I'm comparing these two stepper motors:
12V, 0.33A, NEMA 17, bi-polar, 200 steps
3V, 1.7A, NEMA 17, bi-polar, 400 steps
Stepper Motor - 68 oz.in (400 steps/rev) - ROB-10846 - SparkFun Electronics
I'm struggling with some unanswered questions even after reading every stepper motor guide I can find. If anyone could help with these questions I'd really appreciate it! I will refer to the motors by their voltage - I realise voltage isn't that important in stepper motors, but it's just for referencing them.
A) The 3V motor draws significantly higher current at a far lower voltage (and therefore has more torque even at the lower voltage) - so is the 3V motor objectively a better motor? The only disadvantages being price (+$2) and height (+1cm)?
B) Using a stepper driver: hypothetically, would a 3V supply to the 3V motor perform better than a 12V supply to the 12V motor? Despite the higher voltage supplied to the 12V motor, its higher winding resistance means the 3V motor would still outperform it, right?
C) People often run a 12V stepper with 8 AA batteries (12V) and get good performance. Does this mean I can run the 3V stepper with 2 AA batteries (3V) and still get good performance (or even better than the 12V motor because of higher current rating)? In that case I could use 4 AA batteries to power the motor, driver and my microcontroller for a nice portable project - or is this just wrong?
Thanks in advance for any help, I've been trying to figure this out for two weeks!