Help With Strange Spindle Motor

[flyingmonkey]

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

Data Plate:

G-Mot Typ GNAFF 100MV Nr 871503
400V 15A
5-5 kW
2500-6500 min-1
Err 310-86V 1.05-3A
Isol-KI.F IP 23 Schwinggute R
VDE 0530

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?

Opinions?

[MaxHeadRoom]

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.
Al.

[flyingmonkey]

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