DataCard CP60 - Miscellaneous

2-6 Theory of Operation
Miscellaneous
Name Function
Smart Card Solenoid
The smart card solenoid retracts the smart card rocker downward
so the contacts touch the card. When relaxed, a return spring lifts
the rocker and contacts away from the card.
Duplex Clutch
The duplex clutch controls whether the duplex motor operates the
drive rollers or rotates the whole flipper assembly. The clutch
contains two concentric axes that are free to rotate
independently when the clutch is relaxed. When the clutch is
active, a magnetic field pulls the two axes together and friction
forces the two to rotate in unison. Because the clutch is engaged
magnetically, the rotation of either axis is independent from the
body of the clutch.
Operation: The duplex motor rotates the outer axis (large gear),
which is coupled to the two duplex drive rollers. The flipper
assembly is coupled to the inner axis. When the clutch is relaxed,
the outer axis (gear) rotates independently from the flipper
assembly, and this causes the drive rollers to rotate. When the
clutch is engaged, the whole flipper assembly rotates in unison
with the large gear, which keeps the drive rollers from rotating.
RFID Antenna
The RFID antenna circuit board is a simple loop antenna that
communicates with the supplies ID chip in the ribbon supply spool.
The bi-directional communication method is similar to
Non-
Contact Smart Cards (p. 2-32) using load-modulation, although
the specific details may vary.
Duplex Interface
Board
The duplex interface board contains a step motor driver for the
duplex motor, and a 24-volt driver circuit for the clutch. The sensor
signals are passed through directly from the main control board.
Magnetic Stripe
Daughter Board
There are two types of magnetic stripe daughter boards: 3-track
and single track. The circuit board controls the magnetic stripe
head and provides an interface for the optical encoder. The
optical encoder data is passed back to the main control board
without modification.
Smart Card Daughter
Board
The smart card daughter board provides a communication
interface between the application computer and the smart card.
Most of the communication aspects and the data transfer are
controlled by an external software application, and are
transparent to the printer. The daughter board also provides a
connection to control the smart card solenoid.