Grizzly G9298 Adjusting Handwheel Scales, Vernier Scale, Tools Needed, To set the table at

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	Qty
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).

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.

Handwheel

Scale

Table

Scale

At Zero

Vernier

Scale

Figure 8. Table scale at zero degrees.

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G9298/G9299/G9300 Rotary Table