12
Return Spring Adjustment
The
return spring
is located opposite the
downfeed
handle hub
and sets the tension for the downfeed
handle. It is adjusted at the factory and should not
need further adjustment.
If adjustment is deemed necessary:
1. Unplug the machine from the power source.
Referring to Figure 9:
2. Loosen
the
jam nuts
(A) and
hex nut
(B). Do
not remove.
3. Pull out slightly the
coil spring cover
(C) while
firmly holding it. DO NOT allow the coil spring
cover to turn freely in your hand, or the spring
will unwind.
4. Rotate the coil spring cover (C) until the notch
on the cover engages with the
tab
(E) on the
head casting. Turn the cover clock-wise to
decrease tension and counter-clockwise to
increase tension.
5. Tighten
hex nut
(B) firmly by hand against the
cover
(C), then secure by tightening the
jam
nut
(A) against the hex
nut
(B).
Laser Adjustment
The Laser Assembly has been installed and preset
at the factory. It should, however, be checked and
any adjustments made before operating the drill
press. It should also be rechecked periodically, as
constant machine use may cause it to become
misaligned.
To align (refer to Figure 10):
1. Place a small
drill bit
(D) in the
chuck
(C), then
place
board
(F) flat on the table. Do not allow
the board to move from this position; use
clamps if needed.
Important
: The drill press table should be in
horizontal position and locked.
2. Bring the bit down until it leaves a
slight
perforation
in the board (E) then raise it back
up.
3. Connect power to the drill press, and turn on
the laser using the button at the front of the drill
press head.
4. Using a 3mm hex wrench, loosen
setscrews
(A)
on both laser assemblies (only the left side
laser assembly is shown in Figure 10).
5. Adjust (B) so the
laser line
(G) crosses the
perforation (O). Tighten
setscrew
(A).
Figure 9
Figure 10
6.
Adjust the other laser assembly in the same
manner until both laser lines form
cross-
hairs
(G, H) exactly over the
perforation
(E) in
the board.
7. Tighten
both
setscrews
(A).
The laser is now calibrated properly and the
location of your holes can be centered at the
crosshairs for accurate drilling.
Summary of Contents for Bench JDP-12
Page 18: ...18 Assembly Drawing ...