Tramming the Taig Micro Mill
Tramming the mill bed is similar to tramming the tailstock. Mount a dial test gauge in the mill spindle. Used a 3/16" diameter adapter that attaches to the end of the dial test gauge. It was then mounted in a collet. Iterate sides by rotating 180° & adjusting (changing by half the difference) the angle of the mill's upright support until there are no left-to-right differences. The upright support is held in place under a nut with a washer.
When loosened for adjustments, do not allow the column to fall to the side or damage may occur.
Then tram the
solid jaw of the mill vise using the same basic method. A rubber wedge
keeps the spindle from rotating.
Run the the jaw face (x-axis) left & right, making half the distance adjustments
of the vise, until there are no differences.
This vise is ± 0.0002" & the dial test gauge scale is in 0.001"
gradations.
Old aluminum vise brackets did not mar the table but
deflected a little.
I have now replaced the vise clamps with steel L-bracket
milled to the correct dimensions.
It acts like a toe clamp so there is a small downward angle towards the vise's
ledge.
The toe edges have been chamfered. The foot has been diamond ground smooth &
given radius corners so as to not gouge the Taig's aluminum table.
The brackets hold the
vise tightly, do not bend & no table marring. The brass blocks increase setup
rigidity.