Woodstock W1737 - Manual (Page 23)

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W1737/W1738 Owner's Manual (Mfg. 10/09+)
O
PE
R
ATIO
NS
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 23). 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.
To adjust the jet air flow, do these steps:
1. TURN OFF and LOCK your master power switch.
2. Adjust the air regulator to 70 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 24) 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. Complete Belt Tracking on Page 22.
Figure 23. Air Jet and air fork assembly.
Figure 24. Air Stream adjustment knob.
Air Stream
Receiver
Air Fork
Air Jet
Air Stream
Adjustment
Knob
Lock
Lever
Height
Lever
Scale and
Pointer
Using the Platen
The platen controls ( Figure 25) on your sander allow for
three basic types of sanding. Note: The platen scale is
broken down in millimeter increments, and is for only
reduced-platen sanding depth positions. For aggressive
sanding, retract the platen to the Platen Up position,
adjust the table, and let the drums make the deep cut.
Platen Up — The platen is above the level of the sanding
rollers, so the front roller removes large amounts of
material quickly, but leaves a rough finish.
Platen Even — The platen is even with the sanding
rollers, so the rollers work together with the platen to
produce intermediate/final finishing.
Platen Down — The platen is 2mm below the sanding
rollers, so the platen gives a smooth and feathered
finish. Avoid lowering the platen more than 2MM below
the sanding belt rollers.
Figure 25. Platen controls.