- Joined
- May 16, 2016
- Messages
- 1,687
Good luck with the new machine.
As for the other one, obviously when the headstock is pointing towards the front or the back it will turn with a taper along the length, it will also result in a concave or convex face. What happens when you get the parallel bit right and you still have a convex or concave face. It would appear that you have corrected the parallel part by the wrong method.
You first need to confirm that the centerline of the headstock is parallel to the bed in the horizontal plane, that is, it is neither pointing up nor down. If it's pointing up or down that will cause it to turn tapered even when lined up correctly. So you need to correct the horizontal alignment first, by shimming under the headstock, so that the center line of the H/S is the same height above the bed along its length, or at least at both ends.
Once that is done then you can continue as before to correct the parallel turning in the normal way. This should result in the lathe turning parallel and square across teh face. If it does not then one would have to assume that the cross slide is not square to the bed. I don't know how you can correct that.
As for the other one, obviously when the headstock is pointing towards the front or the back it will turn with a taper along the length, it will also result in a concave or convex face. What happens when you get the parallel bit right and you still have a convex or concave face. It would appear that you have corrected the parallel part by the wrong method.
You first need to confirm that the centerline of the headstock is parallel to the bed in the horizontal plane, that is, it is neither pointing up nor down. If it's pointing up or down that will cause it to turn tapered even when lined up correctly. So you need to correct the horizontal alignment first, by shimming under the headstock, so that the center line of the H/S is the same height above the bed along its length, or at least at both ends.
Once that is done then you can continue as before to correct the parallel turning in the normal way. This should result in the lathe turning parallel and square across teh face. If it does not then one would have to assume that the cross slide is not square to the bed. I don't know how you can correct that.