Luxo "How can I get the filter wheel to stay within a 180 deg range relative to the telescope?"
You cannot. It has been a known issue since the beginning. I've removed the CAA from my image train as its worse than useless - its downright dangerous if it rips the connectors out of your gear - and replaced it with a manual rotator, again.
Thanks. It's a confusing mess trying to find information on how the CAA actually works without testing it myself.
I'll take it you haven't tried using it recently with the current firmware.
I get your frustration, Luxo. I'd be pretty angry if I'd damaged anything. To be fair though, I had my share of teething issues when I first started using a 7x2" filter wheel and OAG. Heck, I even managed to tangle cords and hit tripod legs without the filter wheel when I started. Integrating any new piece of equipment has always required careful testing to ensure safe operation IME.
Not to downplay the seemingly erratic behaviour of the CAA but I'm inclined to simply add break away couplings for the camera if there's any possibility of over rotation. Similar to how I set up my mount, and other equipment, in general.
Aside from the (obviously non) mechanical zero position shifting each session, the unit has worked quite well the last couple of nights. It's stayed within the 180 deg range, although I have it setup to allow a full 360 if needed and rely on mount control around the meridian to avoid impacts with the pier.
Losing a small amount of imaging time close to the meridian to avoid filter wheel impacts is nothing compared to the benefit of being able to reliably frame multiple targets each evening.
All I need to figure out is how that "zero" position is established at the beginning of the session and I'll be golden. Surely the ASIAIR establishes the zero-position relative to something?
I'll ask the question to ZWO support directly and see if I can get an answer that way. In the meantime, it's back to weirding out my neighbours by working on my tan under the moon and stars.
Clear skies.
