Dewalt DWE490-B2 Instruction Manual - Page 38

English Fig. I 2 1 The lock-on button 2 and be engaged to lock the trigger in the depressed position providing increased comfort in extended use applications. To unlock the trigger and turn the tool off, depress and release trigger. NOTE: Allow the tool to reach full speed before touching tool to work surface. Lift the tool from the work surface before turning the tool off. CAUTION: Make sure the wheel has come to a complete stop before setting the tool down. Surface Grinding, Sanding and Wire Brushing CAUTION: Always use the correct guard per the instructions in this manual. WARNING: Metal dust build-up. Extensive use of flap discs in metal applications can result in the increased potential for electric shock. To reduce this risk, insert an RCD before use and clean the ventilation slots daily by blowing dry compressed air into the ventilation slots inaccordance with the below maintenance instructions. To perform work on a the surface of a workpiece: 1. Allow the tool to reach full speed before touching the tool to the work surface. 2. Apply minimum pressure to the work surface, allowing the tool to operate at high speed. Material removal rate is greatest when the tool operates at high speed. Angle 3. Maintain an appropriate angle between the tool and work surface. Refer to the chart according to particular function. Function Grinding Grinding with a Flaring Cup Wheel Sanding with Flap Disc Sanding with Backing Pad Angle 20˚-30˚ 5˚-10˚ 5˚-10˚ 5˚-15˚ Wire Brushing 5˚-10˚ 4. Maintain contact between the edge of the wheel and the work surface. -- If grinding, sanding with flap discs or wire brushing move the tool continuously in a forward and back motion to avoid creating gouges in the work surface. -- If sanding with a backing pad, move the tool constantly in a straight line to prevent burning and swirling of work surface. Always use the appropriate grit sandpaper for your application NOTE: Allowing the tool to rest on the work surface without moving will damage the work piece. 5. Remove the tool from work surface before turning tool off. Allow the tool to stop rotating before laying it down. CAUTION: Use extra care when working over an edge, as a sudden sharp movement of grinder may be experienced. Precautions To Take When Working on a Painted Workpiece 1. Sanding or wire brushing of lead based paint is NOT RECOMMENDED due to the difficulty of controlling the contaminated dust. The greatest danger of lead poisoning is to children and pregnant women. 2. Since it is difficult to identify whether or not a paint contains lead without a chemical analysis, we recommend the following precautions when sanding any paint: Personal Safety 1. No children or pregnant women should enter the work area where the paint sanding or wire brushing is being done until all clean up is completed. 2. A dust mask or respirator should be worn by all persons entering the work area. The filter should be replaced daily or whenever the wearer has difficulty breathing. NOTE: Only those dust masks suitable for working with lead paint dust and fumes should be used. Ordinary painting masks do not offer this protection. See your local hardware dealer for the proper N.I.O.S.H. approved mask. 3. NO EATING, DRINKING or SMOKING should be done in the work area to prevent ingesting contaminated paint particles. Workers should wash and clean up BEFORE eating, drinking or smoking. Articles of food, drink, or smoking should not be left in the work area where dust would settle on them. Environmental Safety 1. Paint should be removed in such a manner as to minimize the amount of dust generated. 2. Areas where paint removal is occurring should be sealed with plastic sheeting of 4 mils thickness. 3. Sanding should be done in a manner to reduce tracking of paint dust outside the work area. Cleaning and Disposal 1. All surfaces in the work area should be vacuumed and thoroughly cleaned daily for the duration of the sanding project. Vacuum filter bags should be changed frequently. 36