VFD inside or outside the control box?

[Doddy]

This is why you want to screen all the cables and ground them to a single point at the control box/VFD end.

For emissive cables (steppers, spindle) you should bond the screen at both ends to the respective enclosures.

<Opens popcorn>

[Muzzer]

Haha, nice try. Some (most) VFD manufacturers say one end, others say both ends. Probably doesn't really matter for the sort of work we do but this is an old chestnut. Let's just say there is no right or wrong here...