Ricoh VT3500, Service Manual

Page: 72 / 330

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
starts being fed. After the original
has been fed 15.5 millimeters, the
master starts being fed, and the
thermal head starts plotting on the
master.
At the same time, the reverse roller
magnetic clutch also turns to feed
the master 38 millimeters. The
master starts buckling when the
reverse roller magnetic clutch turns
off.
T4: After the reverse roller magnetic
clutch turns 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 of the master feed will
buckle the master and the buckle
will absorb the shockwave.
240°
80°
58.5°
160°
218.5°
0°
298.5°
0°
298.5°
80°
298.5°
1 December 1993
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