Page 87 - CNC Robotics

CNC Robotics

Figure 3.1
The tools and materia l.

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Artwork

Based on the schematics produced in the last chapter, I created the
artwork for the printed circuit boards. This artwork must be repro-
duced on the surface of the copper in a manner that will enab le it
to act as a resist to the etching solution. In order to make the PCB,
we mu st remove all the unneeded copper from the board, leavi ng
us with the copper traces that take the pl ace of wire. You can wire
a circuit together using breadboards, but the time and effort are
better spent making a PCB to suit. I did build this circuit firs t using
a breadboard but on ly to make sure it was really going to work.
The re are options for the method you employ in transferring the
art to th e copper. The most popular is the photo- resist method .
Electronics suppliers generally sell kits con taining the chemistry
and tools for expos ing and developing presensitized boards.

If you plan on using photo resist, yo u can scan the artwork and
print the transparencies needed. I won 't expand on the photo-
resist method because detailed instructions are incl uded with th e
packaged material.

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