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Question #: 14408

Question: My Spindle has 4 pins but only the U, V and W terminals at used for the Spindle. What about the 4th pin?

Current Solution

The terminals of U, V and W from the VFD (Variable Frequency Drive) connects to the three coils (first three pins of the connector) of the spindle. The 4th pin in the spindle is typically not connected; however, bring a wire from the PE (Protective Earth or Earth Ground) from the VFD and connect it to one of the screws of the connector on the spindle. This will ground the body of the spindle.

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Other Possible Solutions to this Question