Basic Operations; Dust Collection; Initial Startup; Changing Mode Of Operation - Jet JJP-12 Operating Instructions And Parts Manual

11.0 Basic operations

11.1 Dust collection

Before initial operation, the machine must be
connected to a dust collector.

11.2 Initial startup

After the assembly
complete, the planer is ready to be tested. Turn
on the power supply at the main panel. Press
the Start button. Keep your finger on the Stop
button in case of a problem. The planer should
run smoothly with little or no vibration or rubbing
noises. Investigate and correct the source of any
problems before further operation.
DO NOT attempt to inves-
tigate or adjust the planer while it is running.
Wait until the planer is turned off, unplugged
and all working parts have come to a
complete standstill.
Always wear ANSI-approved
safety glasses or goggles when operating
the jointer-planer.

11.3 Changing mode of operation

When changing the operating mode (planer to
jointer and back) the machine must be turned off
and at a complete standstill. To change the
mode of operation, see sect. 9.1, Jointer to
planer setup and sect. 9.2, Planer to jointer
setup.

11.4 Jointer operations

Correct operating position
The operator must be positioned offset to the
infeed table (Figure 18).
Figure 18
Hand placement
Never pass hands directly
over the cutterhead.
At the start of the cut, the left hand holds the
workpiece firmly against the infeed table and
fence while the right hand pushes the workpiece
in a smooth, even motion toward the cutterhead.
and adjustments are
After the cut is under way, the new surface rests
firmly on the outfeed table. The left hand is
transferred to the outfeed side (Figure 18) and
presses down on this part of the workpiece, at
the same time maintaining flat contact with the
fence. The right hand presses the workpiece
forward and before the right hand reaches the
cutterhead it should be moved to the work on
the outfeed table.
Surfacing
The purpose of planing on a jointer is to produce
one flat surface (Figure 19). The other side can
then be milled to precise, final dimensions on a
thickness planer resulting in a board that is
smooth and flat on both sides and each side
parallel to the other.
If the wood to be jointed is cupped or

bowed, place the concave side down, and
take light cuts until the surface is flat.
Never surface pieces shorter than 12 inches

or thinner than 3/8 inch without the use of a
special work holding fixture.
Never surface pieces thinner than 3 inches

without the use of a push block.
Cuts of approximately 1/16" at a time are

recommended, which provides for better
control over the material being surfaced.
More passes can then be made to reach the
desired depth.
Direction of Grain
Avoid feeding work into the jointer against the
grain (Figure 20). This may result in chipped and
splintered edges.
17
Figure 19