Setting Cutterhead Knives (Straight Knives Only) - Jet JJP-12 Operating Instructions And Parts Manual

Adjustment is performed by means of four
setscrews (B ) that adjust the table pitch and tilt
2
at the back (towards the fence) and two hex cap
screws (A ) that adjust the table toward the front.
1
Adjustment can consist of a front adjustment,
rear adjustment or
combination of both.
Rear adjustment
Tools required – 13mm wrench, 4mm hex
wrench
1. With a 13mm wrench, loosen three hex cap
screws (B ).
1
2. Using a 4mm hex wrench, make very slight
adjustments of 1/8 to 1/4 turns to four
setscrews (B ) as required.
2
A clockwise turn will raise the table; a
counterclockwise turn will lower the table.
Adjusting the two right setscrews will have
greatest adjustment impact to the table's
right side; adjusting the two left setscrews
will have greatest adjustment impact to the
table's left side.
3. When adjustment is complete, tighten the
hex cap screws (B
Front adjustment
Tools required – two 13mm wrenches
1. Hold the hex cap screws (A
one wrench while using the other to loosen
the locking hex nuts.
2. Adjust the screws (A
1/4 turn.
A counterclockwise turn will raise the table;
a clockwise turn will lower the table.
Adjusting the right screw will have greatest
adjustment impact to the table's right side;
adjusting the left screws will have greatest
adjustment impact to the table's left side.
3. When adjustment is complete, secure by
tightening the hex nut while maintaining the
position of the screw with the second
wrench.
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. 10.6, Jointer Table Lock
Handle Adjustment.
(more probable)
).
1
) in place with
1
) slightly from 1/8 to
1
10.3 Setting cutterhead knives
(straight knives only)
Important: Before performing any adjustments
in this section, the infeed and outfeed tables
must be coplanar (see sect. 10.2, Coplanar
a
alignment).
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 the power source.
2. Remove the cutterhead guard (B, Fig. 8).
Refer to Figures 11 and 12:
3. Carefully number each knife blade (C) with a
magic marker to differentiate each.
Note: Rotate the cutterhead via the cutterhead
pulley. Remove the back panel of the cabinet for
access.
4. Rotate the cutterhead (E) and determine the
12 o'clock position of knife number one. The
12 o'clock position is the highest point a
blade will reach in the cutting arc (C, Fig.
12).
5. Set a straightedge (J) on the outfeed table
(F) near the fence (H). One end of the
straight-edge should be positioned over the
cutting knife (C) near the end of the blade as
shown in Fig. 11.
straightedge near blades to prevent damage.
12
Cutterhead knives
Use care when handling the
Figure 11
are