Probably worn bed near the Chuck
Turn up a test bar and check.
Any adjustments on the TS
You could place some shims under the T/S to lift it.
Between the base and the upper part, so at the sliding joint used to adjust offset.
Agree, and the wear in the bed is likely more than the wear in the tailstock. And unless you're machining small diameter long stuff it won't make that much difference anyway. And if you are machining small diameter long stuff you should do a test cut to correct any errors with the tailstock. Ok, this is a fix that won't be a guaranteed fix due to non linear errors, but it could help.Its a huge bodge. The tailstock base is likely worn, as will be the bed. Where do you take your measurements from to get it on centre? As soon as you move it the error will change
Its a huge bodge. The tailstock base is likely worn, as will be the bed. Where do you take your measurements from to get it on centre? As soon as you move it the error will change
Is that a plan?
I think I have worked out a way to measure it. I have a vernier height gauge. I could use some parallels on the ways and check it at various points along the bed.
Is that a plan?
If you want to know where the tailstock bore is in relation to the spindle,
stick a dial gauge in the chuck and rotate it in the tailstock bore.