[amsat-bb] Re: G5400B calibration problems

2014-01-26 Thread Greg D.
It sounds to me like something is binding. These rotors run at 1 RPM; you could try running it for 30 seconds and verify that it moves 180 degrees. Then the same in reverse. If the motion is correct, then the pot is probably bad. If not, then check for anything that might keep the whole kit

[amsat-bb] Re: G5400B calibration problems

2014-01-26 Thread Joe Leikhim
Tim; I believe there are two pots each for the azimuth and elevation meter adjustments. One pair are for the internal meters, the other pair for 0-5V to be used by the TrakBox (or similar) ADC. Make sure you turned the correct pair. However first I would make sure the internal 7806 voltage

[amsat-bb] Re: G5400B calibration problems

2014-01-25 Thread Lizeth Norman
Tim, A few possibilities exist. 1. The rotator is mechanically hosed. This includes the pot mounting an gears and stuff inside that drive the pot. IIRC the 5400b has no mechanical stops and relies on fuses to protect the windings of the motors. You can check this by moving the rotator and looking