Alvin PXB21 Manual

PXB & PLB Parallel Straightedge Board
Operation and Maintenance Instructions
PXB Boards are available
in the following sizes:
PXB21 16" x 21"
PXB24 18" x 24"
PXB26 20" x 26"
PXB31 23" x 31"
PXB36 24" x 36"
PXB42 30" x 42"
PLB Boards are available
in the following sizes:
PLB24 18" x 24"
PLB26 20" x 26"
PLB36 24" x 36"
Follow this recommended sequence when making adjustments to the position of the straightedge blade.
To Set Brakes for Optimum Braking Strength (Diagram A)
Unscrew brake knobs as far as they will go.
Retighten brake knobs one full revolution only.
Loosen top adjustment knobs.
Push metal side brackets toward the center until
both brake pads rest against edges of board.
Retighten top adjustment knobs.
Brakes are now set and ready to use. Simply
tighten and loosen brake knobs as necessary.
Be sure to keep top adjustment knobs tightly
secured or the brakes will not function.
To Adjust Straightedge Blade Parallel
to Edge of Board (Diagram A)
Loosen only one wire capture screw on of the blade.
Pivot the blade until it is in the desired parallel position.
Retighten wire capture screw.
Keep all adjustment knobs tight to ensure straightedge stays parallel.
To Replace or Reset the Wire (Diagram B)
Blade should be positioned in center of board when rewiring
and spring should be centered.
Attach eyelet to one end of wire and connect eyelet to spring.
Thread wire around pulleys as shown.
Extend spring approximately 1" beyond unstretched length.
Secure wire to second eyelet and trim excess.
1
1
1
2
2
2
3
3
3
4
4
4
5
5
6
7
Side
Bracket
Brake
Knob
Brake
Pad Wire
Capture
Screw
Wire
Diagram A
Top
Adjustment
Knob
Straightedge
Blade
Board
Spring rides
on top of wire
Diagram B
Lock
Unlock
Lock
Unlock
Snap Lock
Mechanism

Dual Snap Lock Leg Instructions (Diagram B)
To Position Tilting Legs for Use
Unlock legs by pushing locks toward edges of board.
Extend legs. Do not over extend.
Push locks toward center of board until they snap into position.
Gently test legs are secure.
To transport or store, repeat unlocking and locking actions to tilt legs flat against board.
Note: Transport using handle to avoid damage.
Troubleshooting
If brakes do not hold firmly, follow instructions in To Set Brakes for Optimum Braking Strength section.
If straightedge is not parallel, follow adjustment instructions in To Adjust Straightedge Blade Parallel to Edge of Board section.
If straightedge does not slide easily up and down:
Check that brakes are not dragging.
Check that wires pass properly through pulleys.
Check that pulleys are spinning freely.
Check that spring is not running into pulleys.
Care and Handling
Clean board surface and underside of blade with mild detergent and soft cloth and wipe dry.
Avoid direct exposure to sunlight or extreme heat.
Protect from damage by storing and transporting in a protective case.
Do not move straightedge with brakes tightened. Always move straightedge with a smooth, easy motion.
1
2
3
4
1
2
3
4
5
Spare Parts
Spare parts can be ordered from Alvin retailers.
Visit www.alvinco.com to locate a retailer.
Item No. Description
PRP Repair kit contains wire, spring, 4 pulleys, 4 brackets
BLX21 21" straightedge blade for PXB21
BLX24 24" straightedge blade for PXB24
BLX26 26" straightedge blade for PXB26
BLX31 31" straightedge blade for PXB31
BLX36 36" straightedge blade for PXB36
BLX42 42" straightedge blade for PXB42
MSB2 Metal side brackets, set of 2
TH2 Metal thumb screws, set of 2
TF2 Rubber grip track cleats, set of 2
PX-SM Legs and handle for PXB21, 24, 26, and PLB24, 26
PX-LG Legs and handle for PXB31, 36, 42, and PLB36
www.alvinco.com • [email protected]
LIT-A11080 1/12
©2012 ALVIN & COMPANY, INC. • P.O. Box 188, Windsor, CT 06095-0722
Phone: [phone] • Toll-Free: 800-444-2584 • Fax: [phone] • Toll-Free Fax: [phone]