[kmcwhq]

Early 90's VMC with 0M control......considering a retrofit to MACH 3....

Motor Questions

Fanuc Red Cap SPINDLE motor
Motor numbers: 8P A06B-0725-B102#3000
200Volt 5.5KW 4 Pole 3Phase 6000RPM

Spindle Drive is A06B-6059-H206


.....CAN THIS MOTOR BE RUN WITH A 'typical' VFD?
Maybe with a quadrature encoder fitted to the spindle instead of the 'special' Fanuc encoder?
There is no transformer, and it appears the drive input is 230V 3Phase even though the motor says 200V ???


Red Cap AXIS motors:

X&Y
5S A06B-0314-B002#7000

Z
10S A06B-0315-B002#7000
3 Phase 8 pole 12NM 7.6A stall

....CAN THESE MOTORS BE RUN WITH 'typical' smart AC Brushless drives that take step & direction commands?
I realize quadrature encoders need to be fitted to them, but do I also need Hall sensors?
The drives I am looking at are Yaskawa or TECO.

Thanks.
dan K

[Al_The_Man]

The spindle motor should be able to run on a VFD, if you want close to the original control you need to fit an encoder on the motor shaft.
I have previous posts on converting the servo's to DCBL, Renco have encoders that can be used 35i series, you need /4 commutation types (8 pole).
Fanuc is all 200vac due to 200v used in Japan.
Al.

[kmcwhq]

Thanks for the reply Al,

The spindle has an encoder on it, and I have a Baldor 10HP drive that takes encoder feedback, so that is what I am thinking of using.

As far as I can see, there is no transformer in the machine to take the 230v to 200v....?
Does the Fanuc Spindle drive do this?
Will the Fanuc spindle drive accept +\-10V analog input signals? If so, I guess I could use it and not replace it.

On the axis motors, I am not clear what you mean on the encoders...../4 commutation types....?
Do you mean quadrature?

Can you point me to your posts on converting the red caps? I searched but found nothing.

Thanks!
dk

[Al_The_Man]

Here is one such link from post #8 on
http://www.cnczone.com/forums/showth...ght=star+point
Some Fanuc spindle drives are ±10vdc you would have to check this.
The R35i Renco encoders are available from 100 to 10000 p/rev.
The /4 indicates pole pairs, IOW for a 1000p/rev 8 pole motor the designation would be 1000/4, four electrical commutation cycles per mechanical revolution.
I used a machined shoulder bolt available from Misumi USA in place of the original allen screw that secures the Fanuc encoder, a circular mounting plate has to be fitted to mount the encoder to.
The Renco are through hole encoders, hence the need for a machined extension bolt.
Al.

[kmcwhq]

Reviving an old post.......

Al the man....

I hooked up a small Mitsubishi 5hp vfd to the spindle motor yesterday.
The motor did not run very well at first with the default parameters.

Then I set it to V/F or vector mode and the motor seemed much happier, but the one question I have is that the current draw shown on the VFD was about 11 amps at lower speeds. It did not change until I turned up the Hz setting and then it went down a bit, but not much.

Is that normal?

Also, I wondered if this spindle motor has permanent magnets on the rotor or is more like a conventional AC 3Phase motor?
If magnets, does that mean the motor requires commutation signals?

The Baldor drive I plan to use will use encoder feedback.

[Al_The_Man]

The P.M. motors will not run with a standard VFD, you need a A-M-C or similar BLDC drive and you need commutation sensors or encoders with them on.
To test if the motor is PM, short the 3 stator winding conductors together and try and spin the shaft as fast as possible, it should brake at every pole.
Al.