Hi Nick et al,
Thanks for you patience, I have been looking into your issue with SGP. I am confident the problem is now resolved. This is what happened .... over the last couple of driver versions I have been making behind the scenes change to make the driver 100% ASCOM 6 and and clean as I can. However, I think that one such change has introduced a problem which I intend to follow up with the ASCOM guys. Upshot is I hope to have fixed the instability and have uploaded a new V3.10 version of the driver to the link on the SharpSky Kit website. I have soaked tested this version over a 24hr period with SGP & MaxIm DL.
http://dt-space.co.uk/SharpSky_Kit/
The new driver has a new feature under the 'hardware control' panel that allows the user to pre-set the focuser position to any arbitrary value. This does not move the motor but simply changes the value reported in the client to a value you want to see or maybe a zero point. Also the maximum range of the focuser has been extended from 50,000 to 150,000 steps.
Please let me know if the new driver version fixes your issue.
After closing all ASCOM applications uninstall the previous driver before installing the new version. You should see version 3.10 in the SharpSky setup window prior to connection.
Cheers & clear skies,
Dave