Need help identifying a huge CNC Spindle Motor

[cheetahcnc]

This is a spindle motor I recently picked up at an auction. It was new, still mounted to the crate, and heavy! I would like to use this for an aluminum extrusion cut off saw I am building, if I can identify it and it's power requirements. It has a special toothed wheel for the encoder, and one trigger which is about 1/16, 1.5mm longer then the machined teeth, and nine wires. There are no ID plates on this at all, but the parts do have numbers etched on them, possibly part numbers. The shaft is hollow, all the way through with a brass plug(?) in the end near the encoder. The electrical box has a connection block with three #8? red wires and a green, plus two small blue wires - probably for a thermal switch inside. 10", 250mm wide and 21", 530mm long. Photos:







Jim

[Al_The_Man]

It looks very much like a Mitsubishi/Mazak frame-less spindle, if so it it worth big $$$, especially if new.
These types were often liquid cooled.
Al.

[cheetahcnc]

I unbolted this from the factory crate myself. Is this servo?

[Al_The_Man]

If a frame-less spindle, then it is a 3 phase induction motor with pulse generator feedback to the drive.
What are the numbers on it?
Al.

[cheetahcnc]

Thanks for the info Al!

There is no plate at all on this, just etched numbers on the individual parts. You can see some numbers in the second and third pic. I have 200 amps of 240v three phase, and 10hp vfd's, but this thing might be 20hp (60 amps @240v), and not sure of it's voltage. That's an awful lot of amps to be "testing" with. I'll open up the back cover and get a pic of the toothed wheel encoder, or pulse generator, if it might help with the ID. It is definitely a fixed voltage motor, with three power leads. I can remove the cap plugs on either side of the encoder housing to see they are for coolant.

[cheetahcnc]

Resistance in between the large power leads is 0.1 - 0.2 ohms. Resistance between the two blue wires is 240 ohms, not what I would expect with a thermal cut out switch, mabey an RTD?

There definitely is an "M" within a circle on the electrical housing and the main body above and to the left.


Lightweight clear oil started to seep from this plug when loosened:


Possibly a threaded coolant hole? One on each side:


The encoder/pulse generator:

[Al_The_Man]

A thermal switch is normally 0 ohms so it most likely is a TDR.
The stator readings are about right, but the rpm sensor does not look like the typical one fitted to a Mazak, I could not make out the name etc on the sensor?
Al.

[cheetahcnc]

Sensor:
lenord+bauer
dohlenstraBe 32
D-46145 oberhausen

These numbers are on the silver toothed wheel:
L/29-007 3.0360045.0

[Al_The_Man]

Fanuc/Mitsubishi/Mazak mainly use Japanese components, so it could be off a European machine.
Al.