Controller shows wrong COM or frequent disconnects:
Axis jitter or missed steps:
Axis moves inverted:
Spindle not controllable via M3/M5:
Limits/home not triggering:
Connect the Spindle: Connect the water-cooled (or air-cooled) spindle power cable to the designated port on the control box. Connect the water pump to a separate power source.
Power On: Flip the main power switch on the control box. You should hear the fans spin up.
Driver Check: Open the Windows Device Manager (Right-click Start button > Device Manager). Look under "Ports (COM & LPT)" or "Universal Serial Bus Controllers." You should see a "USB Serial Port" or a specific device name like "CH340" or "HL-340". Note the COM port number assigned (e.g., COM3).
