Major INDI Library release v1.9.0 bring significant internal changes championed by @pawel-soja to modernize core INDI Library drivers and clients. New drivers for DeepSkyDad Flat Panel & Pegasus devices plus further improvements to PCM8 drivers.
I’ve been trying again today with the simulators. It seems like I’m having better success. I remove the slew limits from the AVX, I think these were causing some problems. I also manually inputted the coordinates into the telescope tab in EKOS. The scope slewed to a crazy position after I applied the coordinates. I then just reset the AVX to the home position. I was able to connect, and then plates solve/sync. After doing this I was able to slew and then plate solve and sync to other stars. I was getting occasional crashes in EKOS. The only concern I have is that when I tried to slew to a star near the zenith, the mount was not even close to pointing in the correct direction. This might be because I was using the simulators? It’s been cloudy so I haven’t been able to try anything real.
EKOS really hates plate solving near the pole! I know I’ve seen others warn about this. I used to use a different software that I would start with Polaris and then solve other stars afterwards.
Slewing near zenith may be a problem because of the coordinate computation made into two steps. First target RA/DE is converted into local ALT/AZ, then ALT/AZ is converted into POLAR. The ALT/AZ - POLAR conversion has a singular point at the zenith: here the acceleration of the angular velocity goes to infinite.
This involves activating the alignment system and using the built-in math plugin to sync on stars in a triangle. However, the thread was using the older NexstarEvo driver.
Some interesting things I discovered in my testing:
- Since the driver doesn't know the correct home position and the mount's pointing gets worse over use, I found parking the mount at the start, and then moving the mount to the index marks before unparking, allowed me to set and quickly reset back to the home position (North/Polaris).
- Although I am not using any limits, the driver will stop when slewing left of West. No such problems in the East.
- After syncing on multiple stars, I will eventually get the message: "Alpha matrix is singular and cannot be inverted".
In the meantime, I have been using INDI to image and Celestron's PWI to control the mount.
I had put some time in on the AUX driver, but it looked like all the info I was getting back was that it was not designed for EQ mounts.
I was able to have some success initially. But it seemed like it was not stable enough to use when actually trying to image. All my tests have been with the simulators during the day. I had more stable results before I was using EKOS/Kstars. Still trying to find an approach that bypasses the alignment process for Celestron mounts. But with a reasonable degree of stability.
I’m fine with using a different process to polar align the mount. Currently I’m using Sharpcap.
I’ve not been testing the new builds of the aux driver. It was not focused on EQ mounts originally. They have been trying to update it. But last I tried it was still not usable. And I’ve not had to time. Check the new thread out below.