Hardinge CHNC4 Retrofit

[lavrgs]

Since this is the first time I am running the repaired board do I need to reload the plc?

[cncsnw]

No. Your PLC program is stored on the computer's hard drive, and is automatically uploaded to the Allin1DC every time CNC12 starts.

[lavrgs]

I got the encoders sorted out and can see that they are operational via the PID screen. To get the spindle motor turning I had to force output 7. I have a picture of an old diagnostic screen, it did work as I recall,

I have yet to get the servos moving - I believe it's due to other errors but I will review the connections and check the fuses on the board.

UPDATE - Fuses are ok. I did move the servos prior to making connection to the board by applying a voltage. Is it possible to force the servos to move by overriding any errors?

[lavrgs]

I'm at a stall point. I have been unable to get servos to move - It must be something simple but I haven't pushed the right button....

[cncsnw]

Is your emergency stop contactor actually closed?

It appears you have INP11 forced in software, which suggests that you have not necessarily released the emergency stop button.

Assuming you followed typical wiring conventions, one circuit of the emergency stop button would close INP11, and the other circuit of the emergency stop button -- in combination with the OUT1 relay -- closes the emergency stop contactor.

With emergency stop released and any remaining Faults resolved (so OUT1 closes without having to be forced), does your emergency stop contactor close? If so, what voltage do you measure at the VM+ and VM- terminals of the Allin1DC?

[cncsnw]

Having INP1 - INP4 forced in software is also a red flag.

You should not have to either force or invert INP1 - INP4 (nor INP5 & INP6, which are unused and irrelevant on this machine).

Since this retrofit would not have any normally-closed limit switches you can connect to INP1 - INP4, you *do* have to toggle the limit defeater DIP switches ON, so that the servo drive does not inhibit current to the motors.

[lavrgs]

I have the blue housing for the defeat switches - do they all go up?

[cncsnw]

No. With the blue-housed DIP switches, ON is down, towards the board.

[lavrgs]

I will have to step back and check limit switches and any other items that restrict the servos. I am starting to wonder if the board was correctly repaired, is there a way to verify?

Is your emergency stop contactor actually closed? YES

It appears you have INP11 forced in software, which suggests that you have not necessarily released the emergency stop button.

Assuming you followed typical wiring conventions, one circuit of the emergency stop button would close INP11, and the other circuit of the emergency stop button -- in combination with the OUT1 relay -- closes the emergency stop contactor. I only have one circuit

With emergency stop released and any remaining Faults resolved (so OUT1 closes without having to be forced), does your emergency stop contactor close? If so, what voltage do you measure at the VM+ and VM- terminals of the Allin1DC? I measure 130vdc

[cncsnw]

If you do not have the limit circuits closed -- if INP1-INP4 are not green, without forcing or inversion -- then none of the axes will move.

You can close the limit circuits by connecting normally-closed limit switches; by wiring jumpers to DC COM; or by toggling the defeater DIP switches ON.