ES0755 rev A 1/11
15
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1. Check that the mating flange screws are still free to turn so the following steps do not affect the
level of the table base primary datum.
2. Allow only the four leveling screws on the corners on the column base are to be in contact with
the leveling pads at this time.
3. With the column at approximately center of travel, lay one granite parallel across the linear guides
as close to the table as possible and another granite parallel across the linear guides as near the
rear of the machine as possible.
4. Place a level on each parallel and adjust the level of the column from side to side.
5. Check the freedom of the mating flange screws to be certain there is no binding. Raise or lower
the column base as necessary to free screws.
6. On the guide nearest the control, place one level on the linear guide in front of the column and
one level on the linear guide to the rear of the column. Adjust the level of the machine in the
direction of Y-axis travel. Move the levels to the opposite linear guide and complete the process.
Repeat steps 3-6 until the column base is level. Be certain throughout the process that the mating flange
screws are free to rotate. A binding of the screws will mean that the column base will have to be raised or
lowered as necessary and the leveling process of the column base will need to be repeated.
7. When the column base is level to earth in both directions, the six center leveling screws should
be lowered to touch the leveling pads.
8. Remove the granite parallels from the column base.
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1. Handle jog the column to the rear.
2. Place a single level inside the column, parallel with the X-axis of the machine. It is very unlikely
that this surface will read zero, do not expect it to. Note the reading that is present.
3. While monitoring the level, move the column all the way forward and check if there is a change in
the level reading. If there is no change of reading, then the column base has no twist. If there is a
twist in the base, this must be corrected.
4. Place an indicator in the special tool and touch off on the table surface. Sweep the table in the Y-
axis (VS) / Z-Axis (HS) direction only, to determine, and correct column base flatness in the Y/Z-
axis direction. This is a very sensitive measurement method and corrections to this level should
be made in conservative steps.
NOTE
: Any corrections that are made in this check of the column base
level require that a repeat of the basic leveling procedure be done
and a recheck of the level be done.
All criteria must be met.
