I have an Ioptron CEM 40, running the latest firmware (v5. 7.5, Sept 2020) and the most recent stable ASCOM Platform & drivers. I guide using PHD 2 and use APT for acquisition. The last couple of times I notice PHD 2 displays an error message that says that the calibration has to be redone as the mount guide rate has changed since calibration was performed. I calibrate everytime I set up.
But after seeing this error, I checked the guide rate setting in Ioptron commander under mount settings and sure enough my mount's guiding rate has been changed from my default of 0.75 for RA and 0.75 for DEC to 0.5 on both axis.
The problem is that with a rate of 0.5, I am unable to complete my guide calibration. It takes forever to move the guide stat the necessary steps to calibrate at a rate of 0.5. if I manually reset it back to 0.75, and press apply settings, nothing happens. It appears the settings are applied but if I close the settings panel and reopen mount settings, the guide rate has besn reset to 0.5.
I have looked at all the settings in PHD2 and APT to figure out if there is anything else that is over riding the guide rate setting and there are no other ways for me as a user to sepcify this information except on tbe Ioptron commander software.
This has been very frustrating to deal with as you can imagine being out in the field and having set up all equipment in tbe dark and in the cold but running into this error with no apparent solution. I can't think of any changes to my software or my drivers and my prior to this, the same versions do the software and firmwares gave me no such issues.
Please help. Has anyone else seen something similar?