Recently purchased a Full size sharp milling machine out of state auction in South Carolina. The machine is in beautiful condition and everything seems to be well with it but of course it is three phase. I purchased an inverter off of Amazon
Variable Frequency Drive, 5.5HP 220V Single-Phase Variable Frequency Drive VFD Speed Controller for 3-Phase 4kW AC Motor 0 - 400Hz
Amazon.com : Variable Frequency Drive, 5.5HP 220V Single-Phase Variable Frequency Drive VFD Speed Controller for 3-Phase 4kW AC Motor 0 - 400Hz : Tools & Home Improvement
It is nicely oversized for the motor since the motor on the milling machine is only three horsepower so there should be no problems with it. I programmed it to work on 60 cycles and wired it all up and plugged it into 220 Volt single phase and turned the machine on and everything seemed to be fine. When I went to turn it on the second time it didn't work and it gave me error 1, “short circuit current/overload power module protection” I got it to turn the machine on about three or four more times, but I keep getting this error.
I googled this error on the Internet and it suggests that you program the ramp up time to two or three seconds but this is not a parameter which can be adjusted in the instructions. Hoping that perhaps the inverter was a bad one I returned it and got another one and it is exactly the same. This one managed to turn the machine on one time only. And it hasn't worked since.
Does anybody have any suggestions for me. I can tap off 110 Volt current from it just fine to run the fans on the machine and the DRO and an electric drill, but every time I turn the machine on with the 3-phase current, it throws this error. I have the output of the DRO wired into to the normal on/reverse switch on the milling machine and I press the run button on the inverter and when it gets all the way up to 60 Hertz, I flip the switch on the machine to turn it on. Three or four times it has worked [Motor sounds very nice when it runs] but the rest of the time I just get the error. I have also tried turning the switch on and then pressing the run button on the VFD and it just immediately goes to error. I have checked the windings in the motor, and they are all good and have the correct number of ohms and there's no grounding in the machine I checked the switch it works correctly, and it is not going to ground except where it's supposed to.
Variable Frequency Drive, 5.5HP 220V Single-Phase Variable Frequency Drive VFD Speed Controller for 3-Phase 4kW AC Motor 0 - 400Hz
Amazon.com : Variable Frequency Drive, 5.5HP 220V Single-Phase Variable Frequency Drive VFD Speed Controller for 3-Phase 4kW AC Motor 0 - 400Hz : Tools & Home Improvement
It is nicely oversized for the motor since the motor on the milling machine is only three horsepower so there should be no problems with it. I programmed it to work on 60 cycles and wired it all up and plugged it into 220 Volt single phase and turned the machine on and everything seemed to be fine. When I went to turn it on the second time it didn't work and it gave me error 1, “short circuit current/overload power module protection” I got it to turn the machine on about three or four more times, but I keep getting this error.
I googled this error on the Internet and it suggests that you program the ramp up time to two or three seconds but this is not a parameter which can be adjusted in the instructions. Hoping that perhaps the inverter was a bad one I returned it and got another one and it is exactly the same. This one managed to turn the machine on one time only. And it hasn't worked since.
Does anybody have any suggestions for me. I can tap off 110 Volt current from it just fine to run the fans on the machine and the DRO and an electric drill, but every time I turn the machine on with the 3-phase current, it throws this error. I have the output of the DRO wired into to the normal on/reverse switch on the milling machine and I press the run button on the inverter and when it gets all the way up to 60 Hertz, I flip the switch on the machine to turn it on. Three or four times it has worked [Motor sounds very nice when it runs] but the rest of the time I just get the error. I have also tried turning the switch on and then pressing the run button on the VFD and it just immediately goes to error. I have checked the windings in the motor, and they are all good and have the correct number of ohms and there's no grounding in the machine I checked the switch it works correctly, and it is not going to ground except where it's supposed to.