SWI MX3 Proto Trak Repair Service

Professional diagnostic and board-level repair service for this SWI MX3 Proto Trak.

ProtoTRAK MX3 is a three‑axis CNC control system from Southwestern Industries that blends manual machine operation with full contouring capability. Common failure points for this unit include the internal power supply board (overheating or failed MOSFETs), the serial/USB communication interface, and the stepper motor drivers which can misfire under high load. Initial checks should verify proper 24 V DC input to the controller, inspect all I/O connectors for corrosion or loose pins, and review any error codes displayed on the panel or logged in the control software. If faults persist, test the stepper driver outputs with a multimeter and consider re‑flashing the firmware via the USB port. Post Comment

Need your SWI MX3 Proto Trak repaired?

Ship your unit to our North Carolina repair shop for component-level diagnostics and a repair estimate. We service industrial control electronics and power systems nationwide.

• ⚙️ Board-level diagnostics – Troubleshooting beyond simple module replacement
• 🔁 Clear approval process – No repair begins without your approval
• 🧰 Expert Technicians – Decades of board-level experience
• ✅ 1-Year Warranty – Included with completed repairs

Start a Repair Request   Call 1-336-969-0110

Nationwide service • Industrial-grade testing • 1-year warranty on completed repairs

Owner-Operated • Practical Pricing • 1-Year Warranty • Nationwide Service

Other Repaired Units by SWI