Datamax-O'Neil I-Class Linear Scanner User Guide - Manual (Page 7)

5
Label Layout
As mentioned earlier, to be properly recognized the printed bar codes printed must be a supported
symbology, have a narrow bar resolution of no less than 10 mils, and have proper quiet zone areas.
Another important factor concerns label formats with multiple-up bar codes: If printing multiple-up bar
codes in ordered columns where the same encoded information exists in each bar code (see below), there
must be at least ¼ inch white space in the rows between these symbologies.
104 104 104
104 104 104
1/4 inch (6.5 mm)
Row
Column
Finally, when considering your layout, if you are going to print bar codes at high speeds that are 1/8 inch
or less, consult the following table to ensure that the Scanner will be able to properly detect the codes.
Minimum Bar Code Height Maximum Allowable Print Speed
1/16 inch (1.5 mm) 8 IPS (inches per second)
1/8 inch (3 mm) 10 IPS
 Note: In addition to the conditions above, some special c onsiderations should be made if you are scanning small
labels.
(1) In some cases, the printer must back-up to scan the bar code because the small label size will not allow
reading until it emerges from the printer.
(2) If possible, arrange the layout so that the bar code(s) appear in the first portion on the label (as the label
exits the printer).
(3) If the barcode is large enough, or if the barcode is positioned to emerge from under the printhead before
next label starts to print, a reduction of print speed may actually improve throughput by avoiding label back-
up repositioning.
Maintenance
No scheduled maintenance is required for the
Scanner. Should it require cleaning, use a water
dampened lens (or lint free) cloth and carefully
clean the Window (see illustration). Avoid
excessive moisture that could penetrate the housing
and obscure the window. While the use of cleaning
fluids other than water are not recommended, if
necessary a neutral detergent or ethanol would be
preferred; never use bleach at any strength because
damage to the painted case and/or window can
result.
Window