Dewalt DW715 Instruction Manual - Page 12

English CUTTING TRIM MOLDING AND OTHER FRAMES Sketch B in Figure 12 shows a joint made by setting the miter arm at 45 degrees to miter the two boards to form a 90 degree corner. To make this type of joint, set the bevel adjustment to zero and the miter arm to 45 degrees. Once again, position the wood with the broad flat side on the table and the narrow edge against the fence. The two sketches in Figure 12 are for four side objects only. As the number of sides changes, so do the miter and bevel angles. The chart below gives the proper angles for a variety of shapes. (The chart assumes that all sides are of equal length.) For a shape that is not shown in the chart, use the following formula. 180 degrees divided by the number of sides equals the miter (if the material is cut vertically) or bevel angle (if the material is cut laying flat). NO. SIDES 4 5 6 7 8 9 10 - EXAMPLES ANGLE MITER OR BEVEL 45° 36° 30° 25.7° 22.5° 20° 18° CUTTING COMPOUND MITERS A compound miter is a cut made using a miter angle and a bevel angle at the same time. This is the type of cut used to make frames or boxes with slanting sides like the one shown in Figure 14. NOTE: If the cutting angle varies from cut to cut, check that the bevel clamp knob and the miter lock knob are securely tightened. These knobs must be tightened after making any changes in bevel or miter. The chart shown on page 15 will assist you in selecting the proper bevel and miter settings for common compound miter cuts. To use the chart, select the desired angle "A" (Figure 14) of your project and locate that angle on the appropriate arc in the chart. From that point follow the chart straight down to find the correct bevel angle and straight across to find the correct miter angle. Set your saw to the prescribed angles and make a few trial cuts. Practice fitting the cut pieces together until you develop a feel for this procedure and feel comfortable with it. Example: To make a four-sided box with 26° exterior angles (Angle A, Figure 14), use the upper right arc. Find 26° on the arc scale. Follow the horizontal intersecting line to either side to get miter angle setting on saw (42°). Likewise, follow the vertical intersecting line to the top or bottom to get the bevel angle setting on the saw (18°). Always try cuts on a few scrap pieces of wood to verify settings on saw. FIG. 12 A B FIG. 13 FIG. 14 ANGLE "A" FIG. V1 KERF PLATE MITER ANGLE CENTER MARK ON VERNIER SCALE ALIGNS WITH DESIRED WHOLE ANGLE ON MITER SCALE (24° RIGHT MITER) FIG. V2 1/4° VERNIER MARK ALIGNS WITH CLOSEST WHOLE DEGREE MARK ON MITER SCALE (24-1/4° RIGHT MITER) 10 VERNIER SCALE Your saw is equipped with a vernier scale for added precision. The vernier scale allows you to accurately set miter angles to the nearest 1/4 degree. To use the vernier scale follow the steps listed below. (As an example, let's assume that the angle you want to miter is 24-1/4 degree right). 1. Turn off miter saw. 2. Set the miter angle to the nearest whole degree desired by aligning the center mark in the vernier scale, shown in Figure V1, with the whole degree number etched in the miter scale. Examine Figure V2 closely; the setting shown is 24 degrees right miter. 3. To set the additional 1/4 degree, squeeze the miter arm lock and carefully move the arm to the RIGHT until the 1/4 degree vernier mark aligns with the CLOSEST degree mark on the miter scale. In our example, the closest degree mark on the miter scale happens to be 25 degrees. Figure V2 shows a setting of 24-1/4 degrees right miter. For settings that require partial degrees (1/4, 1/2, 3/4 degrees) align the desired vernier mark with the CLOSEST degree mark on the miter scale, as described below (The plastic vernier plate is inscribed with marks for 1/4, 1/2, 3/4 and 1 degrees. Only the 1/2 degree and the 1 degree are numerically labeled.) WHEN MITERING TO THE RIGHT To increase the miter angle when mitering to the right, move the arm to align the appropriate vernier mark with the closest mark on the miter scale to the right. To decrease the miter angle when mitering to the right, move the arm to align the appropriate vernier mark with the closest mark on the miter scale to the left. WHEN MITERING TO THE LEFT To increase the miter angle when mitering to the left, move the arm to align the appropriate vernier mark with the closest mark on the miter scale to the left. To decrease the miter angle when mitering to the left, move the arm to align the appropriate vernier mark with the closest mark on the miter scale to the right. CUTTING BASE MOLDING ALWAYS MAKE A DRY RUN WITHOUT POWER BEFORE MAKING ANY CUTS. Straight 90 degree cuts: Position the wood against the fence and hold it in place as shown in Figure 15. Turn on the saw, allow the blade to reach full speed and lower the arm smoothly through the cut. CUTTING BASE MOLDING UP TO 1" (25.4mm) THICK BY UP TO 3-5/8" (91mm) WIDE VERTICALLY AGAINST THE FENCE • Position molding as shown in Figure 15 • All cuts made with the back of the molding against the fence and bottom of the molding against the base