Hey, is this your VFD enclosure?

Hey Tim,

you can buy an empty control cabinet and equip it yourself, where at least you would put into it: A MCCB on a DIN Rail, the VFD for your spindle, a EMI Filter suiting your VFD, a DIN-rail compatible Thermostat for your cabinet’s Fan, a DIN-rail-compatible power supply for your ISO 13849 Safety relay such as a Omron G9SE (datasheet) and also for powering other relays (e.g. for automatically switching dust extraction on and off), an Emergency Stop Switch wired to the safety relay, a power-on and a reset switch, and finally if you want it to look that nice as shown below, a lot of terminal blocks and cable ducts (with cable duct cutter)

Image 1: Here you can see the contents of a control cabinet with both VFD and CNC controller (and much more), wth the recommended cable ducts, DIN Rails and terminal blocks.

Image 2: Shown is the mounting plate of control cabinet with electrical components mounted on it and surrounded by cable ducts. Note that this shows the mounting plate of a CNC Controller control cabinet and not a VFD control cabinet, but the principle is the same. It is also possible to combine both, but in that case the CNC Controller should have its own earthed case. Also important for preventing EMI is a shielded spindle cable.

Image: Control cabinet suitable for a VFD.

Control cabinets have a mounting plate (see image) that you can take out to assemble your components on it and put back when you’re done. The mounting plate is earthed as the entire control cabinet is in order to serve as faraday cage, preventing electromagnetic radiation typically emitted by VFDs from escaping which can cause electromagnetic interference (EMI).

Note that you should own a Crimp Tool for Wire Ferrules (e.g. the wire ferrule crimp pliers from Knipex) and one for Ring and Spade connectors (e.g. the crimp pliers from Knipex with interchangeable inserts) or at least a more simple and cheaper crimp pliers and of course enough stranded wire. The stranded wire should be made of (tinned) copper, aluminium (cheaper) is not recommended, especially on power cables. The wire gauge and the size of the ferrules and the ring and spade connectors are obtained by reading your VFD Manual.

Or, you can buy a control cabinet assembled and configured ready-to-use:

Unboxing video:

CNC Finale: Automatic Toolchanger Spindle Install & Testing – Youtube

Image: Shown is a full-blown control cabinet with VFD, circuit breaker, safety relay (red), and EMI filter on the left, and the pneumatics system for the automatic tool changer system of the ATC-8022-42-HSK25 2.2 kW 42,000 rpm water-cooled spindle on the right (and additional air tube (blue) with valve retrofit by video author which also wanted workpiece mist coolant – described in the video). On the back of the door you see the back of power switch, emergency button and reset button. Note the thick earth line that connects door to the rest of the cabinet.

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