35 - Revolving Tool Station, страница 11

Level

Adjusting the

B~ To get accurate results, the plumb vial needs to be perpendicular to the bottom edge of the level, see photo.

Since the hole for the vial was drilled

edge, it should be close. But you may need to "true up" the bottom just a bit.

To find out, start with a known level surface. (For a tip on establishing this surface, refer to page 27.) Then check the plumb vial, see Step 1.

If it's not accurate, reposition the level until the air bubble in the vial is dead on, see Step 2. This will create a slight gap between the try square and one 'end of the level.

To true up the level, simply sand the opposite end, see Step 3. Just be sure to check the vial again every two or three strokes.

BUBBLE OFF CENTER

LEVEL SURFACE

NOTE: GAP

EXAGGERATED FOR CLARITY

BUBBLE CENTERED

17o check the plumb vial, place the level against a try square that's on a known level surface.

2Now move one end of the level away from the square until the air bubble is dead on.

APPLY LIGHT DOWNWARD PRESSURE WHILE SANDING BACK AND FORTH

SILICON-CARBIDE SANDPAPER TO FLAT SURFACE

3 If you need to true up the bottom of the level, attach a piece of sandpaper to a flat surface. Then with pressure on the end that needs to be shaved down, take two or three light strokes.

The second part of the adjustment process is to calibrate the level vial, see photo.

Here again, you'll need to use a known level surface to make a precise adjustment, see Step 4. After centering the air bubble in

the vial, it's a good idea to double check the adjustment. To do this, turn the level end for end — the reading should be the same.

Once you're satisfied with the adjustment, simply attach the cover plate with screws, see Step 5. ik

IUY Uh VIAL HOLDER MUST BE BELOW TOP OF RECESS

LEVEL SURFACE

4 With the level resting on a known level surface, adjust one end of the vial holder up or down until the air bubble is centered on the indicator lines of the vial.

5After double checking the adjustment of the vial, the brass cover plate is simply screwed in place.

TURN SCREW TO ADJUST VIAL UP OR DOWN

No. 35

ShopNotes

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