After trying a number of different solutions to speed up the stepper that is used on the drive screw:

• changing the mode from SINGLE to DOUBLE
• experimenting with the speed settings
• trying a different motor drive board version

I’ve come to the conclusion that the the current 20 tpi 1/4″ drive rod approach isn’t going to be fast enough 😦 . So I’ve ordered a timing gear and a timing belt – these have little teeth on them … read more