Thank you in advance for any help that can be offered. I am hoping that my problem is as simple as a faulty switch, but....
I have an Emco V13 which has a 3HP 3ph motor mated to the wj200 2.2kw VFD. I have been running the machine for about a year now, and have had some progressive issues with what I will call unwanted braking just after the unit warms up, and then it usually runs well. The progression has lead to the VFD turning on when power is applied, running for a few seconds, and then shutting off with only the green pwr button blinking a handful of times and then nothing. I have a 300W 40ohm braking resistor wired per instructions, and it has worked very well.
I waited at least ten minutes after power has been cut before performing any wiring changes.
I have taken motor, including ground, and control wires as well as the braking resistor wires off the VFD, and restarted the VFD on its own (also checking all connections in the safety switch including fuses, and the VFD power/ground wires). It goes through its normal start up with no issues - this is progress as previous to this it would not even turn on!
I reattached the motor wires (power disconnected for 10 minutes), applied power to the VFD, and it ran through the start up again. No issues and no error codes - progress?
Reattached the control wires, but not the braking resistor, after checking the connections at the lathe to make sure there were no obvious breaks in the wire or loose connections. Started up just fine, no error codes, so I tried the forward lever on the apron, and the chuck spun in the correct direction with no issues. Put the lathe in reverse - no issues. Forward at about 700rpm, and it ran for a few seconds, didn't quite get to full speed as I have it set for a 5 second ramp up , and it stopped as if the lever had been switched to neutral. The chuck stopped as it normally would with the braking resistor attached (I imagine this is the VFD's internal resistor doing its thing).
The VFD's fan, at this point, was running though the screen went to all ------, no alarm or code was flashed, and it shut off.
Prior to this level of shutting down on its own, the VFD would brake like this for about a minute or two after it had run through the start up (I always wait for the initial fan to stop running before applying power), but it would always then continue working. I know...I should have stopped there, and tried to figure it out, but I didn't - I had work to do! .... I'm an idiot.
The thing about it is that once it made it through those initial hiccups it would run great for hours with no problems - my shop would get down to about 50 or so and I ran a ventless propane heater in the winter getting it up to about 65'ish.
Any ideas/questions/concerns?
Thanks guys,
Mike
I have an Emco V13 which has a 3HP 3ph motor mated to the wj200 2.2kw VFD. I have been running the machine for about a year now, and have had some progressive issues with what I will call unwanted braking just after the unit warms up, and then it usually runs well. The progression has lead to the VFD turning on when power is applied, running for a few seconds, and then shutting off with only the green pwr button blinking a handful of times and then nothing. I have a 300W 40ohm braking resistor wired per instructions, and it has worked very well.
I waited at least ten minutes after power has been cut before performing any wiring changes.
I have taken motor, including ground, and control wires as well as the braking resistor wires off the VFD, and restarted the VFD on its own (also checking all connections in the safety switch including fuses, and the VFD power/ground wires). It goes through its normal start up with no issues - this is progress as previous to this it would not even turn on!
I reattached the motor wires (power disconnected for 10 minutes), applied power to the VFD, and it ran through the start up again. No issues and no error codes - progress?
Reattached the control wires, but not the braking resistor, after checking the connections at the lathe to make sure there were no obvious breaks in the wire or loose connections. Started up just fine, no error codes, so I tried the forward lever on the apron, and the chuck spun in the correct direction with no issues. Put the lathe in reverse - no issues. Forward at about 700rpm, and it ran for a few seconds, didn't quite get to full speed as I have it set for a 5 second ramp up , and it stopped as if the lever had been switched to neutral. The chuck stopped as it normally would with the braking resistor attached (I imagine this is the VFD's internal resistor doing its thing).
The VFD's fan, at this point, was running though the screen went to all ------, no alarm or code was flashed, and it shut off.
Prior to this level of shutting down on its own, the VFD would brake like this for about a minute or two after it had run through the start up (I always wait for the initial fan to stop running before applying power), but it would always then continue working. I know...I should have stopped there, and tried to figure it out, but I didn't - I had work to do! .... I'm an idiot.
The thing about it is that once it made it through those initial hiccups it would run great for hours with no problems - my shop would get down to about 50 or so and I ran a ventless propane heater in the winter getting it up to about 65'ish.
Any ideas/questions/concerns?
Thanks guys,
Mike