Alvin PXB Series Instructions For Use

Thank you for purchasing an Alvin PXB
Series Parallel Straightedge Drawing
Board. With proper care and handling
your PXB will provide you with years
of accurate and productive use.

General Usage Information

The PXB is shipped with the straightedge locked in the middle of the board.
To release the straightedge, loosen both of the brake knobs ( A ). To lock the
straightedge in any position on the board, tighten the brake knobs gently.
(see Figure 1)
The PXB can be used in the flat or elevated position. Open or close the legs
( D ) underneath for desired angle. Rubber grip tracks ( E ) under board catch
on the edge of a table to bring the drawing surface closer to the user and
increase the working angle for comfort. (see Figure 2)
The straightedge is designed to be lifted slightly off the surface of
the board when sliding it up and down so that the work beneath it
is not damaged or smudged. There is sufficient clearance to put
3/16" foamboard under the straightedge.

To Fine Tune Straightedge Parallelism

There may be times when you tape a project to the board and find
that the existing lines aren't exactly parallel to the straightedge.
Instead of pulling the project off and retaping, you can fine tune the parallelism of the straightedge.
Release brake knobs ( A ). (see Figure 1)
1
Loosen (don't unscrew completely) the fine tune parallel knob ( B ) on either side of the straightedge.
2
Adjust the position of the end bracket ( C ) until the straightedge is parallel with your work.
3
Retighten the fine tune parallel knob.
4
If additional fine tune adjustment is necessary, repeat on the opposite end of the straightedge.
5

To Adjust Parallelism When Fine Tuning Is Not Enough

Make sure the fine tune parallel knobs on both sides are tight ( B ). (see Figure 1)
1
Release brake knobs ( F ). (see Figure 3)
2
Loosen (don't unscrew completely) one of the wire capture knobs ( G ) on either
3
side of the straightedge.
Make sure board is facing up and slide the end bracket ( H ) along the wire until the
4
straightedge reaches the desired parallel position.
Retighten the wire capture knob securely.
5
PXB Series Parallel Straightedge Board
Usage & Care Instructions
PXB Series 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"
B
C
Figure 1
D
E
Figure 2
H
F
Figure 3
A
Table
G