I’m going to take my boss’s ohm meter home today if possible.
I figure you’re going to want me to hook up my rotary, and measure with the probes at one end on the stepper driver block on the laser and on the other end, measure with the other probe on that white 6 wire block to each of the 4 wires to see which one has continuity back to the stepper driver block?
Ok, so dummying down for me, I put 1 probe on A+ on the stepper driver on the laser. I probe each pin on the aviator plug at the other end in my laser. So I’m basically identifying what wire on the stepper motor driver inside the laser, matches up with the pins on the aviator plug. The aviator plug is numbered 1 though 4 on the black plastic end that the wires are soldered into.
Then measure A-, B+, B- and so on…
At the end of this, I should know where A+, A-, B+, and B- ends at the aviator plug and to what pin numbers.
Of course, with an ohm meter, the machine needs to be powered off.
Personally, I’d plug the rotary pigtail into the Y axes without the motor. Use the ohm meter on the motor driver A+ and check the BLACK wire where it plugs into the motor. You can then check A- to see it it goes to the green wire… Similar with the B windings, B+ should go to RED and B- to Blue.
set the dial nearest the Jaws for 2000 OHM ( it’s a Greek Letter Omega )
you’ll see a 1 on the far left of the screen or NC for Not Connected or No Continuity.
The wiring diagram Jack offered is really useful. The four motor wires are connected to the two coils inside the motor. The two coils aren’t connected to each other so each wire will have one partner. Once we know which pairs feed one coil or the other the motor can be Connected. If there’s an error and the motor doesn’t move reversing one pair of coil wires addresses it.
Do an ohm meter check for continuity between A+ and A-… Need to do this on the motor side… It might be easier to either use the probes on the connector part if you can get to it. You might have to remove the connector on the motor and touch them with the probes.
I’m wanting continuity between the inputs to show it is either A+, A-, B+ or B- phases.
If you look here… Red + Blue are one phase and Black + Green are the other.