9100
Diamond
- Joined
- Nov 1, 2004
- Location
- Webster Groves, MO
I am putting two VFDs on a Heald cylindrical grinder. A reoccurring problem is people who turn on the power, do the job, hit the stop button for the motor in use, and walk away with the main switch still on. The problem with a VFD is increased because the power needs to stay on through the braking cycle. I have set up several machines with timers to delay startup for a few seconds to allow capacitors to charge and to hold the supply on for braking. Then everything will shut down with no effort on the operator's part. I can do that this time but some tech support folks have told me that it wasn't good for the drive to keep cycling the power on and off. In this case, I am considering keeping it on and putting a light at about eye level above the main switch where it would be impossible to ignore. Power would stay on for the duration of the job and only be turned off when it was finished.
From the viewpoint of life of the VFD, which is the better solution?
Bill
From the viewpoint of life of the VFD, which is the better solution?
Bill