Adjust the (4) center leveling screws to lift the casting three inches (3", 76.2mm) off of the ground.

Turn both middle screws up off the middle pads.

Attach tool T-2192 to the spindle with the precision level parallel to the X Axis. Visually check that the level aligns with the T-slots.

First level the machine side to side.

Lift or lower one side with even adjustments of the two screws to center the bubble in the tool.

Move the level to lie parallel to the Y Axis. Visually align the tool with the t-slots.

Adjust either the front or back screws evenly to level the machine front to back and center the bubble in the level tool.

Zero return the B and C Axes. Indicate the table face along the X Axis over a distance of 20" (500mm).

If the reading is not zero, jog the B Axis (in 0.0001" increments) until the indicator reads zero over 20". Note the B Axis position for later.

Rotate the C Axis to C90. Check the parallelism of the table surface to the Y Axis in the up and down direction.

Zero your indicator at the back, on the table face. Sweep forward with the Y Axis over 20" (500 mm). Record the indicator reading, noting both the magnitude and the direction.

Use the middle leveling screws to raise the middle of the machine and adjust the B Axis.

Turn the middle leveling screws down until they just contact the leveling pads and then turn them down an additional 10 degrees.

The middle of the machine will always need to be raised initially. Adjust the middle screws evenly on each side. Always make adjustments in small increments and set both middle screws evenly on either side with each adjustment.

Continue to adjust the middle screws up or down until the indicator reads zero over the 20" (500 mm) sweep.

Add 90 degrees to the value you adjusted B Axis to earlier. Command the B Axis to this position (for example B90.003 degrees).

Zero the indicator on the rear table face and jog the Y Axis from back to front over 20" (500 mm). Record the indicator reading, noting both the magnitude and the direction.

This measurement shows the position of the table relative to the Y Axis in the side to side direction.

If the trunnion leans to the right, lift with the right front leveling screw and lower with the left front leveling screw in small, equal, increments.

If the trunnion leans to the left, lift with the left front leveling screw, lower with the right front.

Sweep the table again to make sure that it is aligned to read zero over the 20" (500mm) sweep.

Zero return the C Axis and indicate one of the t-slot walls over 20" (500 mm), with the error value not to exceed (NTE) 0.001"/20" (0.025 mm/ 500 mm).

Zero return the B Axis, and indicate the table surface. Sweep the table over 20 inches (500 mm), with the value NTE 0.001"/20" (0.025 mm/500 mm).

Note:

• If either reading is higher than one thousandth (0.001", 0.025mm), repeat the machine leveling process. Small errors in the leveling sequence can negatively influence the B and C home positions.
• If you verify the level is correct but the B or C home positions are still not within specification, you can slightly adjust the left or right front screw to change the B and C home positions a small amount. Check both home positions after you make any adjustments.

Move the spindle head to the middle of the Z Axis travel. Position the test indicator to measure a 10" (250mm) diameter circle at the center of the table.

Zero the test indicator at the operator side of the table.

Take a measurement every 90 degrees of rotation.

Total indicated runout (TIR) for all four positions is not to exceed (NTE) 0.0005" (0.012 mm).

Note: The spindle sweep values are also affected by the precision of the leveling sequence; if the values exceed specification, check the machine level again.