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3.1 Mechanical Unit
The mechanical unit consists of the following:
. Base unit (includes the print-band drive section)
. Print unit
. Forms feed unit
. Ribbon unit
(1)
Base unit
The base unit is fixed to the cabinet frame.
A platen,
a print-band drive
motor, a pair of band pulleys,
and a variable-reluctance transducer for
detecting each type location are in the base unit.
The print-band drive section has a simplified structure for easy
print-band replacement by the operator.
(2) Print unit
The print unit is attached to the base unit and consists of four
haPmner
magnet assemblies and a print unit frame.
The print unit can slide horizontally to the base unit by using a lever on
the base unit to make the forms path wider so that an operator can easily
load
forms.
The hammer magnet assemblies consist of magnet assemblies and hammer
assemblies, with hammers for 136 print positions.
To improve print
quality, rotary-type hammers are employed.
Hammer magnet coils are
arranged with sufficient space around them to ensure hammer-unit
compactness.
(3)' Forms feed unit
The
forus
feed unit is fixed to the print unit frame.
A pair of forms
tractors with a lever for adjusting their horizontal position, forms
tractor drive mechanism,
and a stepper motor to drive the unit are in the
forms feed unit.
The ADVANCE FORMS knob for adjusting the vertical forms
position, and the SHIFT FORMS knob for adjusting horizontal forms position
are also provided.
(4) Ribbon unit
The ribbon unit is fixed to the base unit.
It consists of ribbon feed
KOlbS?CS,
a ribbon
feed,motor,
a ribbon feed sensor,
ribb#on
guides, and a
ribbon container.
3-2
B02P-1500-OOOlA...03