Face mill finish

[Edward]

Well, in theory you are correct.

Tomorrow I will double check the squareness of the column to the table again. It must be pretty close because when I used the facemill, the stepover raised level was gone completely
whereas before I did the column alignment there was a small raised level on the piece, as can be seen in the very first post.

Earlier I read 0.4mm out of square on a 30cm swipe. I will fine tune this and see what happens.

Edward

EDIT video included:

Forgive the crappy video, but it shows how I measured it. First the top of the rod, hardly any runout, less than 0.01mm. on either side of zero.

Then again at the low end of the rod, notice the equal deflection either side of zero, around plus/minus 0.05mm