Greatings! I have DRV8711 up and running, but I`m experiencing problems with the settings. I want to use NEMA 17 stepper motor. I`m using IRF530 MOSFETs for the bridge.
Here are my settings:
CTRL: 0000 0000 0001 1001// Deat time 400ns, Gain 5, 1/8 step, DRV enabled
TORQUE: 0001 0001 1010 1010// TORQUE 170
OFF: 0010 0000 0001 0100// 20us
BLANK: 0011 0000 0000 0000 // 1us
DECAY: no change, by default
DRIVE: 0110 0101 1010 0100//0.25V treshold, OCPDEG by default, TDRIVEN=TDRIVEP=1us, IDRIVEN=200mA, IDRIVEP=100mA
STATUS register cleard.
When I used 4kHz step frequency(50% duty cycle) the step motor is running but slowly. When I increased the step requency to 16kHz I recieved Channel B predriver fault.
I think something is not right! I haven`t put 0 ohms resistors on all low MOSFET gates, but I daubt this is the problem.
I think something in my settings is wrong! Can you help me?
Thanks!