The actual reference surfaces are the face of the spindle and the
outer dia. of the spindle nose; the outer dia. of the spindle is not
a reference. IIRC, the mini-lathe.com and/or littlemachineshop.com
sites have alignment measuring/adjusting procedures.
It's very easy to get measurement errors in the under .001" range -
everything flexes & sticks enough to make technique critical.
(Another area where you have to screw it up to learn how to do it
<g>) Assuming good meaurements, bearing preload may be the cause.
On the left end of the spindle, there are 2 locknuts; loosen the
outer one, tighten the inner one until the spindle doesn't deflect
under moderate longitudinal pressure in either direction, yet still
turns freely. After tightening the outer locknut against the inner
one (you do have 2 hook spanners, don't you?), repeat the
measurements & adjustments until it comes out right after the outer
nut is tightened (it pushes the inner nut away from the adjustment
point.) [Bicycle shops are a source for thin hook spanners.]
Alternately, since Micro-Mark charges a princely sum for their
merchandise, call customer service and make it their problem.
Roy
--- In 7x12minilathe@..., "roycetool" <royce_martin@e...>
wrote:
Hi to all!
New here [and to machining] and having a great ime learning a new
craft.
I got a 7x14 from MicroMark. Lots of small problems, but my big
one
is spindle runout. I am getting just under .001" of runout on the
face of the spindle AND on the outer diameter! Of course, this
means
that turning anything true is almost impossible.
Anyone have any knowledge/suggestionson this one?
Thanks.
