Porter-Cable 3807 Saw User Manual


 
12
ADJUSTING BLADE GUARD
1.After an extended period of time, the movable blade guard (A) Fig. 32, might become sloppy and move
erratically when the cuttinghead is lowered. This can be easily corrected by slightly tightening nut (B) until the
lower blade guard (A) moves smoothly.
2. As soon as the cuttinghead begins to lower, the lower blade guard (A) Fig. 32, should begin to move. If it does
not, simply loosen screw (C) Fig. 33, and rotate eccentric (D) so that the eccentric (D) is cont acting the actuating
arm (E) when the cuttinghead is in the top position. Then tighten screw (C).
ADJUSTING THE TENSION OF CUTTINGHEAD RETURN SPRING
The tension of the cuttinghead return spring has been adjusted at the factory in order that the cuttinghead returns to
the up position af ter a cut has been made. If it ever becomes necessary to re-adjust the spring tension, proceed as
follows: T urn adjusting screw (A) Fig. 34, clockwise to increase or counterclockwise to decrease the spring tension.
ADJUSTING SLIDING FIT BETWEEN CUTTINGHEAD ARM AND TRUNNION
After a long period of time it may become necessary to adjust the sliding fit between the cuttinghead arm (B) Fig.
34, and the trunnion (C) by tightening nut (D). Correct adjustment is when a good snug sliding fit is obtained
between these two parts. This adjustment should not be too tight that it restrict s the sliding movement of the
cuttinghead arm (B) or too loose that it af fects the accuracy of the saw cut.
ADJUSTING DOWNWARD TRAVEL
OF SAW BLADE
The downward travel of the saw blade was adjusted at the factory
to prevent the saw blade from contacting any metal surfaces of the
machine. If an ajustment is ever necessary to limit the downward
travel of the saw blade for operations such as dado cutting (see
section of manual on DADO CUTTING ), loosen wing nut (E)
Fig. 34, and make adjustment by turning adjusting screw (F).
Tighten wing nut (E) af ter adjustment is completed.
LOCKING CUTTINGHEAD GUIDE RODS
The cuttinghead guide rods (G) Fig. 34, can be locked in place in
order to use the saw as a conventional miter saw (using the saw
as a chop saw instead of a sliding saw) by tightening lock knob
(H). When using the saw as a chop saw, the cuttinghead should
be all the way to the rear position before locking in place.
ADJUSTING SLIDING FIT BETWEEN GUIDE RODS AND TABLE ASSEMBLY
To adjust the sliding fit between guide rods (G) Fig. 34, and t able assembly (J), remove lock knob (H) and loosen
locknut (K). With wrenches provided, hold locknut (K) while turning adjusting nut (L) clockwise to increase or
counterclockwise to decrease the sliding action of the guide rods (G). This adjustment should not be too tight that
it restrict s the sliding movement of the rods or too loose that it affects the accuracy of the saw cut. When correct
adjustment is made, hold adjusting nut (L) and tighten locknut (K) with wrenches provided. Replace lock knob (H).
Periodically lubricate guide rods (G) using a light oil or spray lubricant to keep the guide rods (G) sliding smoothly.
Fig. 32
A
Fig. 33
E
B
C
D
Fig. 34
B
A
D
C
F
E
J
L
K
G
H