Root 3 CNC - VFD Wiring

Some of this information was already documented in the post "Programming the HY02D211B VFD", but this entry is meant to be a full reference on the VFD/Spindle wiring connections.

The wiring panel is accessed by removing two case screws on the VFD:

This particular VFD connects to 110V and converts it to run the spindle at 220V.  A 12/3 SJOOW cable was purchased and connected as follows:

• Black (HOT) to R
• White (Neutral) to T
• Green to Ground

The spindle aviation connection pins are numbered as follows:

In addition to the 4 wires (3 hot plus ground), there is a 5th wire which is the control cable shield braid (GREEN+WHITE WIRE = BRAID), which also needs to connect to ground.  The following table lists the connections:

SPINDLE  WIRE    VFD
1                 2             U
2                 1             V
3                 3             W
4                GRN       GND
                  BRAID   GND

Ultimately there were too many ground wires to connect directly to the VFD.  A pigtail wire was installed from the VFD GND, and all of the remaining wires were bundled.  Initially a wire nut was used for testing, however, that was replaced with a WAGO connector for safety purposes.