[tnik]

machine: 1988 daewoo puma 12 with fanuc 0T control
serial: coco puffs.. lol # 420096

I posted this on a.m.cnc, but figured I'd mirror it here..

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OK, this is really starting to hurt.. Some of you may remember that we bought a daewoo puma 12 a lil while ago.. We had it up and producing parts and all of a sudden the turret decided to get lost. Tried everything and eventually found out that a couple bolts on the inside decided to just give up and throw their heads off. So, got that all fixed and ready to put the turret back on. Well, the turret can go on 2 ways.. So we boot it up, tell it to do a tool change, it moves, then it won't do it again. Only way we can get it to do another tool change is by a reboot.. Now our trustworthy machine fixer upper guy has been out here alot longer than he should be.. We have some diagrams, and books but their not helping at all so I'm pleading to you guys..

Does anyone here know anything about how a daewoo knows what tool it is currently on?

Oh, I did forget to mention, after it does a tool change and wont do another, there is no alarm at all..

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Hope someone can shed a bit of light on this for me..

[von007]

1988 that's an oldy lol. Here's a couple questions to start
back in the day they (older machines were using limitswitches intead of encoders to keep count) is this the case?
Or is it encoder ?
If your machine doesn't see a clamp confirm for the turret it's possible that it would just sit there with no alarm. Check the clamp un clamp limit on back side of turret.
Also be aware that when that turret is removed it must go back on to th same splines it was removed from.
Will it work properly( tool change without the turret on)?
Gl

[MysticMonkey]

What von said


encoder handles the positioning

proxy signals it is unclamped


some times the motor breaks a vane / becomes leaky and you get under shooting on the position

[tnik]

Well, we finally figured it out yesterday.. The turret had 4 switches for 10 tools.. A round bar is on the end of it and at any given time in position 1 of the switches was open. The gear was a few teeth off, and two of the switches got reversed somehow.

Thanks for all the suggestions.

Lesson to all, make sure you keep the documentation.. Especially for the old machines, it was a total pain getting the correct ladders..