Southbend ROTARY TABLE SB - Manual (Page 11)

-9-
SB1363-64/SB1367-68 Mfg. Since 10/09 P R E P A R AT i O n
Horizontal installation
Alignment
Two methods are described below
for aligning the mill spindle and
rotary table centerlines when the
rotary table is mounted horizontally.
To use a test indicator to align the
rotary table:
1. DISCONNECT MILL FROM
POWER!
2. Mount the test indicator to the
mill spindle offset from the
spindle centerline by the radius
of the rotary table spindle bore,
then position the tip on the
inside vertical surface of the
rotary table spindle bore (see
Figure 5 for an example).
Figure 5. Example of using a test
indicator to align a rotary table.
3. Turn the mill spindle by hand so
that the test indicator is aligned
to the X-axis of the mill table.
note: For best results, turn the mill
spindle in only one direction.
4. Slowly move the mill table until
the test indicator reads zero
deviation.
5. Rotate the mill spindle and
test indicator 90°, then repeat
Step 4.
6. Repeat Step 5 until the test
indicator reads zero deviation in
all four directions.
Tip: Use a mirror to read the
indicator when it is facing away
from you.
To use an edge finder to align the
rotary table:
1. Mount an edge finder into the
mill spindle, then position it
roughly in the center of the
rotary table spindle bore and
below the rotary table surface.
2. Set the mill spindle speed to
800–1000 RPM, then turn the
mill ON.
3. Slowly move the mill table along
the X-axis in one direction until
the edge finder meets the edge
of the rotary table spindle bore,
then note the position of the
table on the handwheel dial.
note: When recording the mill table
position, take into account the
backlash that is usually present
in the leadscrew.
4. Slowly move the mill table in
the opposite direction until
you again find the edge of the
spindle bore, then note the table
position on the handwheel dial.
5. Calculate the difference of
the mill table positions from
Steps 3–4.
6. Move the mill table 1 ⁄
2
the
amount calculated in Step 5
along the X-axis. Be sure to take
into account any backlash.