Recently, I've found an alternative to wiring allegro pololu stepper drivers on a breadboard with a bunch of resistors and jumpers to the Smoothieboard.
Instead I'll be using a DQ860MA or a TB6560 Stepper Driver Controller. It is a bit more expensive than a pololu driver, but I don't have to worry about pcb boards and other knick-knacks. Plus, it allows me to drive much higher current steppers, say a NEMA23 with 282 oz-in of torque.
This is almost 4 times as much torque that is available with my high torque 76 oz-in NEMA17s.
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