Avery Berkel CX20 SERIES, Service Manual

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9 — Label Formats
9–8 CX20/CX30/CX34 Service Manual
9.2.5 The offset (90 and 180 degree formats only)
Unlike the 0
°
label format, the label start points of the 90
°
and 180
°
formats are
referenced, in the machine’s software, to the right–hand side of the print head –
see Figure 9.3. Consequently, an ’offset’ value has to be added to the Y (90
°
)
and X (180
°
) coordinates to compensate for the difference between print head
and label width.
The print head used on all label machines is approximately 53.5 mm wide. It
has 160 dots across its width at three dots every 1 mm. Therefore, as maximum
label width is 50 mm, this offset will always be required.
The offset value is usually obtained by measurement but can also be calculated
– see Section 25.2.1.
Figure 9.4 Effect of the Offset (90 Degree Label)
Direction of Label Feed
90
°
Label with Offset
Print head (right–hand side)
TEXT THIS W
A
Y
UP
All labels aligned
with print head’s left–
hand side
TEXT THIS W
A
Y
UP
90
°
Label without Offset
Start point (incorrect)
Outline of printed
area (shaded)
Outline of label
Offset
Start point (correct)