I have a Sirius EQ-G mount with the goto Synscan controller. A couple of times I wasn't able to do a star alignment but the usual problem was that I imputed wrong data. So the other night I went to my dark site about 20 miles from home and set up and attempted a 3-star alignment after polar aligning. It constantly was off by 10-15 degrees. I made several attempts at this, powering off, restarting, re-entering the data, manually moving the scope. Nothing worked. It seemed to be off by the same distance and direction everytime. I triple checked my location data and time info. Nada. Finally after wasting 2 hours of imaging time, I just manually found my targets and started imaging. It tracked fine and I got good subs. I don't autoguide.
This is my first Goto mount and have had it for only about a year. Is the Synscan the only controlling unit or is there something in the mount also? Do these Synscan controllers go wacko sometimes?
When I got back home and setup the next night, I imputed the location data for the house and everything was spot on.