5C Komori Electrical problem

Have a 5 color Komori that's been a good press. We've experience an intermittent problem. Press will shut down and can't be restarted. Will inch, run on inch, but won't restart. Sometimes happens after press is stopped, other times happens during running. No errors on board.

Problem comes & goes. Pressman shakes gates over plate cylinders and sometimes restarts. Had Komori look at it, found no problems.

Any ideas?

 

Is it possibly a bad earth somewhere on one of the microswitches on one of the guards?

 

I take it there's no led lit up on the Safety Monitor? Next time it happens try turning all the damp motors off and try to run press (clearly don't engage the dampeners!). If it runs then it could be a faulty sensor on a damp motor encoder.

 

I agree with RichardK, to look at the damps, look at the electrical cabnet were the boards that control the damps. There are fans that cool the boards and their at the bottom of the board, the spray powder builds up in the bottom of the cabnet and stop the fans from turning.

 

oil pressure maybe? does it happen more in the morning

 

If you say the pressman shakes the gates and it restarts, have him wiggle the wires to the micro switches on each gate until he gets it to run. One bad wire on one gate is all it takes.

 

I agree with John A.
The most common cause of phantom stops is a broken or shorted wire going to the safety switch mounted on the gates. If the press will creep in Tune Up mode, that will confirm that the gate safety circuit is the source of the problem.
Closely inspect the wiring where the cable makes the bend on the gates. If no breaks can be seen, it is still possible that a wire inside the cable is broken. With Tune Up off, try flexing the cable while repeatedly pressing the Ready button to see if if the horn will sound.

 

Same thing this happened this morning. We came in this morning after a 3 day weekend for President's Day and press wouldn't start. No errors on safety board. Went through every gate and each one registered an error when opened. Pressman walked away for 3 minutes to look at jobs scheduled for the day, retried press and it started. Calling in Komori, if that doesn't work I'm going to have to break out the Holy water.

 

I always like to look for the simple solution first, so there is a rubber coupler that connects the motor to the oil pump, what shape is it in? Is there a light for the oil system on the monitor? And check out the oil pick up, any blockage? The pump makes noise, has that changed lately?

 

@FSA, hmmm, don't think the oil pump's the culprit. Usually when you get low pressure or blockage (rare, never had one block) the siren sounds and the press won't run at all.

Shame the pressman didn't try the press straight after moving the guards...it injects an element of doubt as to whether a component is failing or whether it's a damaged wire/micro - or maybe just a micro out of position relative to the actuator cam.

 

Problem found. Komori sent over a tech. Bad sensor in the plate gate on unit closest to delivery. Part
on the way.

Thanks all.

Mike

 

i was have the same problem with lithrone 440 it was a bad sensor of the auto plate changing.............when machine stops again check for a red light in the control APC on the units........may its the same ..........hope that s help