[OkumaWiz]

I wonder about the wiring to the x servo motor years ago the connectors were bad so we hardwired to fix them. Hmmm

Based on your description, I'd be checking the wiring. The Stroke End Cancel alarm is usually generated AFTER a Stroke end over has occurred, and the overtravel release switch has been flipped ON. Once ON, you would usually go to manual mode, hit RESET, and then move manually with the pulse handle away from the tripped axis limit. Since you say that it occurred during a restart, and it's not overtravel, the machine "thinks" the switch is ON. Check the wiring to the overtravel release switch in your electrical diagrams and see if the switch is ON in your CHECK DATA, EC INPUTS. (They should be listed in your Maintenance manual.) Fix the switch to be OFF, make sure you're not on any limits like Algirdas says, and press reset to clear the stroke end cancel alarm.

On a side note, I think that vintage of machine may function like the E-stop is active if it is sitting on a stroke end limit, so you may want to ensure that you are not on one - they may be tied to the e-stop circuit. Of course nothing will move if in e-stop, but manual handle movement should be active when stroke end cancel is active and reset is pressed in manual mode. This allow you to get off the stroke limit.

Best regards,

[rotec]

thank you, I got it! Just some of my thoughts.

Typically when the machine does really over travel and hits a limit switch (or is that a soft limit?) one can hold on the over travel key, then reset, and using the pulse wheel manually back away from the OT switch. I've had that happen many times over the years.

On this machine when THE (1) E-Stop is tripped the machine completely shuts down, monitor black!. But I am not getting this condition so I cant see how an e-stop is in play?

However I think the machine is being tricked into thinking its in this condition. But then again if it were tricked would the LED in tape reader not indicate this and be ON? The LEDS are off.

The wiring to the X servo motor is not great, I can see the harness hanging down, we hardwired that motor years ago after all the terminals were all corroded. Its it possible that a wiring fault in that harness could be the cause?

Does this alarm come for both soft limits and hard limits ?

Based on your description, I'd be checking the wiring. The Stroke End Cancel alarm is usually generated AFTER a Stroke end over has occurred, and the overtravel release switch has been flipped ON. Once ON, you would usually go to manual mode, hit RESET, and then move manually with the pulse handle away from the tripped axis limit. Since you say that it occurred during a restart, and it's not overtravel, the machine "thinks" the switch is ON. Check the wiring to the over travel release switch in your electrical diagrams and see if the switch is ON in your CHECK DATA, EC INPUTS. (They should be listed in your Maintenance manual.) Fix the switch to be OFF, make sure you're not on any limits like Algirdas says, and press reset to clear the stroke end cancel alarm.

On a side note, I think that vintage of machine may function like the E-stop is active if it is sitting on a stroke end limit, so you may want to ensure that you are not on one - they may be tied to the e-stop circuit. Of course nothing will move if in e-stop, but manual handle movement should be active when stroke end cancel is active and reset is pressed in manual mode. This allow you to get off the stroke limit.

Best regards,

[Algirdas]

Soft limits are double: user and system. System axis travel limit is (should be) very close to hardware limit sensor. The reaction of overtravel any of these limits could be the same - you need to move axis away from the limit position or change parameter or move the limit sensor away. Parameter change and change position of limit switch of course, are not recommended.
Since no overtravel indicator is on, means, there is not a case of overtravel. For this age machine I think the indicators are related to hardware overtravel only. Software overtravel should be shown on the screen.
Normally the OSP should be responsible. The present condition indicates the overtravel cancel status is atcive. We don't know where the overtravel cancel switch is.
Maybe you need to turn and hold the key in the lock and move the axis ...
The machine is on, looks like waiting the axis move.
The wiring of X axis drive maybe has no inmpact. However, it's not good if there are corroded wiring terminals already. Contacts of connectors are corroded also. This could cause the control to be tricked into that state.
I would try to seek the docummentation of this machine. Too many unknown factors.

[rotec]

Hmmmm!

PAUL: The wiring on the X servo motor we fixed years ago because the terminals on that servo motor were corroded, we chopped them out and soldered the wires together. It may have nothing to do with it.


Maybe you need to turn and hold the key in the lock and move the axis ...
PAUL: I tried that days ago.

PAUL: , Is it normal for the end stroke cancel ALARM to make the control panel become non functional? and what normally would be done to clear this Alarm to free the control panel from being frozen?

[Algirdas]

Is it normal for the end stroke cancel ALARM to make the control panel become non functional?

We can't tell if it is non functional. Since the cancel of ovetravel procedure started ( as the alarm says ) many of other functions are disabled normally. It is normal, that nothing works but the axis movement. We don't know how to move - maybe some combination with push button or key in the lock together with manual movement knob.
On the other hand there is no overtravel. Looks like overtravel cancel mode is activated by mistake or mallfunction.

what normally would be done to clear this Alarm to free the control panel from being frozen?

We need to find out how the ovetravel cancel mode is turned on ( and off ) . Tricky, because we don't see any tumbler as a candidate. There are just clearly marked tumblers for that age Okuma's as ususal.
Maintenace manual of that specific machine would help a lot . . . or someone's advice who knows the procedure.
Why the OSP is frozen? Maybe it's worth so check if the "Auto" push button is not stuck. The push button can be stuck or dirty or whatever causing constant activated state. Extremely low likely, but easy to check with multimeter.
It is possible, that the problem comes from panel mallfunction.

[Algirdas]

not necessary defective. Some signals could be just inverted.

PSU (power supply unit). It was damaged and I replaced it

So, the question again. If you replaced PSU or Panel or both?

[defcom]

not necessary defective. Some signals could be just inverted.So, the question again. If you replaced PSU or Panel or both?

The 124 alarm appeared after replacing the damaged PSU, it disappeared only after temporarily replacing the panel with another one, that's how I know where the fault is. The problem occurs somewhere in the panel. Signals from the CNP-2 connector do not reach the computer PANEL INPUT

[Algirdas]

on the other hand, the message is nearly the same when the special code is used to bypass interlock. The "code used" means some special paraeter set to a special value in order to obtain some unusual function for maintenance.