Jet Tools Drum Sander - Manual (Page 17)

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5. If the drum does not contact the thickness
gauge to the same degree as the opposite
end of the drum, alignment is necessary.
To align the drum:
1. Loosen the four 3/8” hex cap screws – two
front, two rear (A, Figure 22). This allows the
entire drum carriage and shroud to be
pivoted on two screws – one screw in front,
one in back.
2. Lay the thickness gauge under the drum
lengthwise. See Figure 23. Rotate the fine
tune adjustment knob (B, Figure 22) until
the drum contacts the gauge equally along
its entire surface. Rotate the knob clockwise
to raise the outboard end of the drum,
counterclockwise to lower the outboard end
of the drum. Use the height adjustment
handwheel to raise or lower the entire drum.
3. When drum is parallel to conveyor, tighten
the four screws (A, Figure 22).
Fine Tuning Drum Alignment
NOTE: This is an operational test. Perform this
alignment after you have become familiar with
sander operation.
When sanding boards wider than the drum,
drum alignment is critical and must be adjusted
exactly level to slightly higher on the outboard
end. This will prevent any ridges from
developing in the stock. Always check this on a
piece of scrap wood, as follows, before sanding
the work piece.
1. Run a piece of scrap wood approximately 6”
wide by 30” to 40” long through the sander
sideways so that the end of the board
extends past the end of the drum.
2. Without changing drum height, rotate the
board 180° and sand the same side.
3. If a ridge is visible where the drum overlaps,
loosen the four screws (A, Figure 22) and
raise the outboard end of the drum by
turning the fine tune adjustment knob (B,
Figure 22) slightly clockwise.
Important: Only turn fine tune adjustment knob
when all four screws (A, Figure 22) are loose.
4. Repeat this process until the ridge is
eliminated and the entire board is sanded.
5. Tighten the four screws (A, Figure 23).
Figure 22
(conveyor table removed for clarity)
Figure 23