Hi Ken, I had the same issue that I couldn’t stop movement of the focuser, but I believe it’s two problems together.
Rigel nStep focuser controller don’t like power spikes if it runs from the same battery with other equipment. Sometimes it looses the connection to port and when you try run the application it throws you an error.
Last night, I tried to connect to focuser from SGP and usually it runs the GCUSB application as normal. This time GCUSB throwed an error that it couldn’t find the focuser on it’s port, but SGP focuser connection button became green and showed that it is connected successfully. I decided to ignore the application, as SGP made the connection and tried to move the focuser by pressing Focus For Lum.
Focuser started to move and all seemed fine, only I noticed that it had past the Lum filter position steps and continued to move out wards. I noted that something wrong and hit the stop focuser button and it didn’t help, focuser continued to move out.
I had to pull the power and usb cable from the controller to stop it and then reconnect all back, reset the position and it worked fine again.
I believe SGP had sent the stop command to focuser, but it never received it because of lost connection to port, but how it was able to make it move in a first place and show the green button that it is connected? Something definitely wrong here.
Unfortunately, GCUSB don’t keep any logs so it’s only the SGP log that I have here:
Thank you for your time.