Centroid Community CNC Support Forum

I am working on hooking up my Yuasa indexer to my little Atrump. I think I have everything figured out except one thing. I have to hook up four wires from the indexer to the Centroid PLC. The wiring diagram for the machine is file name "K0100117.S01"

Wire 928 to INP31 on input side of PLCIO2
Wire 929 to 0VDC
Wire 701 to OUT12 on output side of PLCIO2
Wire 702 to OUT12 COM on output side of PLCIO2

Wire 929 is the issue. I am fairly sure that it needs to wire to PS4, but I am not 100% sure and I am fairly certain it needs to wire to wire 86, but possibly just get terminated on terminal block 2, terminal 5B. Am I correct? I am not sure if "0VDC" and "-V (COM)" mean the same thing.

Yes, "0VDC" and "-V (COM)" mean the same thing.

There are probably several places you could make that connection. Assuming that your cabinet actually is wired as shown on that schematic, then any of TB2/4A, TB2/4B, TB2/5A, TB2/5B, or the COM terminal on PS4 itself would work equally well.

I thought you were on vacation.

oakes4501 wrote: ↑Tue Aug 25, 2020 5:27 pm I thought you were on vacation.

Let us know if you get it going.
Assume you have a DC1 and are suppyling the correct voltage to the indexer servo motor.....

I do not have a DC1.

I wired things as follows

orange wire-928 to INP31
red/white wire-929 to 0VDC on PS4
black wire-701 to OUT12 output
green wire-702 to OUT12 COM

I checked the wiring several times and gently pulled on all wire connections.

When I go in to MDI and execute a M12 the following happens

1. There is 24 volts over 701 and 702
2. Indexer indexes
3. 928 to 929 go from infinite resistance to a short, but no voltage
4. Machine times out on INP31

Yuasa's wiring diagram and there text contradict each other a bit. The UDNC remote port does supply 24 volts. The M-code finish does not. It is either a open or a short, no voltage. The text on page five agrees with this, but the wiring diagram on page four does not.

I think that I need to put wire 929 on the +24VDC on PS4. How ever I don't have a good fundamental understanding of how the inputs on PLCI02 work. I am hesitant to just do this because I am concerned about possibly burning out the input.

OK, so you have the UDNC control. In other words, you program the axis on the external control. Then it waits for a signal from the Centroid control to execute the program. When the program is done, the UDNC control sends a signal back to the Centroid control letting it know the move is complete correct?

Were you able to test the UDNC by issuing it the closure on #2 & 3, seeing if the UDNC executed the move, and then closed either 4&5 or 6&7

I have NOT set something up like this (if my assumptions above are correct) Hopefully Marc can give you some more insight.


Marty