Motors don't run

[Ascend]

I guess you refer to mdingena’s post in the faq section:

@mdingena

Itrip = Vref / (8xRs)
Rs is 0.1R, so with Vref at 0.6V, Itrip is 0.75A. This is reduced to 0.525A by the A4988 chip for full step operation. The motors are rated at 1.7A, which equates to a Vref of 1.36V (actually 1.9V when you allow for the full step current compensation by the A4988). So you have plenty of room to increase the Vref.

Please not the part that I marked with strong characters. Are you still using the original stepper drivers (A4988)?