O P E R A T I O N | Mfg. Since 10/09 |
Aligning Handwheel & Vernier Scales
The handwheel scales can be easily aligned with each other and adjusted for easy viewing.
Tools Needed | Qty |
Hex Wrench 5mm | . . 1 |
To align and adjust the handwheel and vernier scales:
1.Loosen the two set screws on the vernier scale (see Figure 9), rotate the vernier scale so that it is in a convenient viewing position, the
Handwheel
Scale
Set Screw
Vernier Scale Set Screw
(1 of 2)
Figure 9. Locations of the handwheel and
vernier scale set screws
2.Use the handwheel to rotate the table until the 0° on the table rotation scale aligns with the center mark on the pointer (see Figure 10).
Pointer
Rotation
Scale
Figure 10. Location of the rotation scale
pointer.
3.Loosen the set screw on the handwheel (see Figure 9), rotate the handwheel scale until the 0° mark aligns with the 0° mark on the vernier scale, then
Using Vernier Scale
The vernier scale is used to measure table rotation by 10" (ten arc seconds) at a time.
Use your rotary table to follow along with the example below to better understand how to use the vernier scale.
Note: This example assumes the table rotation position is at 0°, and the handwheel and vernier scales are aligned at 0°.
To set the table at 16° 32' 20":
1.With the table at 0°, rotate the handwheel clockwise four full turns, which will rotate the table 16°.
—If you go past the handwheel scale 0° mark on the fourth turn, rotate the table counterclockwise 1⁄2 turn, then start again.
Note: When changing direction with the handwheel, take into account any backlash.
