- Ultra Electronics Printers Instructions

3461/07/01 ISSUE 2 PRINTHEAD INSTALLATION & COMMISSIONING SPEC. DCR No. 26106
VIII
7. And finally.....
If your new thermal printhead fails to produce a good test image after following the above
steps then please contact your supplier.
Too Positive
Dark patches stressing
out from the rear edge
of the green square
(watermarking). These
patches have many
jagged edges. Plus
possibly a dark patch at
the front of the grey
square,.
SOLUTION: Decrease
head angle by 1 or 2
degrees.
Correct Head Angle
Uniform density across the whole of the grey
square, with no marks or defects in the green
square.
Too Negative
Front or most of the grey
square is pale and washed
out. Density can suddenly
increase in the last third of
the square.
SOLUTION: Increase head
angle by 1 or 2 degrees.