- Joined
- Nov 10, 2013
- Messages
- 376
I have a couple questions. I set my perameter for what I had found best lathe 8 second ramp and a 3 second deceleration. Will this adversely effect my mill? I typically only adjust the frequency when threading to a shoulder would there be any issues with that? Also on my gs2 I have just use the two wire forward and reverse using a 24v DI for the forward command and the same for the reverse. I’m breaking the common for my E-stop. Most my day to day drive experiences are 1500HP ABB and Siemens VFDs. My big motors are 2000HP traction motors driven with SCRs. I’ve not had any issues with my current set up just kinda worried now. I never run my mill at less than 60hz the motor on it is not drive rated. I just don’t want the ramp and deceleration to crater my mill.I agree with Jim in this case for several reasons, but with one caveat. Using the same VFD for both machines using the same parameters is not a good choice. What can be done is some VFDs allow you to setup two separate parameter files, one for each motor, you can switch the motor parameter files based on a programmed input. You cannot use the machine motor switch/contactors to control the VFD output, you need to program the VFD low voltage inputs for the VFD run commands. Since the run commands and mode of operation would be different between the lathe and the mill, it can get messy quickly. At the end of the day if this is a long term replacement you would be better off using a dedicated VFD for each machine.