Ryobi S652DK English Manual - Page 11

OPERATION WARNING: Always wear safety goggles or safety glasses with side shields when operating your sander. Failure to do so could result in foreign objects being thrown into your eyes resulting in possible serious injury. If the sanding operating is dusty, also wear a face or dust mask. 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. Note: DO NOT use sander without sandpaper. Doing so will damage the cushion. Fig. 4 CAUTION: Be careful not to let your hand completely cover air vents. SANDING See Figures 4 - 5. Clamp or otherwise secure the work to prevent it from moving under the sander. Fig. 5 WARNING: Unsecured work could be thrown towards the operator causing injury. Hold the sander in front and away from you, keeping it clear of the workpiece. Start the sander by pressing the switch button to "ON" position and letting the motor build to its maximum speed. Gradually lower the sander on the work with a slight forward movement. Move it slowly using forward and backward strokes. 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. Flush sanding can be performed with the sander. The front edge of the sander allows flush sanding in corners. Always remove the sander from the workpiece before turning the sander off. WARNING: Do not wear loose clothing or jewelry when operating sander. They could get caught in moving parts causing serious injury. Keep head away from sander and sanding area. Hair could be drawn into sander causing serious injury. 11