©2015
Alvin & CompAny, inC.
3
1101 and 2201 Assembly and Maintenance Instructions
Figure 9
To Maintain:
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 (See
Figure 7
).
To correct, lift ends
A
or
B
while holding down the center
of the straightedge just enough to offset the bow.
Figure 7
To Rewire:
Figure 8
1
2
3
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 wiring
Figure 9
and pass
it around rear pulley (
F
) in upper left corner of board. Connect to
spring at top (
A
).
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
Figure 9
.
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 assembly instructions to
finish installation.
If your wire ever breaks or needs to be replaced, follow these steps:
4
5
6
7
8
9
End
B
End
A
Force
A
F
F
Brake Screw
