Woodstock W1751 - Manual (Page 25)

-23-
W1751 25" Wide-Belt Sander
O
PE
R
AT
IO
N
S
Jet Air Flow
The air jet located at the air fork sends a stream of air
across the air fork and into the air stream receiver (see
Figure 18). As soon as the sanding belt obstructs this
stream of air, a piston changes the direction of belt
movement to the left. Your goal is to adjust this stream
of air so the system uses the least amount of air and
yet the machine still oscillates consistently and without
delay.
To adjust the jet air flow, do these steps:
1. DISCONNECT THE SANDER FROM POWER.
2. Adjust the air regulator to 75 PSI.
3. Open both upper access doors on the sander, loosen
the sanding belt tension, and slide the belt so the
air stream is unobstructed.
4. Loosen the jam nut and turn the jet adjustment
knob ( Figure 19) clockwise until the air stream is
reduced to a minimum.
5. Turn the jet adjustment knob counterclockwise,
and use a piece of cardboard to alternately block
and unblock the air stream until the upper drum
just begins to react and move left and right.
6. Turn the jet adjustment knob counterclockwise an
additional 1 ⁄
2
turn and tighten the jam nut.
7. Now do the Belt Tracking procedure on Page 24.
Figure 18. Air jet and air fork assembly.
Figure 19. Jet adjustment knob.
Air Jet