Help With Strange Spindle Motor
Anybody out there know anything about this Motor?
I have an EMCO small turning center that I am planning to retrofit.
The spindle motor is a Baumuller Nurnburg
G-Mot Typ GNAFF 100MV Nr 871503
Err 310-86V 1.05-3A
Isol-KI.F IP 23 Schwinggute R
The Data Plate on the machine itself says 3X380/220 V 60 Hz 16A
According to the literature the motor controller is a regenerative DC type. The motor has brushes.
The spindle controller is integrated with the rest of the control and I don't think there is anyway I could use it. The lathe supposedly had a transformer with it at one time. (doesn't jive with the data plate but that is what I have been told) The transformer stepped up 220 3ph to 380 3ph. To run this I would need the transformer plus a phase converter, and the machine is supposed to be a little finicky about the quality of power.
I may swap out to a VFD 3phase motor setup. In which case the question becomes how big? The motor on the lathe claims to be a 7.5 hp DC motor. This seems like huge overkill to me. The lathe has a 6 in chuck. The swing is 11 in., 6in over the cross slide. This machine has a belt drive spindle with no back gear and only one ratio. I am not in production and do not have to hog off huge amounts of material in a short time. Will a 5hp 3ph do it?
It would be nice motor but unless you have the controller working it would cost big $$ to get going, I have a gear head 10 speed lathe that is 12" swing over the bed and it has a 4hp motor which is lots, But if you only have the one ratio then you will probabally need at least 3hp.
If you go with a VFD off of single phase then you can probabally feed the rest from single phase hopefully. It depends on what the servo amp types are.
Don't think there is much chance of getting the drive working. Emco will not give out schematics. Everything on the boards is in german and I don't speak much more than "ein grossen bere bitte" and "prost!"
The machine has 5 phase steppers. I will be replacing them with microstepping drives and 4 wire steppers. Unless of course I can find some used Vexta drives. The rest of the machine runs on 220 V 60 Hz, coolant pump, lights etc. Unfortunately the motor driver appears to need 380V 3 phase input. ugly all around.
thanks for the reply