Citizen CT-S4500 User Manual page 76

CAUTION
 The black mark PCS value should be at least 0.90.
 Concerning the accuracy of feeding with black mark detection, allow for an error of ±2 mm
from the reference print position, or for a maximum error of -5% from the value set for the print
length.
 The print area is as shown in the illustration above when black marks are being used.
Make sure to allow for adequate margins.
The printer will perform a page skip operation if the print data runs outside of the print area.
 When pre-printing on black mark paper, print outside of the area detected by the black mark
sensor.
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