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Rev. E
AD-17
(BEHIND BRACKET (AD-16)
DRIVING MECHANISM - AD -
(1)
DRIVING MECHANISM - AE -
(2)
500 GRAMS
(17.6 OZ.)
3-6 MM
(0.1-0.2-IN.)
AE-I
Figure 5-4. ADJUSTMENT OF TIMING BELT (AD-41)
(VIEW FROM BACK OF PRINTER, FORWARD)
5.2.5
DRIVING MECHANISM (Figure AE, Part 2)
5.2.5.1
Operation
The function of this driving mechanism (AE - part 2) is based upon
two types of clutches used in the printer:
(I) air gap clutch or (2) pre-
load clutch (later design).
A. DRIVING MECHANISM, AIR GAP CLUTCH
This second portion of the driving mechanism (AE) pertains to
power transmitted from the drive pulley (B) (AE-I) which rotates
clutch shaft (part of AE-3). When the electromagnetic clutch
unit (AE-3) is activated by logic signals, the clutch armature
(AE-3-3) and driving pulley (C) (AE-IS) (for main drive belt)
(AE-9) rotate under friction force (via rotor) causing the
print head to move to the right. As the carriage, with magnet
on the underside, moves over the right reed switch (AG-I), the
signal current stops and the clutch armature is restored to
open position by springs mounted on it, and torque drive between
armature (AE-3-3) and rotor (part of AE-3) is disconnected. The
electromagnetic clutch unit (AE-3) is prevented from rotating
about its shaft by means of a clutch turning stopper
(l)
(AE-12)
tab mounted on the base of the printer.
5-14
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