We have an old ST40 2 axis lathe. We just bought it cheap for roughing but the machine turns out to be in pretty good condition. There's jus one problem.
We can't get the centre height for the turret set right.
The Turret has 5 holes in the turret face for mounting U-Drills, boring bars etc. Then tooling blocks (Turning and boring) that mount on the periphery of the turret.
The problem is if we set the height for the boring bar holders in the face of the turret then the turning tools are not on centre.
I have no idea how this can be. I am guessing maybe the turret itself is too low. I can see there are shims between the carriage and the turret itself. How it could end up with the wrong shims beats me. there does not appear to be any appreciable wear on the slideways and the machine cuts reasonably parallel. The error between the face holders and the turing tools is almost 2.5mm!
I was beginning to wonder if there were two curvik couplings, one for the inner set of holes and one for the outer.
If anyone has any ideas on this I'd be grateful to hear.
Cheers Andy
We can't get the centre height for the turret set right.
The Turret has 5 holes in the turret face for mounting U-Drills, boring bars etc. Then tooling blocks (Turning and boring) that mount on the periphery of the turret.
The problem is if we set the height for the boring bar holders in the face of the turret then the turning tools are not on centre.
I have no idea how this can be. I am guessing maybe the turret itself is too low. I can see there are shims between the carriage and the turret itself. How it could end up with the wrong shims beats me. there does not appear to be any appreciable wear on the slideways and the machine cuts reasonably parallel. The error between the face holders and the turing tools is almost 2.5mm!
I was beginning to wonder if there were two curvik couplings, one for the inner set of holes and one for the outer.
If anyone has any ideas on this I'd be grateful to hear.
Cheers Andy