TRINAMIC Motion Control's new TMC2660 stepper motor driver IC supports motor drive currents up to 4A. The new IC integrates both a pre-driver for real-time calculation of motor coil current values, ...

Next, look at the driver current required to get target motor torque. Select a stepper driver based on that number. Tips 1 and 2 courtesy of David Goodin, AllMotion Inc. Be aware of torque issues.