Quote
the_digital_dentist
How are you moving the Z axis rapidly? Are you using a jog function or are you manually forcing it to move?
With the move stepper option under Prepare in the lcd.. I say rapidly but it is quite slow. just +10 cm back to 0 repeat, it wont ever move more than 15 cm total before it fails. 30 seconds total.
The main symptom I see other than shutdown is chatter in the servo. All axis cause interference on that servo, but none are anywhere close to as bad as the Z, I suspect its because it has 2 steppers and draws more currant.
The restarts still occur when the servo is unplugged all together.
This whole thing was noticed because i had just replaced that servo, due to wires being constantly stretched, it would fire randomly when my x axis would move to far to one side. I have tried 2 other servos, and the original one again and all work the same way, with lots of jittering.
My servo wires are totally separated from all other wires servo has been powered by:
Powering directly from the powers supply and only connecting the stepper data line to the ramps, on the d11 pin,
data to d11 and power from adjacent 5v and ground wires using the 5v jumper located toward the power supply from d11,
data to d11 and power from Other servo controller such as 5v/ground next to pin d4
All ways of powering the servo suffer the same massive jitters.