This indexer:
http://www.worldofward.com/rotarycontrollerBought some years ago and finally got to order keypad and other parts.
Took a little time to fiqure out how to konnect the keypad. Layout was correct, but rows are inverted.
My problem is that the rotary controller seems to be working right and I can measure that all pulses comes out fine from it but the stepper motor does not rotate.
The stepper driver and motor are small, but I want to test the indexer completely, before I comit building the mechanics and rest of the system.
Pololu DRV8825 Stepper Motor Driver Carrier:
https://www.pololu.com/product/2133This circuit:
https://a.pololu-files.com/picture/0J4232.600.png?f2f6269e0a80c41f0a5147915106aa55The Ward rotary controller seemst to work fine. PSU for it is 12VDC galvanically separated switched mode powersupply. The linear regulator makes +5VDC. GND is connected to stepper controller GND.
The Pololu stepper controller receives +5V to RESET ja SLEEP pins.
FAULT-signaali is +5V all the time.
Motor current is adjusted to 1A:
PSU to stepper controller is repurposed laptop brick (16VDC/n.7A). Bulk capacitor is 100uF.
I haven't connected or disconnected anytjing with power on.
Nothing heats up, but the stepper bridge is floating, it does not feed the stepper, no matter what I do.
Am I doing something fundamenttaly wrong?
Pekka