Powermatic PM15, Operating Instructions And Parts Manual

Page: 20 / 40

20
1. To adjust the guides, lower the bed and
place a board of correct width to be molded
under the cutterhead.
2. Loosely adjust the guides to the board.
Rotate the cutterhead by hand and see if
the pattern knife will line up with the board.
Adjust accordingly until the pattern knife and
board are lined up as in Figure 33.
3. When properly adjusted, firmly tighten the
bed guides.
NOTE: On some pattern knives the cutter trims
a small portion of the width away as it cuts the
pattern. The outfeed guides on the bedboard
must be adjusted to compensate for the
decreased width of the molding.
Face Molding with pattern knives
The art of creating quality molding requires
planning your molding operations prior to
starting. The depth of cut can dictate the
smoothness of the finish. Remember, a light cut
creates a finer finish than a heavier cut.
Always pre-size your stock to within 1/16” of the
final thickness before running your molding. If
possible, pre-size it to within 1/8” in width also
as shown in Figure 34. Before you begin
molding, you must also consider the hardness of
the board, its moisture content, straightness,
grain direction, and grain structure. All of these
factors will play a part in the quality of your
molding.
Stand to one side of the machine and start the
board under the infeed roller so that it travels in
a straight line. When the feed roller takes hold,
let go of the piece and remain standing to one
side of the machine – not in direct line with the
board. The power feed completes the travel
without further pushing or pulling.
Edge Molding with pattern knives
This procedure is easily done by installing the
proper pattern knife and setting up the bedboard
and guide system with guides tall enough to
hold the stock on edge.
Edge Planing
A bedboard must be installed
on the planer when edge planing .
Edge planing can be done on stock up to 3/4”
thick and 11” wide with the following set-up:
Install the rabbet cutter knife, at the right or left
edge of the cutterhead, so that the rabbet knife
extends inside of the guide approximately 1/16”
to 1/8” or just enough to clean up the stock. See
Figure 35.
Figure 33
Figure 34
Figure 35