On Jan 29, 11:33*am, Ignoramus7752
wrote:
On 2010-01-29, Wild_Bill wrote:

Shouldn't the testing also include running the DTI along the top or bottom
of the test bar?

Good idea

And how about running the DTI along a precision tailstock surface, not
associated with the carriage travel?

You mean, keep carriage in place and move the tailstock?

i

Another thing that is extremely important, is to eliminate the
possibility of "bed twist". While it can be fun with a partner, it's
no good when measuring a lathe for accuracy.

You are going to need an accurate Machinist's level.

Level the bed parallel to the ways (axially), then at each end
perpendicular to the ways. You want to make sure that the lathe bed
is level.