Alvin DPX Series Troubleshooting guide

DPX Series Deluxe Drawing Board
Operation and Maintenance Instructions For models
DPX36 and DPX42
Note: Deluxe Drawing Board incorporates an Alvin®1101 series Parallel Straightedge and VYCO board cover.
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2
3
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5
To Adjust and Lock
Parallel Straightedge Position (Diagram A)
Be sure all three brake knobs are free and loose.
Grasp one end of straightedge and hold firmly against
drawing board.
Gently pivot other end of straightedge up or down until
desired parallel position is reached.
Secure wire under thumbscrew brake (B) in upper right
corner to maintain parallel positioning.
With straightedge in desired position, gently tighten both
left and right thumbscrew brakes (A).
CAUTION
Do not overtighten. Overtightening brake
screws will damage wires.
Diagram A
A A
B
To Maintain Straightedge (Diagram B)
Due to the Laminar construction of this straightedge, it is
possible to have the center bowed if the straightedge is
subjected to any sizeable force acting in the vertical direction.
To correct, lift ends Aor Bwhile holding down the center
of the straightedge just enough to offset the bow.
Diagram B
End
B
End
A
Force
Care and Handling
Avoid over tightening brake screws or damage may occur.
Clean board surface and underside of blade with mild detergent and soft cloth. Wipe dry.
When transporting or storing the DPX, lock the straightedge at the bottom edge of the board to minimize the chance of damage.
Protect your DPX from damage by storing and transporting in a protective case.
Do not attempt to move straightedge with brakes tightened.
Avoid direct exposure to sunlight and extreme heat.

Diagram D
To Rewire (Diagrams C & D)
If your wire ever breaks or needs to be replaced, follow these steps:
Diagram C
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Release left and right end caps of the straightedge by removing
screws from below. Be sure not to remove screws that keep top
and bottom layers of straightedge blade together.
Remove all old wires.
Fold new replacement wire in half and thread folded end through
center of straightedge blade. Pull through until wire is equal length
on each side of the straightedge blade. Cut wire at fold. There are
now two independent wires running through straightedge blade.
Grasp either wire on left side, pass around straightedge blade
pulley and brake screw as shown in Diagram D and pass
it around rear pulley (D) in upper left corner of board. Connect to
spring at top (C). (See Diagram C)
Grasp the wire on right side not connected to spring from left
side. Trial and error method will be required here. Pass this wire
around straightedge blade pulley and brake screw, then pass
it around pulley in upper right corner of board. Connect to
spring at top.
Pass lower left and lower right wires around straightedge blade
pulleys and brake screws as shown in wiring Diagram C.
To confirm wires have been strung correctly, hold straightedge
in place with one hand and pull gently on lower left wire with
other hand. The spring at top should move to the right. Repeat by
pulling the lower right wire and the spring should move to the left.
Replace straightedge end caps and secure with screws from
below. Be sure that wires remain properly threaded around pulleys
and brake screws and pass properly through exit slots in end
caps. Do not over tighten or strip screws.
Follow steps 8 through 10 of straightedge assembly instructions
to finish installation.
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9
C
DD
©2013 ALVIN & COMPANY, INC. • P.O. Box 188, Windsor, CT 06095-0722
Phone: [phone] • Toll-Free: 800-444-2584 • Fax: [phone] • Toll-Free Fax: [phone]
www.alvinco.com
LIT-A13157 9/13
Brake Screw
#HD4 – Straightedge Hardware Kit
Contains:
2 Front Wire Connectors
2 Rear Pulley Assemblies
8 Screws (6 x 3/4" and 2 x 5/8")
Wire not included and must
be ordered separately.
#PEP-2 – Straightedge Rewiring Kit
Contains:
1 Spring
2 Eyelets
2 Front Wire Connectors
30 Feet of Wire
(for straightedges 30" to 72" in length)
Replacement Parts
#KN4 – Replacement Brake Knobs
for models made after 2009
Contains:
2 EP3 Straightedge Brake Knobs
1 Wire Brake Knob
2 New Style T-Shaped Brakes
1 Clinch Stud
#EP3 – Replacement
Straightedge End Caps
for models made after 2010
Contains:
2 New End Caps
4 Screws