Dec Motor Controller Trip

Tuesday, April 24, 2018 12:26 PM

Problem(s) Encountered:

I got telescope slewing error. Then, I try to point the telescope to reset.. But, it cannot point either. I try to home Dec and Ra for the telescope,

Then got the error:  ERROR where m_dec not homed . Moving the telescope using the Paddle also failed. I gave up the observation.


The dec motor controller had tripped.  Resetting it and homing telescope axes corrected the issue.

This is a “darned if you do, darned if you don’t situation”.  In order to try to eliminate wind shake, I have to tighten dec-axis preload.  But this causes added tension in the gear train, resulting in higher current draw,which results in the controller tripping.  The key is to find the sweat spot somewhere in the middle.

Be aware as well that I am currently working on setting up system to allow for the dec motor controller to be reset remotely.  I’ve got cable run but still need to wire things and then interface to the controller.  It’s a bit of a ways out, but on the horizon.