Porter Cable 503 Manual Del Instrucciones página 10

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TO USE:
1. HOLD sander OFF the work
and start motor.
2. LOWER sander to the work,
letting the rear part of the belt touch
first. Level the machine as it is
moved forward.
3. GUIDE the machine over the
work in overlapping strokes,
allowing the sander to do the work.
Fig. 4
4. AVOID applying excessive
pressure when sanding. The weight
of the machine is usually sufficient for a fast, smooth finish.
5. WORK BACK and FORTH over a wide area to obtain an even surface.
6. DO NOT tilt the machine or sand with the edge of the belt.
7. Do not pause in any one spot during the sanding operation.
8. Lift sander from work before turning OFF motor.
9. ALWAYS be sure motor has completely stopped before putting sander down.
FAST SANDING ON ROUGH WORK
To smooth a rough surface quickly, use a coarse grit abrasive belt. With
the belt positioned diagonally
across the grain (see Fig. 5), move
the sander in the direction of the
grain. Overlap the strokes and
work the entire surface from both
sides of the board (once with the
sander angled to the left and once
angled to the right). Smooth the
surface by guiding the sander
back and forth with the grain.
Change the belt to a medium grit
Fig. 5
and follow the same procedure. Finish by thoroughly sanding over the
grain lengthwise. Change again to a fine grit and work back and forth
with the grain. Always finish by sanding with the grain.
REMOVING OLD PAINT AND VARNISH
This sander is an excellent tool for removing old paint and varnish from
flat surfaces. Two problems are common to such work: (1) loading the
abrasive with the material being removed and (2) overheating the paint or
varnish by working too long in one place.
Use a spaced grain or open coat abrasive belt and a single stroke action
to overcome the loading problem. Lower the sander at the far end of the
work and pull back. Raise the machine and do the same in a different
location. Overheating can be avoided by using a fairly quick stroke. A
piece of felt about ¼" thick can be inserted under the shoe for fast spot
sanding and for working on stubborn areas of paint and varnish.
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504

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