I guess I need to post something on topic for the group. Last week I was working on a Mazak Multiplex that lost the ability to index the turret. It is always fun doing a multishift repair since two of our shifts don't write a freeking thing down to give you an idea of what was tested and what was learned. It seems you work 4 hrs go get back to where things were when you left the previous day.
Anyway, the first night I worked on it, I noticed the turret clamp/unclamp switch wasn't going off when unclamped. Wasn't all that worried because we hadn't got that far.
The mill/turret motor just wanted to spin and give an error I forget now.
In the morning I passed down the info I had learned and we talked a bit the day tech mentioned that mazak said that shifter has to shift to turret side before unclamp. From that we figured that Mill/Turret motor orients and is under control to hold position, The shifter system moves from mill side from turret side and meshes gear, then the turret can unclamp since servo is going to hold it. Then motor spins turret to proper position, clamp, yada.
Well a day goes by since we don't have the motor and then the next day we have one. We evidently had a motor and didn't know it. Inventory is a serious issue where I work. It isn't walking off, we just can't track it.
The prior shift tells us the motor is in but the valve that shifts is bad. That made no sense since we checked that out earlier.
Oh well, pull up diagnosis screen look at bits, Shifter output doesn't match position prox inputs. Find out someone swaped sides on shifter valve.
Once again we try to index turret. No go. 239 and 330 condition 4. Chit. Looking at bits, I find that the pneumatic coupler that connects to live tools does not show retracted. Folowing wiring, we find that someone improvised a connector and it wasn't making contact. A little crimping fixed that.
Try again, get an alarm about turret clamping. Hey no chit, I was hoping to get there. That one was expected. Crawl in back, screw prox out a turn, guess it got more sensitive since the rod and disk are moving the proper amount.
Try again, index's fine.
Now if I can figure out the taper problem on the GI-20 grinder this machine feeds I will be very happy. One of those deals where the machine you fix isn't all that useful if the machine it feeds is down also.
Wes S