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High Speed Movement from Normal Speed (Tab or Skip
Operation)
Between printing operations on 40 and 80 cps printers,
the print head can be moved at high speed. The figure
below shows the carrier driver advance pulses for left to
right operation at high speed. The timings are the same
in either direction.
High-Speed Movement from Normal Speed (Tab or Skip Operation)
for 40 cps and 80 cps Printers
Moving Left to Right • • • • • •
High-speed advance must stop at
least 5 characters prior to printing.,
I
Start of high-speed sequence
~
must begin at least 10 char-
acter spaces before
printing.~.
_
II
II
Up-to-speed Advances (2.15 ms) High Speed _ _
-.~I.~
Printing speed
~
.
~
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(3.27 ms)
l...t
~2.6ms
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I
I
I
3.0 ms
-..J
t-+-
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I
3.27ms~
1
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1
1
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A l~·""L....~I-- . . . . . . ----~ . . . . ~---J)
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Carrier
A 1
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Drivers
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B
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B
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Print Wire Timing
The figure shows dots being printed from right to left
and left to right at 40 cps, 80 cps, and 120 cps. If the
print head is moving to the right, the dots will be
printed to the right of the position where the print
emitter pulse occurred. To print to the left on the next
line and align the dots vertically, or to overprint to the
left on the same line on 40 and 80 cps printers, it is
necessary to use the first print emitter pulse that occurs
to the right of the position where the original pulse
occurred. When printing at 120 cps, it is necessary to
use the second print emitter pulse to the right.
On the 40 cps and 80 cps printers, a time delay is
needed between the leading edge of the print emitter
pulse and the start of the print wire pulse.
,
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Theory,
Features
,
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Theory
5256 M I M
4-31
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