bandit controller retrofit

thank you very much for the answer, but I really don't understand how to check it, I only know in the case when drivers , old amps` are appeared with an analog input +-10v. Yes ,that this is probably a signal ribbon cable from controller board to driver.

Try this:
Remove 1 driver, unplug its motor, and remove the motor socket socket from the chassis.

Examine where the socket leads connect to the driver's PCB.

Thick traces are probably motor winding connections, thinner ones are likely signal/optointerrruptor connections.

Now separate the socket leads for the motor windings from the driver and use an ohmmeter to determine their configuration.

Brushless DC motors are probably 3-phase.
There should be 3 or 4 thick wires.

Buy a single servo drive (can be cheapish).

www.aliexpress.com/item/1005005356039290.html

Once you have purchased a driver, probe the non-motor-winding motor socket connections with a voltmeter (between driver logic ground and between each other).

There should be: A VCC wire, a GND wire, and a signal wire (use the 4520B counter circuit to detect the pulses).

Maybe there are 4 wires:

1xVCC
1xGND
1xSIG
1xVCC or GND or NC

Those are step motor drives, 8A max
No idea how they are interfaced but
maybe worth a bit more searching with 
the drive PN:

214 072 01d

www.radwell.ca/Buy/ALLEN%20BRADLEY/SUMMIT/214-072-01

May also be useful:

www.ass-services.ch/file/img/Ersatzteile...anditI&IIaktuell.pdf

Might be the service comnpany listed on the board!

These things seem to be fairly common actually.

You can't find any schematics cuz they are proprietary.

(actually, you can find schematics for any other drivers either)

Here's a thread of someone else doing a similar retrofit:

www.cnczone.com/forums/uncategorised-met...253-engineering.html

The existing drives are 2 phase, unipolar, and 8A 
(Unipolar is why they have 6 motor wires because each winding has a center tap)

I think the forum suggestion is good: Replace the drives with standard bipolar
stepper drives but since the windings  are wired in series for a bipolar connection,
use the highest voltage capable drive you can get.

(this assumes you want to keep the motors)
 

Perhaps try this: www.aliexpress.com/item/1005005965707719.html

Also, it's possible the motor is actually 2-winding internally.

Open up the motor wiring box and see.

You might be lucky!

They are 2 winding type, that's not in question.
There are 6 connections because unipolar drives need
windings with a center-tap. You would ignore the center tap
when using a bipolar drive (series connection).

Note that when using this series connection you would
lower the drive current (so say 4 A instead of 8A)



 

I know they are 6-wire, but perhaps they are 8-wire internally.