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NEPTUNE HQ
Horizontal Calibration
Horizontal Calibration checks the bi-directional, left, and right alignment and corrects it by adding or
subtracting the correction value from the default set value. It has to be performed for each print mode
(
360 and 720 dpi
) whichever is required. Let’s discuss each type of horizontal test one b
y one.
Bi-direction Calibration
Bi-
directional calibration is performed to achieve dot placement accuracy between the “Left to Right” and
“Right to Left” print sweeps. If the bi
-direction offset value is correct, the Left to Right test print would
align accurately with the Right to Left test print at
“0”
position. In case of error in the Bi-Direction offset,
the Left to Right and Right to Left print would align at some other point on the scale.
The Bi-direction Calibration result is shown in the image below:
Fig 45: The Bi-Direction Calibration Output
Based on the above figure, you can notice that the Bi-direction calibration is good at
“0”
position. The
correction value is
“0”
which means you need not to correct the bi-direction value. Sometimes, the
correction value can either positive or negative. If the correction value is positive, then you need to add
it in the current bi-direction adjust value or subtract the same if negative.
