hello, i need to prepare a lathe for a ~7D hole
i need that all tools working here to be in spindle axis.
the lathe had a crash some time ago, and after that it was realigned by the dealer, but i saw while working that realingment was not so good.
another service team come back and verified the alignment, and find diferences. They wanted to repeat the alignmet method, so to remove the errors.
alignment method :
- turret align among Z axis
- turret align among X axis
- turret align with spindle center, as in 00.jpg
I refused the realignment, because between these 2 services the machine didn't move/work, and diference was ~0.2 at [ turret align with spindle center, as in 00.jpg ], so tool axis was radial
So i worked a while with the machine missaligned, because parts were simple, and alignment was not necesary.
Now i need to align the machine for this 7D hole, were tools are ~200mm long.
Hole geometry : 26.5 [ 0 .. +0.14 ] x 180
Turret is as in 01 and 02 images. Excentric stift/bolt from the turret poligon are a bit messed up, so i need to align them first.
Excentric bolt is in 01 image, marked with red.
So, please, how would you verify this :
- drils to be in spindle center
- live M axis to be perpendicular and intersecting spindle axis
In my opinion :
- for [drils to be in spindle center] : all excentric bolts/stifts must be indexing at the same position, and this position must be at aligned relative to spindle
- for [live M axis to be perpendicular and intersecting spindle axis] : the 60mm hole in turett poligon must have it's center perp. and intersecting spindle axis
This alignments should be done without holders on the turret, because turrets have their own errors. A new turret has a geometrical repetability at indexing under 0.02mm
A holder has it's own manufacturing errors, under 0.015 .. 0.02 mm; so aligning a turret with a holder on it can be done only for one post from 12 available. Once you move the holder to another post, you can be missalinged.
So, i think i must not ask how would you align a turret, but how would you verify this :
- drils to be in spindle center
- live M axis to be perpendicular and intersecting spindle axis
kindly