I was working on a Mori Seki lathe with a fanuc 16? in it last night. The complaint was that chuck was still spinning down when the door latch unlocked.
So I went to MDI, did a S1000M3 and hit the go button. Then a M5 followed by the go button. I kept testing door latch and when indicated spindle speed went to zero, the door unlatched.
The operator told me that the chuck is spinning the other way when he opens the door.
So I tested again using M4 instead of M3. When I executed the M5 to stop, I could open the door while spinning down through 90 rpm.
Absolutely repeatable. M3 direction stops work fine, M4 seem to coast with an early door unlatch.
So I tried:
S1000M4 S0 M5
The chuck stopped just fine. Just as quick as doing the S1000M3, M5 and I couldn't open the door until spindle stopped.
Since they usually open the door at a certain point where they disable loader to do insert changes, I inserted a S0 before the M5 as a work around but I'd love to know what to look at to fix this. The other same type machine in cell works normally in either M3 or M4 direction.
Thanks,
Wes S