Hi,
I'm using DRV8824 to drive a hybrid bipolar step motror(12V,0.6A,1.8°) in a microstepping mode(up to 32microstep/step), because i would like to reach a step of 0.06 degrees(around 1.8degrees/32).
My circuit, reproduces exactly the one shown on page 19 of the datasheet, except for the value of VREF, which is 1.5V to obtain a current of 0.75A of full scale.
The control pins are connected as follows:
Enable (connected to GND)
Sleep (+ 5V)
Home and FAULT (Pull Up +5 through 10 Kohm resistor)
Steps Imput is 5V amplitude 1Hz Frequency
As long as I select the full mode or half mode everything works fine, but starting from fourth on engine no longer has a fluid movement, but does little jumps, and when I select 32microstep / step motor is not moving and emits a sort of hiss.
can you help me??