Originally Posted by
mokuleia
Thank you all for the replies. Let me had some details.
I confirm that the VFD and spindle are both 110V, not 220V. The link to the manual was just to reference to current limit function (P142). I include pictures of the spindle and VFD below with electrical specs. Surprisingly, the current rating on the spindle is 8.5A, so not sure where the 2.2kW comes from...Is that current per conductor?
I have read also that the current input for the VFD is nearly double that of the output. If that is correct, I would need 40A in to get the 20A output stated on the plate.
To be clear, I got this 2.2kW/110V combo from a CNC stater kit on Aliexpress. I am not sure if I can return it free of charge and the only thing I could get as replacement is a 1.5kW/110V combo. There are 220V options, but I have only three 20A/110V breakers in my little shop, so running 220V lines migth be hard.
Knowing these specs and the fact that I paid a 2.2kW combo for the price of a 1.5kW, do you see any benefit in swapping the 2.2kw for the 1.5kw? Would not running the 2.2kw at 60% (1.5kw/2.2kw) give me about the same performance compared to the 1.5kw at 100%?
More importantly, will the 110V/20A breaker on which the VDF is solely connected being able to handle the load if the output current going to the spindle (connected to a different 110V/20A breaker) is 13A (see above comment about current IN being 2X of current OUT)?