I'd like to know which stepper motor driver would be suitable for the Mercury Motor SM-428YG011-25 1.8º 12v Bipolar motor.
I've already bought two combinations of stepper and driver that don't work, for the Mercury Motor I bought the DFRobot dual H-Bridge L298N and using their code, the motor doesn't rotate, just jerks back and forward 1 step. (The H-Bridge is stealing too much voltage I believe)
I also bought the cheaper 28BJY-48 5v Stepper with ULN2003APG driver, now this works, it rotates fine using the standard Arduino stepper code, the problem is that it slips, if I set the code so it takes 8 steps clockwise and then 8 steps counter clockwise all goes well for a few minutes and then I suddenly notice it's about 90º from where it started, I suspect the driver
So my questions are
1) a recommedation for a driver for the Mercury Motor Bipolar stepper 2) I'm also quite willing to build my own driver if anyone can point me to the correct type of circuit. 3) Where can I learn more about bipolar stepper theory, google is directing me to a lot of low information sites.