220v vs. 110v Spindle?

There are 2 different voltages to pay attention to. Most spindles are 220v - the 3-phase circuit between the VFD and the spindle is at 220v. I have seen some 110v spindles, but 220v is more common The voltage between the wall outlet and your VFD can be a different voltage - as long as you get a VFD that supports the configuration.

I started out with running 110v to the VFD, and then a 220v 800w spindle behind the VFD. Now, I have 220v on either side of the VFD, and a 2.2kw 220v spindle.

A lower voltage will mean a higher current draw for the same power output. If you’re going up to the 80mm size, you can find both 2.2kw and 1.5kw spindles in that size. For a 2.2kw spindle, I really think 220v to the VFD makes the most sense - you would be very close to the max amp rating on your circuit if you stayed at 110v.

As long as you match the input voltage to the VFD’s capabilities, and supply enough current for the load, you won’t be able to tell the difference in how the spindle performs.

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