Using a model mill instructions

FIGURE 2-Checking for built in error in the table travel along the Y-axis
Squaring up the ram
(See Figure 3.) The next decision to make is where the spindle is to be located. With all
the adjustments that can be made with the 8-direction mill you'll probably start with the
spindle located near the middle of the X/Y table movements. Something that isn't too
obvious should be considered now. If the ram (the two-bar slide that allows you to move
the head in or out and left or right) isn't square with the X-axis, the rotating column
calibrations will have an error. To square up the ram, mount a dial indicator to the
worktable and move the X-axis back and forth while reading the left and right surfaces of
the column bed near the bottom. This only has to be done if you will be rotating the
column and want to be able to rely on the angle graduation readings. Once set, lock the
ram in place with the flange nut.