Thread: VFD for drill press
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30-03-2016 #11
It's not in the operator's manual, it's in the Parameter List
You need
P0003 set to 2 so that all the parameters you might want to change are accessible to you
P0700 set to 1 for command input to be BOB (panel)
You might need to select the control frequency setpoint source and a few other odds & sods but the Parameter List is where you'll find the settings described -
http://www.acpd.co.uk/sei/s/1488/f123.pdf
Regards,
Nick
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30-03-2016 #12
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30-03-2016 #13
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30-03-2016 #14
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31-03-2016 #15
As Magicniner has said, these VFDs take single-phase in and produce a 3-phase output that is designed to drive a 3-phase motor. Why can't you just use two of the output connections and drive a single-phase motor? Main problem (there are others) is that the motor will probably not start unaided. Single-phase motors have some clever bits in them to get them started from stationary; you often hear a click from inside the motor as they spin up to speed. This is the centrifugal switch cutting out the starter circuitry (often a capacitor bolted to the outside of the motor). This is all designed to run at a single speed. Imagine a children's swing in a playground. It swings at a steady speed, and you just need to give it a nudge at regular intervals to keep it swinging. That's the way a single-phase motor works, where the incoming alternating voltage generates a magnetic "pulse" that is synchronised with motor revs. 3-phase motors work differently - the three phases generate what looks to the motor like a rotating magnetic field at the frequency of the input voltage, and the motor follows this whatever (within reason) the speed. Obviously, it's all a bit more complicated than that, but I hope that this helps.
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