CNC cycle not running

[BrendanDixon]

Hi All,

We had a machine breakdown where we found the I/O Link modules were faulty. We replaced this and also found some shorted wires that we repaired. What happens now is that the cyce start will not work. I see when we press the cycle start it gives a signal G7.2 to the CNC but the machine does not do any thing and no errors.

I also see the output from the CNC F000.5 is not coming on.

Can anyone advise what other signals I may require for the CNC to run its cycle?

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[BrendanDixon]

Hi All further to this. I checked G8.5 for feed hold and this is on.

[zavateandu]

look in the ladder and check who is making G8.5 on and what is holding the feed

[BrendanDixon]

look in the ladder and check who is making G8.5 on and what is holding the feed

G8.5 Is supposed to be on. If it goes off then the CNC Signal resets. I am trying to find out what other signals I need to take a look at.

[servtech]

Hi All,

We had a machine breakdown where we found the I/O Link modules were faulty. We replaced this and also found some shorted wires that we repaired. What happens now is that the cyce start will not work. I see when we press the cycle start it gives a signal G7.2 to the CNC but the machine does not do any thing and no errors.

I also see the output from the CNC F000.5 is not coming on.

Can anyone advise what other signals I may require for the CNC to run its cycle?

Given your earlier I/O link issues and wiring short, I would go back over everything, checking every current input and output to the wiring diagrams. I would also check the safety relays and functions, door closed and locked signal, tool and work holding etc,