Centroid Community CNC Support Forum

cncsnw wrote:First remove all 240VAC connections to and from those five Koyo outputs.

Then you could, for example:
- Connect VFD/CM to Y31 COM (C1 on output module 2)
- Jumper Y31 OUT (NO1 on output module 2) over to Y37 COM (C7 on output module 2)
- Connect Y37 NC (NC7 on output module 2) to VFD/DI1
- Connect Y37 NO (NO7 on output module 2) to VFD/DI2

That way, when Y31 is off, both DI1 and DI2 will be open and the motor will not run.
When Y31 is on and Y37 is off, DI1 will be closed and the motor will run forward.
When Y31 is on and Y37 is on, DI2 will be closed and the motor will run reverse.

Wkoenigs wrote:I was rereading your post about wiring. When you said to disconnect all 230vac to and from those 5 outputs does that includes wire 52 and 54?

Yes, you need to remove all the old wires that were connected to those relay terminals.

Ok so I did understand the wiring correctly, I double checked my connections and they are as recommended.
When I push the carousel + or - it lights leds on the Koyo output 2 they stay lit until the e stop is pushed.

If output #1 on the second Koyo output module is on (its "1" LED is lit), but the carousel is not rotating, then there is something wrong with your VFD wiring or VFD parameter settings

Does the carousel motor run when you jumper "CM" to "DI1" directly at the VFD?
Does it run the other way when you jumper "CM" to "DI2" at the VFD?

Did some adjusting on the gs1 parameters. The carousel moves a little then I get an oc alarm on the gs1.
So unbolted motor to remove any extra load and the motor shaft spins for a second and the oc alarm pops up.I can’t turn the motor output shaft by hand wondering if the carousel motor brake is likely?

Probably. The motor may have a brake that is released using two legs of the 240V power to the motor.

If the VFD is ramping voltage and frequency up gradually over several seconds, then it will be trying to move the motor before the voltage is high enough to release the brake.

You may have to either mechanically remove the brake and just rely on the GS1 deceleration; or separate the brake wiring so you can power the brake with full 240V via a 2-pole relay (in turn controlled by PLC output Y32 or Y34).

However, you could also try setting a very short accel time in the VFD (maybe 0.1 seconds?) to see if it works to just get it up to full voltage as quickly as possible.

The sticker on the carousel motor says the brake is 90 vdc would that change anything that I should check next?

Can you tell how it used to get its power? Are there more than four wires (3 phases plus ground) running to the motor?

A common cheap way to get approximately 90VDC is to run 120VAC through a bridge rectifier, with no smoothing capacitor. Do you see anything that might be a bridge rectifier in, on, or near the carousel motor, or in a terminal box behind the tool changer?

Well took the brake off the motor it didn’t help still starts to spin then stops. I’m guessing bad motor or bad wire to the motor

Yes it has 4 wires to motor (3 phases & ground). In the terminal box by the tool carousel it does have a rectifier that goes to the brake. I found that in that wiring there is a varistor ( I think that is what it is called) it looks like it is blown out. I unhooked the wires that go to the rectifier And now my carousel will spin.