Red Cap Fanuc Motors (late 1990's early 2000's) w/ LinuxCNC and Single Phase?

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12 Jul 2018 17:35 - 12 Jul 2018 17:37 #114078 by FDP
Hi Jon,
I just got pics in of the motors & control.

The control is a Fanuc 21iMA (Type A02B-0247-B545 from late 2000).

Two of the servo motors are model alpha 2/3000rpm from late 2000 (0.5kW cont. output), one is a model alpha 3/3000 from the same year (0.9kW cont. output).

The spindle motor is an alpha 1.5/15000 from the same year.

My understanding is that the 21-iMA control does not have axis drives that support the alpha i servo amps. The motors should have an amphenol connector on their encoders (didn't get a pic unfortunately).

Unfortunately I won't be able to inspect the electrical cabinet myself for a few weeks to get further info, although I may be able to get some more pictures if that helps.

Kind Regards,
FDP
Last edit: 12 Jul 2018 17:37 by FDP. Reason: Added info

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13 Jul 2018 01:25 #114098 by jmelson
Without more info, I can't even tell whether the encoders are old style with classic ABZ and proprietary commutation, or serial pulse coders which are totally proprietary.
I think I (Pico Systems) have converters for both types (but need the model # to be sure). The motors should have an A06B-xxxx-xxxx part number, which should specify this. There MAY also be a label on the encoders, but many Fanuc motors do not have such a separate label on the outside.

Jon

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13 Jul 2018 04:13 #114108 by FDP
Thanks, sorry, I would have just supplied the pics but I didn't have them handy. The Model #/Motor spec #'s are:

A06B-0373-B075 for the alpha 2 models and A06B-0123-B175 for the alpha 3 axis motor.

The spindle motor is: A06B-0871-B390#0040 (the first letter A is obscured in the pictures I have, but it seems like a fair guess).

Thanks,
FDP

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13 Jul 2018 15:08 - 13 Jul 2018 15:13 #114132 by jmelson
Wow, there's some real confusion here! The A06B-0373 shows up in my cross reference as a 1-0SP/3000 motor. The A06B-0123 does cross reference to an Alpha 3/3000, so that one checks out.

(A quick look at labels on eBay confirms that there are two "models" with the same "part #". I had no idea that Fanuc ever did this.
The specs on the motors look about the same, though.)

Anyway, the last 2 digits are the encoder type, and 75 means an A64 serial pulse coder. This gives 65,536 counts/revolution, and produces low-res absolute data immediately on power-up, so you don't need battery backup to have commutation data for the motor.

So, the Pico Systems serial Fanuc converter is suitable for these motors.

Jon
Last edit: 13 Jul 2018 15:13 by jmelson. Reason: more info

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13 Jul 2018 19:45 - 13 Jul 2018 19:46 #114143 by FDP
Thanks Jon!
I'll get in touch this coming week about ordering parts. I won't have the machine on hand for a few more weeks, so there isn't much of a rush on my end. I'll try to work on the wiring diagrams for the retrofit. Do you have any white papers or implementation guides on your site (I couldn't find any easily).

I was thinking of using Copley Xenus drives for the servos (I have one or two left over from another project where I never used them), it looked like your hardware is compatible with these?

Do you know what is involved in properly setting up the spindle for rigid tapping?

Kind Regards,
FDP
Last edit: 13 Jul 2018 19:46 by FDP.

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