I designed this for my own use, for use with in a CNC PCB Drilling Machine then in my New CNC Machine, which is a lot better than the first. I wanted to keep it simple, with few components. Its the bare essentials, just 3 Axis, STEP and DIRECTION for X,Y,Z.(6 inputs) No ENABLE or limit switches. It has one option, TOG, which toggles the timer that turns off a phase after stepping, otherwise it stays on, holding. It is designed for 3 Unipolar Stepper Motors.(5 & 6 Wire) And has been tested, and works great with KCAM.
Designed to control high-wattage motors, up to 20w per phase with no addional parts, but upto 40w per phase with some minor modifications.
Schematics, HEX, PCB layout are availbile in the project files below. Source code, written in assembly, can be purchased for $2 in the Store
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