Quote Originally Posted by kingcreaky View Post
2.)keep the dual motors (as I have all the gear to hand) where there is one stepper for each of the two screws (the gantry is quite heavy!) but I guess this may entail buying the motor controllers to replace the above?
I would keep the two steppers with the drivers you already have. I don't consider one stepper stalling and twisting the gantry to be an issue, since once you've set up the motors properly they will not stall. If they do stall then clearly having the stall detection feature is excellent, since it can prevent any damage, but the motors have no reason to stall so to me it's protecting against something that wont happen anyway. You also have more input power, since there are two motors, unless you use a reasonable size Nema 34 motor if just using one. With either system you always set the motors up such that they will never stall in normal operation, so you don't have to run it slower with two motors to play safe since if either configuration stalls it's set up wrong. Since you already have the drivers and motors(?) it doesn't really cost much to try it and plenty of people use either system. I don't have problems caused by having two motors.

Jazz will now vote for option 1.