Raising z-steps by a factor of 5 is weird. I'm sure you have an error in your calculation. Tell more about the stepper, driver, microstep-jumpers, pulleys or leadscrew dimensions.
When you've sorted this out, the next step is adjusting the Vref to get the stepper current right.
Edited 1 time(s). Last edit at 11/09/2016 10:42AM by o_lampe.