Phil Johnson wrote:
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"
Any help, what am I doing wrong?

You say the blanks are faceplate-mounted, and that the wobble is
progressive. it sounds as though the mounting is getting looser as you
turn the blank. If the blank is screwed to the faceplate, double check
the screws. If you are using a sacrificial blank between the faceplate
and the turning blank, see if it is getting loose.
Good luck,
Dave in Fairfax
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