Jet JPJ-12B, Operating Instructions And Parts Manual

Page: 13 / 48

13
It may be necessary to repeat the exercise in this
section more than once to achieve coplanar
alignment.
Note: If the tables do not lock properly after the
adjustment, see sect. 10.7, Jointer Table Lock
Handle Adjustment .
Figure 12
10.4 Setting Knives at Correct Height
and Parallel to Outfeed Table
Refer to Figures 13 - 17:
For accurate jointing, the outfeed table surface
must be level with the knives (or knife inserts for
the helical cutterhead) at the high point of their
arc. In addition, on the straight cutterhead, the
knives must be parallel with the outfeed table
along the entire length of the knives.
When you receive the jointer, the knives have
been pre-set at the factory. However, the height
and parallelism of the knives with the outfeed
table should be checked, and any needed
adjustments made, before operating the jointer.
Height setting of knives is not applicable to the
helical head model, in which the knife inserts are
immediately at the proper height after installing.
However, the height of the outfeed table must still
be verified in relation to the arc of the knife
inserts, as follows.
Important : Before performing any adjustments in
this section, the infeed and outfeed tables must
be coplanar (see
sect. 10.3, Coplanar Alignment ).
Preparation
Disconnect machine from
power source before making any
adjustments. Failure to comply may cause
serious injury.
Cutterhead knives are
dangerously sharp! Use extreme caution
when inspecting, removing, sharpening, or
replacing knives into the cutterhead. Failure
to comply may cause serious injury!
1. Disconnect machine from power source.
2. Fully swing the cutterhead guard (G, Fig. 11)
away from the fence (B, Fig. 11). It is
recommended to then use a 6mm hex
wrench (one is included with the machine) as
a makeshift stop to hold the guard in place.
To do this, insert the wrench into the front
right roller tension adjustment screw. The
cutterhead guard can then be released and
the wrench will prevent it from swinging back
towards the fence.
3. Remove the fence assembly (A, Fig. 17) and
upper back panel (C, Fig. 17) to access the
cutterhead pulley (O, Fig. 19).
Setting the Outfeed Table Height
Use care when handling the
straightedge near blades to prevent damage.
4. Place a straightedge (B) on the outfeed table
(A) near the back of the table. One end of the
straightedge should be positioned over the
cutting knife (E) near the end of the blade as
shown in Figure 16.
Always rotate the cutterhead (D)
via the cutterhead pulley (O, Fig. 19). Do not
contact the cutterhead itself to rotate it.
5. Rotate the cutterhead (D) until one of the
blades is at its highest point in its cutting arc.
6. Loosen outfeed table lock handle (C, Fig. 7).
7. Use the outfeed table adjustment handle (B,
Fig. 7) to lower the outfeed table (A) until the
straightedge (B) contacts the knife (E), as
shown in Figure 13. Rock the cutterhead (D)
slightly to make sure the apex of the knife is
contacting the
straightedge (B).