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E. Table Scale: displays the amount of table
rotation in whole degrees.
f.
Spindle: holds a center to support a
workpiece for dividing work. Also, used in
rotary table alignment with the mill spindle.
G. Backlash Adjustment Lock: secures the
backlash adjustment ring in place.
H. Vernier Scale: displays the amount of table
rotation with a resolution of 10" (10 arc sec-
onds.
Adjusting Handwheel
Scales
the handwheel scales can be easily adjusted to
a good viewing position when the rotary table is
installed horizontally or vertically.
Tools Needed
standard screwdriver ........................................ 1
To adjust the handwheel scales:
1.
rotate the rotary table until the zero on the
table scale is aligned with the index mark on
the side of the table (see figure 8).
handwheel
scale
figure 8. table scale at zero degrees.
-12-
Qty
table
scale
At zero
Vernier
scale
2.
loosen the screw on the back of the vernier
scale and rotate so that the zero mark is in
a good viewing position, then re-tighten the
screw.
3.
rotate the handwheel scale so that its zero
mark aligns with the one on the vernier
scale.
Vernier Scale
use the vernier scale to rotate the table by 10" (10
arc seconds) at a time.
in the example below, you will be setting the rota-
ry table to 16° 42' 20". this exercise assumes the
table position is at zero, and both the handwheel
and vernier scales are aligned at zero.
To set the table at 16° 42' 20":
1.
With the table at 0°, rotate the handwheel
clockwise four full turns, which will rotate the
table 16°.
— if you go past zero on the fourth turn, return
the table to 0°, then start again.
Note: When changing directions with the
handwheel, take into account any backlash.
g9298/g9299/g9300 rotary table
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