Originally Posted by
pmurdock
G'day all,
I've got an Applied Motion stepper (HT23-401) NEMA 23 , 187 oz/in holding torque motor, 3 V, 3 A/Phase hooked up to a Gecko G202 drive. Power supply is 36V 4.5Amp supply. Motor wired up in Bipolar Parallel (8 wire motor)
Arduino connected to this on the Step, Direction, and Common (+5V) ports on the Gecko..
I can get it up and running - but even with the Arduino doing nothing and supposedly full holding torque I can move the shaft on the motor.. It's tight don't get me wrong, but I can defintely move it (should I be able to do that with 187 oz/in holding torque?
I have the current set resistor to 68kOhm to provide roughly 4 amps.
HOWEVER even though the current set resistor is set for that I only see about 0.7 amps off the power supply in holding position.. I am wondering if the Gecko drive is shot somehow.. I did the test as mentioned here on the forum and none of the MOSFET's showed 0 Ohms to either GND or VCC.
When I spin to higher RPM there is absolutely no strength (torque) I can stop the spinning with my hand freely.
any ideas?
cheers,
Paul