Paper End Detection - Intermec 6820 Series User Manual

Paper End Detection

6820 Series 80-Column Printer User's Manual
However, consider the following:
S The top and bottom margins are represented by Area 1, as shown in the
previous illustration. The top margin is defined as the distance between
the top edge of the paper and the first row of printed characters. The
bottom margin is defined as the distance between the last row of printed
characters and the bottom edge of the paper.
S There is a possibility that printing can start within one line below the
perforation and printing could continue beyond the Assured Print Area,
however paper feed precision is only reliable with top and bottom mar-
gins of approximately one inch. Basically, you should consider there are
only 55 lines available for reliable printing.
S The left and right margins are represented by Area 2. For reliable print-
ing, use a margin of at least 0.75 inch at the left and right edges of the
paper.
The Paper End Detection line shown in the previous illustration represents
the point at which the Paper Out sensor detects the bottom edge of the pa-
per.
Area 3 represents the the distance between the the Paper End Detection
position and the bottom edge of the page.
Once the last page of the fanfold paper stack is in the printer, and the print
head has advanced past this Paper End Detection line, printing is no longer
reliable.
Also, once the bottom end of the last page has advanced through the print-
er, past the spring plate along the front of the platen, the paper should not
reverse back through the printer, because the printer could jam and cause
paper feed problems. Design applications to prevent any reverse paper feed
from occurring after the Paper Out sensor has detected the bottom edge of
the paper.
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Chapter 5 Control Code Definitions
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