This is my first post, so be gentle.
I have been having trouble over the last couple of months with sequences crashing. The crash appears to occur when SGP attempts to communicate with my Lakeside USB Focuser. I have spent a lot of time with my configuration to ensure I have all the latest drivers/firmware etc, I have also upgraded/rerouted USB cables in an effort to minimise any noise or interference. All with no improvement. "Crash" is perhaps the wrong word, SGP continues to operate but incorrect focus operation.
The problem occurs in all the SGP Beta V2.6 range of builds and V18.104.22.168.
During an imaging run SGP appears to lose comms or have partial comms with the focuser, this can happen at either a filter change or at a temperature compensation point between frames. I am not using autofocus. I manually focus with a Bhatinov at the start of an imaging run using the In/Out Fine & Coarse buttons in the focus tab of the control panel and let the temperature compensation do its stuff at 5 steps/degree with auto adjust per filter set.
The In/Out Fine & Coarse buttons always function correctly and the temperature is always read and displayed in the Focus Information field correctly during the manual focusing stage. At apparently random filter changes or between frame temperature compensation points during the imaging run, the focuser can end up set with a value that maybe several hundred steps in error. I have also noticed that the temperature will may longer be reported but shown as NA. Sometimes the focus values can be seen slowly decrementing/incrementing to the desired value in bursts with large delays between. Sometimes the focuser appears never to reach its desired position.
I have tried adding up to 10s delays after a filter change and between images without any noticeable improvement.
Another thing I have also tried, is running the Lakeside focus control utility at the same time as SGP (but without SGP connected to the focuser), this has work fine with no comms issues. I have also tried swapping scopes to try a different stepper motor, also with no improvement.
In an effort to get to the bottom of the problem. I have run some test sequences with minimum equipment and with simulators selected ie not really imaging at all. The focuser and filter are directly connected to the PC and not through a Hub. Please see https://www.dropbox.com/sh/9oknajwx59ndwub/AAAUN3ipjMq6NzMNzJEaTLAJa?dl=0 for the log files and sequence. Time 11:04:26 is when things start to go wrong.
I have sought assistance from Peter of Lakeside Astro, who has been extremely helpful. Peter has verified that Windows/Firmware/Ascom drivers are all correct. Peter has managed to recreate the problem with his set up and would be glad to get involved with resolving the issue.