Ok guys, thanks for the response. Like Ron, at first I was thinking
headstock or spindle alignment. But the more I think about it, what
would cause that? I loosened the mounting bolts today (they weren't
real tight, just snug) and will wait a few days to try shimming.
I'll do as Dennis suggested and try .015 under the near foot at the
tailstock end. I'll keep you posted as to my progress.
Dave, as to your calipers, when they say accurate to +/- .001 at 6
inches, don't let that lead you to belive they are 6 times more
accurate at 1". Think of it as a linear thing. +/- .001 anywhere
between 0 and 6".
Jim
--- In daltonlathes@..., "Jim Bonner" <bogyjim@...> wrote:
Hi all,
I'm wondering if someone could give me some advice on getting my
lathe to cut straight. The lathe is a Dalton B6. When I cut a test
bar,(without a center in the tailstock) I get about .005 taper in 6
inches. The smaller diameter is at the headstock end. I would
think
that if it was a matter of normal bed wear, the smaller diameter
would be at the tailstock end. I have checked for bed wear by
mounting a travel indicator on the carriage and indicating off the
tailstock flat way. It doesn't indicate any wear that way.
I'm thinking that the spindle bearings aren't aligned with the
bed.
As I recall there is about .004 shim under the large spindle
bearing
halves to take up for wear in the bearing.
Any suggestions?
thanks, Jim Bonner
