Uploaded December 2025 | Updated September 2026, 2 weeks ago
SainSmart 4040 Pro Cnc 800 watt spindle upgrade (Part 2) This video shows how I wired and tested the 800 watt VFD controlled spindle.
SainSmart 4040 Pro Cnc 800 watt spindle upgrade (Part 2) This video shows how I wired and tested the 800 watt VFD controlled spindle.










