Hi,
I am trying to use sleep mode with a A4988 driver and a nema 14. I am only doing full steps. Since I am using a battery and my movements are done after certain intervals, I need to enter sleep mode between every move.
for example I:
deactivate sleep, move 1 step CW, reactivate sleep, wait 3 seconds, deactivate sleep, move 1 step....
My problem is that when sleep is deactivated the shaft moves 1 step or 2 in the opposite direction before doing the 1 step I commanded.
At first I thought it was due to my motors not having enough holding torque when not powered but I tried with a high torque nema 14 and get the same result.
". A logic high allows normal operation, as well as start-up (at which time the A4988 drives the motor to the Home microstep position)."
This is from the datasheet, I understand when emerging sleep mode or powering up the motor sets to the home position, but since I am using full steps, sould i not already be at the home position ?
If you have any idea on how to help this issu it would be greatly appreciated.
Thanks