takisawa turret bang

[moshingmadmark]

can anyone help ?!
we have a takisawa tc-01 lathe which has had a bang .the turret is a tool station and a bit out .do i have to slacken off the bolts on the front of the turret and pull the turret into position or is that too easy a solution ? this is my first post

[Jerle]

Normally for alignment processes you would do that exactly. The full procedure would require you to turn a piece of material, measure it, then reset the turret, then reset your work coords, cut again, and so on until you have proven the turret locates correctly for all tools.

[underthetire]

Why would you turn a bar for a turret alignment? All you need to do is set the parallelism of the turret with an indicator. Then use a coax indicator in the spindle, and sweep in a boring bar holder. There can be a lot more to turret alignments than meets the eye, some machines get the coupling bolted in from the back side of the turret disk, others the front, but ALL of them may need the internal coupling adjusted at some point. Once your done, then you check headstock alignment by turning a bar.

[Jerle]

First off you would need to turn to center to get close to your X-Axis zero, then use a center drill on a station that is close to aligned to set true X-Zero.

[Jerle]

I have ball barred many machines in the past, and have never been wrong. I have over 17 years experience as a cnc machinist aerospace, and I learned from some of the best.

[underthetire]

Or you could just indicate the turning tool slot, it's supposed to be parallel with the X axis slide. Still need to double check with a coax indicator for center line.

[underthetire]

I've been a factory tech for the last 20 years, and i'm wrong at least once a week. He who thinks he knows is never right.

[Jerle]

FYI underthetire, most coaxial indicators only work to specs of +/-.001 at the best. True alignment of headstock and turret require hours of work and cutting to obtain the optimum results for the particular machine. Providing that this person may go ISO or close to, then .001 is not good enough. Thanks for you input though.

[underthetire]

What does ISO have to do with a turret alignment? All ISO does is prove your doing what you say your doing. .0005 is close enough for 99% of turret alignments. It has not much to do with machine accuracy, only tool geometry. I have done at least 300 turret alignments in my day, from turrets ripped off the slides to minor bumps. I have seen others do them as well as other factory guys from high end builders. They all use a .0001 indicator and a coax.