It will depend on what his machine needs, the this old Yaskawa drive, which is designed for CNC machines, spindle orientation Etc. there is nothing to argue about. if he does not need any of those things to do with tool change, then any quality VFD Drive will work. 230V 10Hp
Mactec54
HI All I don't get to CNC Zone as often as I used to.
The IGBT in the drive fails and just dumps incoming voltage to the breaking resistor.
I can make the drive cables, and get you a good drive replacement.
Give me a call.
I am here to help
Sportybob
952-288-6340
Bob thank you Mikes Mold & polishing I will have Dave Miller come out and look at this, before going on. The power company checked the line on and before/ after Oct 13th. There were no spikes. The machine is on a 3ph converter.
Hope this is not too much technical info, but here it goes...
I've had this happen three times in my Saftronics VFD that I got in my used Partner 1F. This VFD has an "IGBT" module that contains four sets of transistors as well as three power rectifiers. In normal operation, each of the three phases of power comes into the VFD through a rectifier, and turns into pulsed, high voltage DC and a bank of capacitors smooths out the pulses. This high voltage DC is sent to the three banks of transistors and switched by the VFD controller to create the speed-controlled phases that run the spindle motor. When the control gets a stop command, it turns off the three sets of transistors, waits a fraction of a second, then turns on the final transistor into the braking resistor to short the motor winding, causing the motor to brake. All VFDs work in this basic manner although some have separate IGBTs and more or less features on the control section.
In the case where the Safetronics failed, one of the three banks of transistors shorted to the high voltage power and when the VFD got a stop command, the input power (whether single phase or three phase) was shorted through the rectifiers and directly to the braking resistor (which makes a lot of smoke, and fries wires if you don't catch it soon enough).
I think there was originally a failure caused by an overvoltage since there was an "MOV" in the unit "which is an overvoltage protection device" blown up in the VFD when I repaired it. It had been repaired before, evidenced by some of the capacitors not matching. After my failure, I replaced the MOV and IGBT module and I was off ot the races. The VFD functioned normally for a while, then failed again. I replaced the module again, and it ran for a while and failed again. I wanted to repair it again, but found the board was too damaged to repair.
In the end, I suspect when the VFD was originally repaired (by the previous owner of the mill), following replacement of exploded capacitors, the board was not properly cleaned, causing leakage paths on the controller board. The leakage paths caused timing issues and the IGBT to not shut off before the braking was turned on, causing the phase and braking transistor to short and therefore failing the VFD. Every failure had the same symptoms.
I've seen this reported a few times and I'd have to guess that most of these VFDs have had previous repairs and may have had this leakage. This is all speculation of course, but I do electronics failure analysis for a living, so it's at least an educated guess.