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Cheap microstepping system with STK672-080
A stepper motor driver for CNC, built around the Sanyo STK672-080 hybrid IC.
A low-cost stepper driver built around the Sanyo STK672-080, a hybrid IC with power MOSFETs and a built-in microstepping controller (unipolar constant-current PWM).
- Inputs: step, direction and enable, through an internal translator.
- Jumpers M1 and M2 select full, half, 1/4 or 1/8 stepping.
- Up to 45 V and 3.3 A (2.8 A without a heatsink), input pulses up to about 50 kHz.
- The 1/16 mode isn’t true microstepping, so 1/8 is the practical maximum for CNC.
This is an archived project, first published on 17 January 2013.