Thermal Head Adjustment - ISHIDA BC-300 Service Manual

Chapter 5. Thermal Head

5.3 THERMAL HEAD ADJUSTMENT

If the printing surface of the thermal head and the top line of the print roller are not properly aligned, then
print quality across the width of the label will be poor.
First, print a test label, and if the clarity of the printed characters is not satisfactory, perform adjustment
according to the following procedure.
1) Loosen by 1/4 turn the two thermal head
attachment screws.
2) Manually adjust the position of the thermal
head so that the top line of the roller and
the thermal head print surface are aligned.
Print out another test label, and note the
print density. If not satisfactory, adjust the
position of the thermal head, then print
another label. Repeat until print density is
correct.
After adjustment, retighten the two
attachment screws.
Note: Thermal head is usually mounted flush
and parallel with the front edge of the mounting
plate.
CAUTION!
• Avoid touching the surface of the head. If touched, the surface should be wiped clean with a specialized
head cleaner formula.
• Before adjusting, first lower the print density. This will facilitate adjustment.
3) Set the thermal head resistance value.
Note:
For setting method, refer to Chapter S5.2, Section 3, step C03-01.
4) Perform a label printing test.
Note:
For test method, refer to Chapter S5.2, Section 3, step C03-03.
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BC-3000 • Service Manual • Rev. 1