8
BASE CONSTRUCTION
The base should be
cylindrical shaped with a
flat side for the door.
Since the oven is supported
by the base, the material
used should be strong
enough not only to hold the
weight of the oven but
support it during high
winds as well.
The motor is a critical
part of the design. A 12 to
24 volt DC reversible gear
head motor is needed
which turns at 1 to 5
R.P.M. To further slow
the turning rate of the
oven, a chain and sprocket
with a ratio of about 3 to 1
seems to work very well
for final turning speed of 1
to 1/2 R.P.M. The large
sprocket should be placed
on the shaft connected to
the oven base between
leather washers to form a
slip clutch to protect the drive motor and for safety reasons.