A to Z Rubber Stamps 01-07554-000170, Руководство пользователя

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INTRODUCTION
Rapidprint's electronic A-Series Automatic Time Stamps, Date Stamps, and Numbering
Machines offer electronic control circuitry which enables the user to select the imprint
strength needed for the particular form and applications and assures consistent imprints
from one impression to the next.
Rapidprint also offers a visual clock optional on all models.
In addition to the advantages described, the electronic circuitry will also provide longer
life and trouble free service since electronic components do not undergo wear and have a
longer operating life. The number of components necessary to achieve the sensing and
control functions are greatly reduced, thus further assuring greater reliability.
THEORY OF OPERATION
AR-E, AD-E, ARC-E, ARL-E, AN-E, ADN-E
The circuit boards incorporated into the AR-E/AN-E machines contain the electronic
circuitry which permits very close control of the action of the printing solenoid. This control
is essential for consistent prints and to allow full adjustment of printing force.
The circuit boards make electrical connection to the machine wiring through a 15 pin
edge connector. All wiring is brought to this connector and provision is made on the circuit
boards for accommodating all options offered for AR-E/AN-E machines.
Actuation Of Printing Mechanism ( figure 1 )
Inward movement of a document into the throat of the machine pushes back the trigger
assembly (a) . This action moves the trigger arm (b) downward, releasing the snap-action
switch button (c) . The resulting signal anticipates the timing of the next positive-passing of
the line voltage through zero. At this instant, a controlled delay is initiated which
determines the amount of energy delivered to the imprint solenoid
(d) .
A potentiometer allows adjustment of this energy level for imprint force. The un-
rectified line current is shown in figure 2a
.
With minimum delay, the print force is maximum ( figure 2b ) . The lightest image is
printed when the delay is longest ( figure 2c ) . A single pulse of AC line current drives the
solenoid coil. The current is controlled by a Silicon Controlled Rectifier (SCR).
The solid state switching design totally eliminates contact arcing and also allows a
much higher current than is practical with a trigger switch mechanism.
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