Alvin PXB Series Instructions

Follow this recommended sequence when making adjustments to the position of the straightedge blade.

To Set Brakes for Optimum Braking Strength

Unscrew brake knobs as far as they will go.
1
Retighten brake knobs one full revolution only.
2
Loosen top adjustment knobs.
3
Push metal side brackets toward the center until
4
both brake pads rest against edges of board.
Retighten top adjustment knobs.
5
Brakes are now set and ready to use. Simply
6
tighten and loosen brake knobs as necessary.
Be sure to keep top adjustment knobs tightly
7
secured or the brakes will not function.

To Set Straightedge Blade Parallel to Edge of Board

Loosen one wire capture screw on either side of the blade.
1
Pivot the blade until it is in the desired parallel position.
2
Retighten wire capture screw.
3

To Replace or Reset the Wire

Blade should be positioned in center of board when rewiring
1
and spring should be centered.
Attach eyelet to one end of wire and connect eyelet to spring.
2
Thread wire around pulleys as shown in diagram ( B ).
3
Extend spring approximately 1" beyond unstretched length.
4
Secure wire to second eyelet and trim excess.
5
PXB Parallel Straightedge Board
Instructions
PXB Boards are available
in the following sizes:
PXB21
PXB24
PXB26
PXB31
PXB36
PXB42
Top
Adjustment
Knob
Side
Bracket
Brake
Knob
Brake
Pad
Wire
Capture
Screw
Spring rides
on top of wire
16" x 21"
18" x 24"
20" x 26"
23" x 31"
24" x 36"
30" x 42"
Straightedge
Blade
Board
Wire
Diagram A
Diagram B