NEXTAR 11 will not track - HELP!

Have a Nextrar GPS 11 but cannot get it to work correctly. In "go to" mode it can find the object punched in on the hand controller but then immediately slews in azimuth 80-90 degrees off target before stopping. During the two star alignment - each star is off target 30-40- degrees. Power supply is robust - scope appears to come pretty close to magnetic N during alignment...it just won't stop when it lands on a target. Pretty frustrating! I've sent in two inquiries to Celestron but neither has been answered. This scope is for a kid's astronomy program here at the Harvard Observatory. Would sure be nice to get it operational! Thanks for any help in getting this scope up and running. It's only been used three times out of the box.

I can tell you that I had the NS8GPS and when it was new it did strange things. I received a new one after about 3 weeks and the took it home and it also did weird slews without command or just slewed in a complete circle without stopping. It was replace with another unit which then worked perfectly.
I still do no know what the problem was exactly. But like you, it just did not slew to the object properly.

I had a similar problem just this week with my NS11. Mine would find the object, but then not track. Like you, the power pack I was using (Celestron's) was freshly charged and indicated full power. I shut down and connected to another battery pack (Radio Shack). Started up, alligned and everything worked the rest of the night.

Curious, but I have read that these are very picky about he power that they get.

Jim in Texas

I do not have the GPS Model, but have experienced a similar problem with my NexStar 8 when I have inadvertently entered the wrong date/year.

Pete