Pin 2: X-Step. Pin 3: X-Direction. Pin 4: Y-Step. Pin 5: Y-Direction...
Mark, a hobbyist who had just built his first CNC router from scrap aluminum and skateboard bearings. The Problem: The machine was built. The motors were mounted. But the brain (the computer running Mach3) couldn’t speak to the muscles (the stepper motors). Mach3 Interface Board Wiring Diagram
He touched a switch. A red LED on the board flickered. The computer saw it. The final section of the diagram showed a relay output. Pin 2: X-Step
“This board isn’t a component,” he whispered to himself, recalling his online research. “It’s a translator . My computer speaks 0s and 1s. My motors speak voltage and current. This board is the interpreter.” Pin 5: Y-Direction
“This is where the magic happens,” Mark said.