Please do not move this to the equipment forum. This is intended for the imaging community.
With that said, I have some really good news for people that have either bought the Celestron Focus Motor, or those that plan to. The first iteration of the ASCOM driver had a big problem with exceptions being thrown, the driver going comatose, and it largely being unusable for imaging. On 3/22, after I opened a support ticket and worked with Celestron on the problem, they released a new ASCOM Driver, that I am happy to have tested tonight. The new driver is working wonderfully. I ran a full Voyager V Curve, with absolutely no problems on my RASA 8 F2 scope. For those not familiar with Voyager (or FocusMax for that matter) the V Curve action runs on a single very bright star, and uses very short exposures and thus very fast movements of the focusing motor, and completely models the focuser throughout various movement sizes, etc. With the release driver I would get about 25% through a curve build and get nothing but ASCOM Exceptions. With the 3/22 release driver all of those problems are gone.
Not only does it build a curve well, it focuses the RASA 8 at F2, perfectly. There is some slight amount of shift in the star images that is present, far less than before, so that is something to be aware of. So far though, this evening, the Celestron Focusing Motor, is working great. While I had a ton of reservations about this motor and its accuracy; I would now move this piece of gear, from an imaging perspective, into the realm of highly recommended for those with Celestron Telescopes it is compatible with (sorry 9.25" owners).
So in closing if you bought one and tossed it on the junk pile, pick it off and get the new driver. If you were on the fence about this focuser, it seems to be working very, very well now!
Edited by rockstarbill, 25 March 2019 - 03:06 AM.