 degree rotation. However, the rotor would always stop at 95 degrees, or thereabouts, even after multiple recalibration attempts. More interestingly, each time I got to 95 on the controller, the outside array would be anywhere from 35 to 70 degrees in position.

If I waited 30 seconds and then tried to hit the CW button again, it would sit at 95, then display error message E1.

I then took the controller out from the shack to the base of the tower, thus reducing the control cable length in half and removing the lightning suppression equipment.  Same results. Cable is the wireman cable designed for this rotor. (#302 or 306, I forget) 100ft from the rotor to the supression panel, then another 105ft to the shack.

Frustrated, I reconnected everything as before and put the controller back in the shack. After taking a break, I came back to the shack.  For some reason, this time I thought about lowering the speed setting from 9 to 4.  Then, miraculously, I was able to rotate the rotor completely around (360+). Repeatedly with success!

Therefore, it appears that for some reason, at high speeds the controller and rotor are loosing sync. I can understand if the controller gets corrupted pulse data, but why does it always stop at 95? And be at different positions outside?

Could there be a voltage drop in the long cable length that is more pronounced at the higher speeds? Thus causing the controller to stop?

Anyone else see this condition?

Thanks
Eric
K2CB
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