CGEM-DX Index Marks Idea and Electronics Help
Posted 27 August 2013 - 08:10 PM
I've been here for years and can tell you that there are some extremely intelligent folks here, so let me run an idea by you electronics guru's.
I finally pier mounted my CGEM-DX. I just have it covered up out in the yard with a 365. Now I don't leave any scope on it so every time I want to image I have to re-mount and re-balance. Obviously I always lose my alignment because of this since the mount has no switches like my old CGE, and the index marks on the DX are a joke.
My idea is that I would like to somehow install some type of potentiometer, hall sensor, or the like, to accurately show the exact position the mount was in after a hibernation command. I was looking at some products from Spectra Symbol and the prices look reasonable.
So, what do you guys think? Am I off my rocker, or does it sound feasible?
Posted 28 August 2013 - 06:44 AM
I wonder why Synta/Celestron haven't implemented it in their new mounts.
Posted 28 August 2013 - 06:52 AM
I think it's a good idea. You may be able to do well just with a well-printed vernier scale. The trick is getting it to the right physical angle and stopping it, and you could manually use the slow motion control to get it right, by watching, slowly and carefully - and then turn the mount off or whatever.
It just needs to be set to the place it was after the last alignment.
A more sophisticated thing would be like the cge switches that actually stop the motor once it hits the spot. It all seems doable with some effort, but a good vernier might work well and be simpler.
Either way- I think it's a good way to go.
Posted 28 August 2013 - 07:55 AM
Posted 28 August 2013 - 08:22 AM
Thanks for that. I know it says that in the manual, but I'm looking for something where I don't have to wait for darkness to mount and balance.
Posted 28 August 2013 - 08:47 AM
Posted 28 August 2013 - 09:52 AM
You could slew to a star and make sure it is centered, release the clutches to balance, and then make sure the star is in the exact same place before tightening the clutches back up. Your gotos will be fine and as long as you don't touch the alt/az knobs so will your polar alignment.
This assumes the star (and there fore the Earth) will stop moving while you balance your gear.
Posted 28 August 2013 - 10:04 AM
Posted 28 August 2013 - 10:16 AM
To get what you want, Set a Home Position.
Install your gear and balance.
Mark the counterweight shaft and dovetail bar.
If you have more than one OTA, just balance and mark the counterweight and OTA positions for each configuration.
Now you have a set Home Position and a repeatable balance for each configuration...
FWIW, this looks very similar to the Park and Sleep Scope functions in meade Autostar....
Posted 28 August 2013 - 10:55 AM
Posted 28 August 2013 - 11:06 AM
an off the wall question while have the DX brain trust here,, I have a CPC 9.25 tri-pod, can the DX head be mounted on it? Thank you,
Please don't hijack this thread. If you have a unrelated response, please start a new one. Thank you.
Posted 28 August 2013 - 11:50 AM
Posted 30 August 2013 - 05:38 PM