[dws35]

We have a LU400M with an OSP E-100L control. We are running a part as follows.
Load part.
Start cycle.
Machine 1st side features.
Stop at M0.
Flip part around.
Re-start cycle.
Unload.

Problem occurs when operator forgets to flip part and re-starts program causing a crash. Is there a way to monitor the chuck status and reject the re-start if a un-clamp / clamp event has not occurred. Open to any suggestions to prevent this crash from occurring.

TIA

Sorry for the double post, I did not think the first one went thru.

[underthetire]

If it's a consistent job, and you can get away with it, machine the chuck jaws so when they open, it will still keep the part from totally falling out. Then at the end of the first cycle, command M10 or M11 (chuck open). Then the operator switches the part, and closes the chuck. If he doesn't remember to, the machine will at least see a chuck open signal and not allow the program to re-start.

[Superman]

You could also use the same senario with the tailstock, have the program retract it.
program would not continue until the ready signal for the tailstock advanced is accepted.

[Tennessee]

I have had the same scenario and tried a few things to fix it before finally just having them run the first op on all parts then the second. The chuck needed to be clean before running second side so really didnt add time to the job grabbing another part.

[budgieW]

Maybe try

N200 IF[VORD[1138] EQ 0]N200 (CHUCK CLOSED CHECK)
(OPERATOR OPENS CHECK HERE)
M00
(THE OPERATOR NOW CLOSES THE CHUCK)
N300 IF[VORD[1138] EQ 1]N300 (CHUCK OPEN CHECK)

BLAH
BLAH
BLAH

[OkumaWiz]

Use budgieW's chuck open command check to loop the program and keep it running until it sees the chuck open command. Once it sees it then go to your M0 command. that will prevent the cycle start from doing anything until it sees the chuck opened in the middle of the cycle.

Best regards,

[dws35]

Tip o' the hat to Okuma Wiz and BudgieW. Putting those 2 suggestions together gives me what I need to put together a plan.

Thx again.