Hi Willem
Since to the StarGo Keypad buttons are already assigned many functions, no more else features can be operated. So the focuser changing speed should be changed inside the StarGo Software.
By the way by setting a Medium Motor Speed and Step/Pulse Ratio from 3 to 5, you can perform a fine focus with repeatedly quick press on the Focus +/- button, on the other hand, holding more the 1 second pressure on the button, the focuser can smoothly move at medium speed.
Best regards
Stefano
Avalon Instruments Team