I recently purchased a lathe that after wiring it up it did not run. I found that the coil on a contactor had sort of melted which also made it so that I could not even operate it manually/push it in by hand. There are two other contactors, a forward contactor and a reverse contactor, so I am not sure what this one is for, but it has power to it at all times and is pulled in. The only way to stop it is to use the main disconnect on the machine. Could this be why it was burned out in the first place? I can see from the footprints inside the panel, that the contactor is not the same as what was there at some previous time. I understand that this is not enough information, but before I spend hours of studying to try to teach myself, I am wondering if this is normal in some applications. I cant see that a machine should have an energized contactor at all times nor does it seem right to have to shut the main disconnect off when not in use. I have been looking for a schematic for this machine for several months and have not been able to come up with one so I guess this is going to be a learning experiance.
After replacing the contactor (Allen Bradley 100-C09) the machine runs fine and all of the controls work as they should.
After replacing the contactor (Allen Bradley 100-C09) the machine runs fine and all of the controls work as they should.