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My guess would be vibration is causing the unclamp switch to flicker. Okuma had this problem many years ago on some crowns. They soft mounted to switch and problems went away. Maybe or maybe not your problem.
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I've been having issues with our new Genos(tm) L300-M from Okuma. The machine is great and runs well, when it runs! I had an issue after drilling a hole thru the center of an aluminum cylinder where the turret tried to rotate, made a clunk, then gave me an alarm 1784-01 (Turret clamp time over). I could clear the error and try to rotate the turret again but it would do the same thing over and over again. Being that the machine was brand new I didn't want to tear it apart and void the warranty, so I called our tech guys and had them come fix it. The first guy thought he fixed it but left us with an improperly oriented turret which caused my M-Tools to chatter when run above 1000rpm. The second guy did a great job re-aligning EVERYTHING on the machine, so we thought our problems were over.
Today I was creating a spindle sleeve to run some 1.5" steel stock and had to, once again, drill a hole in an aluminum cylinder. I drilled thru with a 5/8" drill bit then again with a 1.25" bit and was preparing to run a boring bar through it when I got the same error 1784-01. The turret rotation is misaligned by 1 or 2 degrees, but the X and Z faces are aligned perfectly. I can't even see the needle on my 5-tenths indicator flinch when indicating the two faces. Also, I noted the maximum loads during the drilling process. The M-tool torque never exceeded 67%, the Z-axis never exceeded 7%, the X axis never exceeded 28% (but usually rests at 26-30% anyway) and the C-axis obviously didn't see any load since I was drilling with the M-tool.
Has anyone ever had issues like this with the L300 or ANY other machine? I refuse to believe that I am abusing the machine by doing what I am doing, especially considering that the turret is still perfectly aligned in X and Z. Anyone with thoughts please chime in. I've had the machine down for 2 days last week and it looks like I'll have it down for at least one more this coming week, it is really starting to ruin me. Thanks for any info anyone can provide!
My guess would be vibration is causing the unclamp switch to flicker. Okuma had this problem many years ago on some crowns. They soft mounted to switch and problems went away. Maybe or maybe not your problem.
hmm, I think my problem is more complex than that. From the sounds of things, the clutch is actually misaligned and cannot engage/disengage properly. I just cant figure out how manually drilling through aluminum could possibly cause this problem. I was wondering if anyone else had the same problem in the past or currently. Thanks for the input!Originally Posted by underthetire
only one suggestion. It applies if the hole You're drilling is out of center of the chuck. Must be, otherwise You don't need M tool to drill it.
Your main spindle is not clamped properly. Either no C axis clamp command (only C axis engage) issued or some hardware clamp problem.
details:
1. C axis engagement (M10?) is not enough. You need to clamp C axis (the main spindle) issuing C axis clamp command (M147?)
2. Bad clamping could because of:
- brake disc deformation or misalignment
- wear of brake pads
- some braking unit assembly problem
- hydraulic pressure problem
Hello,
we have got also a new Okuma Genos L300 E in September/Oktober 2011.
Not using the maschine heavily (we didnt use active tools - M-Axis), we got the error Alarm 1784-01 Turret unclamp errorthe first time in November .
An tecnican came and fixed the turret.
After 3 weeks we got this error again. And like you described the
technican came again and fixed and alligned the turret again very accurately.
Last saturday we got this error again and today a technican
will come to us to fix this error.
I hope he will find the cause of this error.
I agree "The machine is great and runs well, when it runs!"
Could you fix this error ?
Could you find a cause for this error ?
On the piece of dog snot I program/operate (not a Genos but with a similar turret) I had the 'turret clamp time over' error once.
It was caused by a tapered ring connected to a shaft that detects the movement of the central hydraulic piston inside the turret. the ring had moved slightly and was not located in the ideal position to touch the clamp micro switch. a small adjustment of the ring location and re-tightening fixed it.
If a technician comes in to fix it I suggest you watch him then you will know what he did.
"The machine is great and runs well, when it runs!"
Hmmm yes. This sums up Okuma in one phrase
In the last error the turret was in a position where the Tool No 1
was in the work position, but in the control was tool No 2 in display.
there's a parameter/setting to re-set the turret servo to the correct tool number.
The technican is here. The turret was in the wrong position.
The turret was mechanical wrong. The cause is still unknown.
He is searching the cause.
Meachanik seems OK.
Maybe a software Problem.
We didnt find a cause.
The mechanican fix the wrong position of the turret.
The machine is now running again.
We dont know exactly the cause of the malfunction.
I would like to get in contact with japazo.
I email him, but got no answer.
two causes could be only:
1. a hit. It's posible to find a hit track at that case. Broken tool, scraped workpiece
2. play with the Emergency button. If you catch the moment of tool change, when turret is unclamped and hit the Emergency stop, you get turret unclamped and rotating freely (by finger, for instance)
Note: the same result is in the case, when tool X outlet is too long. The long tool hits the cover during turret indexing and the turet looses it's position. The hit mark on z axis cover.
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