I recently migrated to a Celestron CGX from an Orion ATLAS EQ-G via EQMOD, and am struggling with understanding the Celestron CGX driver.
I believe I am using "indi_celestron_gps" version 3.2 interface 5 as selected when I choose "Celestron CGX" from the mount time.

1) There appears no way to connect directly to the mount - you MUST connect via the hand controller USB. This would appear to be a limitation imposed by Celestron, and no one has cracked the proprietary mount USB yet.

2) The mount appears to be implementing some kind of hard-coded backlash compensation - every GOTO, no matter how small, or in what direction, results in the mount slewing away from the current position, and re-approaching it from the lower left in both axes. I can not find any parameters to tune or disable this. In Kstars/Ekos, this is especially annoying on Capture & Solve -> Slew to Target mode, as it requires about 6.5 seconds to do this dance in order to "settle" for the next try, and this technique still fails to completely solve mount model problems that the EQ5-G had in small moves through backlash.

3) There appears to be no way to slew to a position and "STOP". Slew / GOTO always results in entering "TRACK" mode regardless of whether it is to to "TRACK, SLEW, or SYNC" in the "On Set" INDI dialog. This has made manual points (for example, in surveying my horizon for creation of a horizon mask) more intensive, as I always have to tell it to manually STOP tracking.

Is there a better resource for documentation / setup than here (which does not yet mention the CGX in supported mounts) indilib.org/devices/telescopes/celestron/celestron-nexstar.html

Read More...