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4.5.2 Functional Components (285 Ipm)
Type Belt Transducer
The type belt transducer detects the raised
timing marks on the type belt. Thses marks are
converted to emitter pulses in the transducer and
sent to the control card. The control card uses
these pulses to generate the home pulse, the
subscan pulses, and the belt up-to-speed signal.
The home pulse and subscan pulses are used to
synchronize the mechanical and electrical por-
tions of the print operation. The belt up-to-
speed signal is sent to the attachment to indicate
that the belt is up to operating speed.
Type Belt
Drive Motor
Printer
I
Attachment
I
Detect
Home
I
"----_---------"1
C k
t
S
t--~t___i
Detect
Home-
Decode
Print
Subscan
Subscan 1
Missing Timing
Mark
Ribbon
Type Belt
Transducer
Type Belt
(home pu Ise)
~
~~
Emitter
Lead 2
Belt
Emitter
Lead 1
Ipss
Circuits
("-~-----:::--~--+----~-''-------ti ~
~
Subscan 2
Subscan 3
Subscan 4
Subscan 5
(belt) Motor
Print Scan 1
to Speed
I
DQ200
Scan 2
Belt Printer
2851pm
4-85
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