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B. DRIVING MECHANISM, PRELOAD CLUTCH (FIGURE AE, PART 2)
Note
When using
a
PRELOAD CLUTCH (AE-36)
(with splined armature) in Model 306,
USE POWER DRIVER BOARD ASSEMBLt
63060105-4005 configured especially
for preloaded clutch operation and
four or eight inches per second (IPS)
paper slew speed.
For AIR-GAP CLUTCH
OPERATION, USE POWER DRIVER BOARD
63060105-4001.
This part 2 portion of the driving mechanism pertains to power
transmitted from the driving pulley (AE-1) using a preload
clutch assembly.
Drive pulley (AE-1) - clutch shaft (AE-34) - rotor (AE-26) -
splined armature (AE-27) - hub (AE-28) - spring (AE-29) - drive
pulley (AE-18).
The clutch shaft, with fixed drive pulley (AE-1), rotates con-
tinuously in a clockwise direction through slip clutch mechanism
(AJ-40, 41, 46) in the paper feed mechanism
(AJ)~
This rotation
is maintained through a clutch field (AE-30) assembly, and when
activated, the splined armature (AE-27) is pulled against the
rotor, and friction torque is continued, causing the head and
carriage to move in the forward direction (to the right). Drive
is disconnected between splined armature and rotor when signals
to the clutch field assembly (AE-30) are discontinued; the head
and carriage are then under spring (AG-20) return to left margin.
Because of a preload condition (surface to surface contact) be-
tween armature and rotor, there is no gap adjustment. The
tension against the rotor is maintained by a clutch spring (AE-29)
pressing between the fixed, forward driving pulley (AE-18) and
the splined armature.
The hub (AE-28) inserts into the splined armature maintaining
torque drive for the mounted forward drive pulley at the
opposite end.
The clutch field unit (AE-30) is prevented from rotating about
its shaft (part of pinned rotor) by means of a clutch turning
stopper (AE-12) mounted directly to the base of the printer.
5-15
Rev. E
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