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WORKING PROCEDURE
The action of the Porter-Cable Finishing Sander causes thousands of tiny
abrasive grits to move in circular orbits against the work at high speed. The
cutting action is uniform over the entire pad surface. Crossing and re-crossing of
the abrasive grits from all directions quickly levels surface irregularities to a fine,
uniform smoothness. Start the work with an abrasive grit just coarse enough to
remove the high spots and excessive roughness. Follow with a second sanding
using a grit one or two grades finer. Continue with successively finer grits until
the desired finish is obtained. DO NOT GO FROM A COARSE GRlT TO A VERY
FINE GRIT IN ONE STEP. Swirl marks will be impossible to remove.
REQUIREMENTS FOR FINE FINISHING
In general, the coarser grits remove the most material in the shortest time. The
finer grits produce a smoother finish. By selecting the proper type of abrasive,
your workpiece can have a very smooth and even finish.
REMOVING PAINT AND VARNISH
Read and follow instructions in "ADDITIONAL SAFETY RULES
FOR PAINT REMOVAL".
Your sander will do a good job of removing old paint and varnish if you follow
these two instructions. First, use a coarse, open-coat abrasive to avoid the usual
clogging of the abrasive surfaces. Second, keep the machine moving over new
areas to avoid heating and softening the material being removed. Try to work
the entire surface at the same time by working in wide, overlapping arcs. Do
not concentrate on small areas. If liquid removers or heaters are used to speed
the work, be sure the surface is cool and dry and the excess material has been
scraped away before using the sander.
CABINETS AND DOORS
The orbital motion of the Porter-Cable Finishing Sander is ideally suited for
finishing doors, cabinet fronts, and other workpieces where wood grain is
perpendicular to that of a joining piece. Since the motion is circular, the machine
may be moved in any direction and crossed from one part to the other without
regard to direction of grain. A uniform and smooth finish will result on both parts.
The same procedure may be used to even joints in cabinets The sander may be
worked on both sides and in all directions to obtain a smooth matching joint.
By properly changing from coarser to finer grit abrasives, you can achieve an
excellent finish.
For assistance with your tool, visit our website at www.porter-cable.com for a
list of service centers, or call the Porter-Cable Customer Care Center at
5175.
TROUBLESHOOTING
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