Assessments - 3, GPA: 4.3
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9. Correct belt tension is when there is approximately 1/4" deflection in the center span of the pulleys, using light finger pressure. After tension is applied, tighten screw (D) Fig. 51. C B A Fig. 50 B A Fig. 50A Fig. 51 D E C F E Fig. 52 20 MACHINE USE COMMON SAWING OPERATIONS Common sawing operations include ripping and crosscutting plus a few other standard operations of a fundamental nature. As with all power machines, there is a certain amount of hazard involved with the operation and use of the machine. Using the machine with the respect and caution demanded as far as safety precautions are concerned, will considerably lessen the possibility of personal injury. However, if normal safety precautions are overlooked or completely ignored, personal injury to the operator can result. The following information describes the safe and proper method for performing the most common sawing operations. THE USE OF ATTACHMENTS AND ACCESSORIES NOT RECOMMENDED BY DELTA MAY RESULT CROSS-CUTTING Cross-cutting requires the use of the miter gage to position and guide the work. Place the work against the miter gage and advance both the gage and work toward the saw blade, as shown in Fig. 53. The miter gage may be used in either table slot. When bevel cutting (blade tilted), use the table groove that does not cause interference of your hand or miter gage with the saw blade guard. Start the cut slowly and hold the work firmly against the miter gage and the table. ONE OF THE RULES IN RUNNING A SAW IS THAT YOU NEVER HANG ONTO OR TOUCH THE PART OF THE WORKPIECE THAT WILL BE CUT OFF. Hold the supported piece, not the free piece that is cut off. The feed in crosscutting continues until the work is cut in two, and the miter gage and work are pulled back to the starting point. Before pulling the work back, it is good practice to give the work a little sideways shift to move the work slightly away from the saw blade. Never pick up any short length of free work from the table while the saw is running. While blade is running, never touch a cut-off piece unless it is at least a foot long. For added safety and convenience the miter gage can be fitted with an auxiliary wood-facing (C), as shown in Fig. 54, that should be at least 1 inch higher than the maximum depth of cut, and should extend out 12 inches or more to one side or the other depending on which miter gage slot is being used. This auxiliary wood-facing (C) can be fastened to the front of the miter gage by using two wood screws (A) through the holes provided in the miter gage body and into the wood-facing. When using the block (B) Fig. 55, as a cutoff gage, it is very important that the rear end of the block be positioned so the work piece is clear of the block before it enters the blade. NEVER USE THE FENCE AS A CUT-OFF GAGE WHEN CROSS-CUTTING. When cross-cutting a number of pieces to the same length, a BLOCK OF WOOD (B), can be clamped to the fence and used as a cut-off gage as shown in Fig. 55. It is important that this block of wood always be positioned in front of the saw blade as shown. Once the cut-off length is determined, secure the fence and use the miter gage to feed the work into the cut. This block of wood allows the cut-off piece to move freely along the table surface without binding between the fence and the saw blade, thereby lessening the possibility of kickback and injury to the operator. 21 IN THE RISK OF INJURY TO THE USER OR OTHERS. Fig. 53 C A Fig. 54 B Fig. 55 USING UNIFENCE AS CUT-OFF GAGE WHEN USING YOUR UNIFENCE AS A CUT-OFF GAGE, MAKE SURE IT IS PROPERLY SET UP AS DESCRIBED HERE. The Unifence can be used as a cut-off gage when cross cutting a number of pieces to the same length. When using the unifence as a cut-off gage, it is very important that the rear end of the fence be positioned so the work piece is clear of the fence before it enters the blade. When using the fence as a cut-off gage, position the fence (A) to the front as shown in Fig. 56, or purchase a 12" long fence (B), as shown in Fig. 57. A typical operation using the 12" long fence (B) as a cut-off gage is shown in Fig. 58. B Fig. 57 RIPPING Ripping is cutting lengthwise through a board, (Fig. 59). NOTE: Be sure the material to be cut is seasoned, dry and flat. The rip fence (A) is used to position and guide the work. One edge of the work rides against the rip fence while the flat side of the board rests on the table. Since the work is pushed along the fence, it must have a straight edge and make solid contact with the table. THE SAW BLADE GUARD MUST BE USED. ON DELTA SAWS, THE GUARD HAS ANTIKICKBACK FINGERS TO PREVENT KICKBACK AND A SPLITTER TO PREVENT THE WOOD KERF FROM CLOSING AND BINDING THE BLADE. BE SURE TO REPLACE OR SHARPEN THE ANTI-KICKBACK DEVICES WHEN THE POINTS BECOME DULL. A RIP FENCE SHOULD ALWAYS BE USED FOR RIPPING OPERATIONS. NEVER PERFORM A RIPPING OPERATION FREE-HAND. 1. Start the motor and advance the work holding it down and against the fence. Never stand in the li...