Ryobi P1819 Operation Manual 2 - Page 7

OPERATION WARNING: Unsecured work could be thrown towards the operator, causing injury. WARNING: Keep hands away from blades. Do not reach underneath work or around or over the blade while blade is moving. Do not attempt to remove cut material when blade is moving. CUTTING See Figure 5, page 9.  Mark the line of cut clearly.  Hold the tool firmly in front of and clearly away from you. Make sure blade is clear of any foreign material.  Depress the switch trigger to start the cutting action. Allow the blade to come to full speed, then move the blade into the work.  To cut, keep the teeth of the blade in the workpiece surface and move the back of the tool slowly in a constant sideways motion. NOTE: If the line and writing on the blade looks blurry when in use, you are using the correct amount of pressure. If they become clear, you are using too much force. NOTICE: Do not force. Use only enough pressure to keep the saw cutting. Let the blade and saw do the work. Use of excessive pressure will cause strong vibrations to the tool, which may result in broken blades and cause premature wear to the tool's motor. SANDPAPER SELECTION Selecting the correct size grit and type sandpaper is an extremely important step in achieving a high quality sanded finish. Aluminum oxide, silicon carbide, and other synthetic abrasives are best for power sanding. Natural abrasives, such as flint and garnet are too soft for economical use in power sanding. In general, coarse grit will remove the most material and finer grit will produce the best finish in all sanding operations. The condition of the surface to be sanded will determine which grit will do the job. If the surface is rough, start with a coarse grit and sand until the surface is uniform. Medium grit may then be used to remove scratches left by the coarser grit and finer grit used for finishing of the surface. Always continue sanding with each grit until surface is uniform. SANDING See Figure 6, page 9. Hold sander in front of and away from you, keeping it clear of the workpiece. Start sander and let the motor build to its maximum speed, then gradually lower on the work with a slight forward movement. Move the sander slowly over workpiece using forward and backward or side to side strokes. Upon completion of sanding operation, always remove sander from workpiece before turning it off. Do not force. The weight of the unit supplies adequate pressure, so let the sandpaper and sander do the work. Applying additional pressure only slows the motor, rapidly wears sandpaper, and greatly reduces sander speed. Excessive pressure will overload the motor causing possible damage from motor overheating and can result in inferior work. Any finish or resin on wood may soften from the frictional heat. Do not allow sanding on one spot too long, as the sander's rapid action may remove too much material, making the surface uneven. 7 - English