Part of my job is drafting. I enjoy using the computer for drawing not
only technical things but recreation. In
2009 I even drew a comic using
a USB drawing pad. There is still
something about holding actual pens and making imperfect lines on a piece of
flimsy graph paper.
A drafted image is much cleaner and other people with the
same program can edit and improve it.
But a piece of paper with a hand-drawn sketch is unique, almost an
artifact. I’m waxing romantic here but
parents hang crayon drawings on the fridge because they are precious in the
same way.
Enough background.
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Parts and a design were gathered to mount the glue gun
nozzle. The design was hand-drawn on
graph paper with colored pens.
Hand-drawn sketch of what to make
The long bolt in the nozzle was replaced with a short #8
bolt.
Short bolt in the glue nozzle
The aluminum bar mount for the mounting the nozzle was shortened
and made the same length from the center of the large nozzle hole. The ends were cut with a horizontal band saw
then cleaned up with a belt sander.
Positions were marked 1 ½” from the center of the nozzle hole by making
divots with a center punch. The bar was
clamped in place on the plastic piece.
The threaded shafts had to be removed for this. The aluminum bar and plastic piece were propped
on wooden slats and drilled with pilot holes.
The plastic was drilled to 5/32” and the aluminum was drilled to 3/16”. The underside of the plastic had the mounting
holes countersunk. The central hole for
the glue gun nozzle was given a pilot hole then the countersinking bit (1/2”)
was used to drill to the bottom to give a V-shaped hole for the glue nozzle.
Hole drilled for glue nozzle
The aluminum bar had the small nozzle mounting hole
redrilled so it could mount straight.
Nuts were put on the short bolt and tightened to secure the nozzle in
place
Remounted glue nozzle
Remounted glue nozzle from side
Long #8 countersunk bolts were inserted into the plastic
from below and the aluminum bar with nozzle was fixed in place by putting nuts
on either side of the aluminum bar and tightened.
Mounted glue nozzle from side
While the shafts were removed they were sat next to each
other and the nuts were adjusted to assure they were all the same.
Identical shafts
A saw blade was degreased by using dish detergent
available at the hack space’s kitchen unit.
The clean blade was put over the end of a servo and a servo horn was put
over that. The two were held together
tightly and hot glue was applied. It was
allowed to cool in place then removed and stored in a plastic container for
safety.
Hack space degreaser
Servo in place 1
Servo in place 2
Blade glued to servo horn HOT
Blade glued to servo horn cooled
Blade and servo horn safely stored in plastic container
The schematics were updated to use different color lines
for power, 0V, and signals. The debugging
hardware was cordoned off to show it was modular.
Updated schematics
To do:
- Mount glue servo
- Design and build proto board circuit
- Install in mint tin enclosure
- Test + Debug
- Revise documentation
Journal page 1
Journal page 2
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