Last night, I started getting huge RA spikes in my guiding every 5 minutes which is the period of the RA worm gear. I was concerned that the worm gear got damaged but did not know how that could have happened. I am very careful with it. Today I opened it up, cleaned the worm and re-greased. No obvious damage or debris. Tonight, did a quick polar alignment and without being cooled down properly I was back to my typical 0.40 to 0.50" total RMS. It must have been debris in the worm. The RA looks very smooth now. I may do a clean and re-grease as annual maintenance now. (Mount is 2 yrs old). Anyway, big relief that everything is ok.
Edited by bosh60, 24 September 2020 - 09:55 PM.