A remote diagnosis is difficult, but if your spindle is within tolerances
but you are eccentric, then the problem may be the mating surfaces between
your spindle and the faceplate. Mounting the faceplate "true" on the spindle
does not come from the threads but from the mating surface on the spindle
and the mating surface on the faceplate.

It is easy to check the mating surface on the spindle. If ok, mount the
faceplate and check the faceplate for runout. You may have warped or bent
your faceplate. It is easier than you think to do this with screws,
especially if you use a ratchet for leverage.

"Phil Johnson" wrote in message
...
Having returned to turning for the first time since school, (many years
ago)
and have managed to full our house with many small bowls, hollow forms,
couple of lamps, pens, and some thin platters etc. using up all my hoarded
timber.
Four months into this renaissance, I have recently started to spot my work
pieces "wobbling" whilst spinning, made very apparent when attempting to
cut
a 4 x 1mm groove and inset a contrasting band near the rim of a
part-turned
(outside only) 8" sycamore bowl blank (faceplate mounted), and was even
more
apparent when reversed and "chucked"
The lathe, tools and my current experience are all four months old, and
the
"wobble" seems progressive. The lathe bearings, and the chuck have just
been
checked by the supplier (Axminster) and found to be well within tolerance.
Thus they have decided, the problem is me!
Any help, what am I doing wrong?