Fanuc 2S AC spindle motor on Delta C2000+

Hi All,

I have finally reached the point in my Kitamura CNC retrofit that i can get the spindle turning.
I got a Delta 3.7KW C2000+ (3PH 380v) VFD + PG-01H encoder card. But I'm having some interesting issues....

So My Spindle motor is an old FANUC 2S 2.2 / 3.7KW 200V 4P 1500/8000rpm spindle motor:
image missing https://i.imgur.com/Ahrup80.png
Datasheet link:  s3.amazonaws.com/Icarus/DOCUMENTS/Fanuc_Manuals_1791.pdf So what I tried is to first figure out if this is an AC induction motor or an PM motor. From what I can find (or not find in this case) anything in the datasheet so that made me think it is an AC motor as i feel no "dents" when i turn the motor by hand.
So I connected it all including the OEM Fanuc encoder signals the the VFD.
And then I went through the setup wizard, (immediately went for the complicated method) of including the encoder feedback etc.
When i tried to do a test run it just immediately jumps in OL3 error. I tried some of the advisement in the datasheet such as changing accel time or carrier frequency but that did not help.

So i went back to the basics and just put it in V/F mode. Max output voltage 200V , poles: 4 , max freq 267Hz , base freq 50hz (1500rpm) .
Now when i pressed run it turned, but it did not sound good. The current was around 17A's when it runs with no load on like 500rpm. I tried to set it to higher RPM but the high load pretty much states around. After a bit the VFD throws and overload as it is pulling too much current.

And now... I'm quite lost, any idea what I'm doing wrong? I have worked quite a bit with vfd's and never had such troubles so I'm thinking there is something fundamentally wrong. (this servo spindle worked well with the FANUC drive it had before).

After a quick run through i could not find any mention of induction or permanent magnet type.... Fanuc, that is really not nice.
Disconnect the motor from VFD, connect any two motor wires together and turn the shaft by hand, can you feel detent's and does it require more force to turn than when wires are not connected together?
If there are detents, it is a permanent magnet motor so it does not work with VFD, use a servo drive.
If it turns out to be an induction type, you can try settings on the VFD, there are several types of "drive modes" there, like Vector, triangle, sinusoidal, etc. These are just what i recall, been several years since i last set up a VFD.
Also, limit the current on the drive, you are using a 200V motor with a 380V VFD.

Moved to "milling machines" so ... is this a mill?

That Fanuc is an induction motor, not a PM.  They will run off a bog-standard VFD; the problem with Fanuc spindle motors is that they generally use a serial or proprietary encoder output that doesn't play well with 'standard' encoder inputs on drives.

First - disconnect your encoder from the VFD, and set the VFD to no-feedback.

The VFD 'wizard' should have an option to enter the basic nameplate data (FL amps, poles, ect.).  Try using that in V/F mode.

I've got a Mitsubishi SJ (similar to your Fanuc) I'm running off a GS3 VFD.

EDIT - Tommy's right.  Your voltage is wrong.  That's a 200v-class motor, can't use it with a 380v VFD unless the VFD can be programmed to drop the voltage to a different class.

EDIT 2 - DOH! See later post

trying VF control with lower voltage base , ex 150v
fanuc spindle use SIN COS encoder, it is not incr ABZ encoder

regards

The VFD is programmed to output 200V max. It is indeed a SIN-COS encoder and that works with the PG01-H encoder card that i use.
But when running in v/f mode this is not used anyway.

"The VFD 'wizard' should have an option to enter the basic nameplate data (FL amps, poles, ect.).  Try using that in V/F mode."
I did this, it just runs very rough, not how it used to run before at all.

My VFD can run all kind of setups including PM ones. One thing that makes me think it is PM after all is that the torque curve is basically max torque from 0rpm and goes down from there + It runs like shit in V/F mode as an induction motor.

I'm kinda tempted to just throw in in PM mode and see if it changes. Cause this does not seem to be it at all.

In a video on yt regarding a brother update they also set it to PM mode. The motor looks to be the same frame style as mine: