tntcustom
Aluminum
- Joined
- Jul 29, 2009
- Location
- stow, OH USA
OK, Have a 18" chuck lathe that we bought new in about 2016-2017 IIRC. It has always cut well, with no alignment issues. Although we have never physically checked turret slot alingment, we check drills and boring bar holders regularly and they have always been within about .001 or so.
We had a tool break and move the turret out of square, so we squared it and checked the boring bar, good, so we ran again.
Then it seemed inconsistent on size, which has never been an issue. We removed the whole turret back to the curvic, and found chips inside(swarf). cleaned and the tech put it back together and he trammed the stick tool slot and left.
We setup a centerdrill and it was of in "y" (a 2 axis lathe so there is no y axis) almost .120"
We trammed the boring bar holder same thing, checked the tool slot its 0.000"
HAd the tech come back, and he re pulled the turret, rechecked all the tapered pins, and put all the pins back in, and the boring bar pocket is perfect 0.000, but the tool slot is out .025", he pulled the pins, and aligned the slot, back to .120 out on the CD. put pins back and its 0.000
Now, has anyone ever had a turret where the 2 dont agree? the tech, dealer service manager, and Machine Tool Dynamics people all agree it shouldnt be possible, unless the MTB didnt shim the turret correctly from the factory.
As a note, the headstock is aligned with z within .001" over 16" on a 4" daimeter bar, and the tailstock and headstock are also within .001 on the same bar.
We had a tool break and move the turret out of square, so we squared it and checked the boring bar, good, so we ran again.
Then it seemed inconsistent on size, which has never been an issue. We removed the whole turret back to the curvic, and found chips inside(swarf). cleaned and the tech put it back together and he trammed the stick tool slot and left.
We setup a centerdrill and it was of in "y" (a 2 axis lathe so there is no y axis) almost .120"
We trammed the boring bar holder same thing, checked the tool slot its 0.000"
HAd the tech come back, and he re pulled the turret, rechecked all the tapered pins, and put all the pins back in, and the boring bar pocket is perfect 0.000, but the tool slot is out .025", he pulled the pins, and aligned the slot, back to .120 out on the CD. put pins back and its 0.000
Now, has anyone ever had a turret where the 2 dont agree? the tech, dealer service manager, and Machine Tool Dynamics people all agree it shouldnt be possible, unless the MTB didnt shim the turret correctly from the factory.
As a note, the headstock is aligned with z within .001" over 16" on a 4" daimeter bar, and the tailstock and headstock are also within .001 on the same bar.