Ricoh C226 Service Manual page 87

T3: When the drum rotates 58.5
degrees more, the drum master
clamper is completely open,
and the drum stops.
When the drum stops, the original
will be fed. After the original has
been fed 15.5 millimeters, the master
will start being fed, and the thermal
head will start plotting the master.
At the same time, the reverse roller
magnetic clutch will turn to feed the
master 38 millimeters. The master
will start to buckle when the reverse
roller magnetic clutch turns off.
T4: After the reverse roller magnetic
clutch is turned off, the master is
fed 5 millimeters more. Then, the
master feed clamper solenoid is
de-energized and the master clamper
is closed. (At this moment, the master
plotting has already begun.)
Because the shockwave from
clamping might affect plotting
(for instance by jiggling the master
above the thermal head). The extra
5 millimeters that the master is fed
will buckle the master and the buckle
will absorb the shockwave.
SM 2-38
MASTER FEED SECTION
C226