54 October 2016
to slice my prints. A slicer takes the .stl file and turns it into
the X, Y, Z position G-Code that the printer understands.
It’s similar to Gerber files for creating circuit boards.
I used a black ABS plastic (same as LEGO blocks) for
the final design (Figure 4),
but any color or plastic type
available for a 3D printer will
work. The 50% fill makes
it a little heavier as well.
The banana jacks and the
internal wiring also make
the unit heavier, but a piece
of sticky back foam or even
a sticky back sandpaper
disk cut to size works great
on the bottom to hold it in
place on your bench.
The 3D printer did the
hard work of creating the
base, so all that was needed
was to add the electrical
connections. I used a 14 gauge household wire to make
the conductors. I stripped off the insulation and then one
end of the bare copper wire was flattened out with a
hammer. I used a sheet metal notcher to cut a V-groove in
n FIGURE 6. Bottom section soldered wires. n FIGURE 7. Testing a resistor.
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