3. EASY SEWER PIPE LENS FOCUSING
3a. Fit the sewer pipe to the coupler. The projector
triplet lens is mounted in a 40mm slice of 3" ABS
pipe, which slides into a 40mm chunk of 3" ABS
pipe coupler. As couplers are tapered, you’ll need
to wear a dust mask and sand the interior of the
coupler until the pipe is snug but slideable.
3b. Screw in the lens. The wall of the 3" pipe is
thick enough to drill pilot holes and screw in the
lens. Use a 4" hole saw to cut the lens hole in the
projector box. For a snug fit, use a strip of the fuzzy
side of velcro to line the lens hole.
4. EPOXY PUTTY THE REFLECTOR MOUNT
4a. Admire the epoxy putty. Epoxy putty saves
the day again! Oh, epoxy putty, is there anything
you can’t do? Epoxy-putty the bolt to the reflector.
Under that lump of epoxy putty is the head of a
standard 2" bolt that provides a strong, adjustable,
and threaded stud to aid in the mounting.
4b. Mount the reflector hardware. A ¼" eyelet bolt is sandwiched between a
pair of 2" nuts and washers. Though not classically beautiful, it’s adjustable
and it works! Perhaps I should have carved my initials in the epoxy. The finished
reflector hardware is connected to a coupler nut and held fast with a pair of
standard nuts. The ¼" threaded stock then continues through the bottom
of the cabinet.
56 Make: Volume 11