Need some help with a VFD

[Kcwoodbutcher]

I just purchased and installed a 4KW/220V VFD on my 5HP three phase radial arm saw. It's one of the bargain Chinese models sold on e-bay. I actually like the unit but it has a problem. I set all the applicable programmable parameters to the proper settings. and fired it up. The saw runs but the second it hits a load it stalls. I did some checking and the output voltage is only around 48 volts. It should be about 220 volts. The DC voltage after the rectifier bridge is 348 volts, about right where it should be.  The current at no load is only about 0.7 amps and under near stall it only rises to 3-4 amps. All these readings are via the converter display, my dvm doesn't like the waveform output of the converter. I pretty sure the motor is ok and I am surprised it runs at 48 volts. Any help is appreciated and any more info needed please ask

[Kbeitz]

On some VFD's there is Sooo many setting. I would read the book
and see if you missed something. Check your Constant Torque or
variable torque load settings.

[Den Socling]

And I wouldn't buy anything as complicated as a freq drive from the Chinese.

[Kcwoodbutcher]

Fixed it. I thought I had gone through all the parameters but must have missed one. The base frequency was set from the factory at 400Hz, should have been at 60 Hz. Don't really understand what the base frequency is but I'll assume there are a lot of other parameters that use this number in there calculations. Den it's not that bad if you can read the chenglish the manual is written in.

[Den Socling]

Yep I have read manuals in Chinese, Italian, Russian and some others. Translaters  leave a lot to be desired. If you ever buy another, look at AutoDirect.

[yukon cornelius]

Silly me, I thought you needed help with your Volunteer Fire Department  ;D we need help with ours. Like someone to donate a new pumper  ;D

[Farmerjw]

Exactly what I thought when I read VFD!

[r.man]

North American grid is 60 Hz, European is 50, haven't really heard of any other modern grids being other than one of those two. I expect that is the number the VFD was looking for, the Hz of the supply.

[Den Socling]

With freq drives I have worked with, the default values will get you running EXCEPT for the motor settings. You should take voltage, current and frequency right off the name plate of the motor.