glbreil
Cast Iron
- Joined
- Feb 10, 2008
- Location
- McLeansboro, IL
Hello Everyone, I am getting a Bad Collet Switch Alarm on an old CHNC II with a Fanuc 10TF control.
What actually causes the alarm is that both the open collet and close collet signals are engaged at the same time.
I have determined that it is not the switch. I can completely unhook the membrane switch and nothing changes.
I can jumper the collet solenoids and make it operate but I can not get it to change in the machine.
I have some spare parts so have tried a number of things. From the control panel where the switches reside it goes to and A16B-1210-0480/02A DIDO board and I have swapped it with no success from there it goes through a ribbon cable to a large board on the the back of the CRT and from there is is fiber optic to the rack and then fiber optic to another DIDO board before going to the actual collet relays.
I can test voltages at the last DIDO board and see that both open and closed are energized. I swapped that board as well with no luck.
I could swap the board on the back of the CRT/MDI board I think it is called, but I am grasping at straws.
I am hoping some of you have had a similar problem and might have some ideas.
If I could get past the alarm I would just put a separate switch on to operate the collet closer, but it will not do anything at all with the alarm present.
Would appreciate your thoughts.
Thanks Gary Breiling
What actually causes the alarm is that both the open collet and close collet signals are engaged at the same time.
I have determined that it is not the switch. I can completely unhook the membrane switch and nothing changes.
I can jumper the collet solenoids and make it operate but I can not get it to change in the machine.
I have some spare parts so have tried a number of things. From the control panel where the switches reside it goes to and A16B-1210-0480/02A DIDO board and I have swapped it with no success from there it goes through a ribbon cable to a large board on the the back of the CRT and from there is is fiber optic to the rack and then fiber optic to another DIDO board before going to the actual collet relays.
I can test voltages at the last DIDO board and see that both open and closed are energized. I swapped that board as well with no luck.
I could swap the board on the back of the CRT/MDI board I think it is called, but I am grasping at straws.
I am hoping some of you have had a similar problem and might have some ideas.
If I could get past the alarm I would just put a separate switch on to operate the collet closer, but it will not do anything at all with the alarm present.
Would appreciate your thoughts.
Thanks Gary Breiling