Hitachi UX2 Technical Manual page 66

4.3.2.3. Calculation of Conditions that Allow Product Speed Matching
Calculate whether the ink drop use and division factor can meet the conditions that allow product speed
matching, based (1) to (7) below. Perform the calculations below. The lower the ink drop use is, the better the
print quality is. To change the ink drop use, check the print quality.
(1) Set the character width value according to the ink drop use, as listed in the table below.
(2) The maximum value of the print scan frequency is obtained by
the formula 2 according to the width of characters to be printed
and the highest conveyor speed.
Substitute a value for "d" according to the nozzle diameter of your model.
(3) Next, use the formula 3 to check whether the set print speed of the IJ Printer can follow the maximum
value of the print scan frequency obtained by the formula 2.
Excitation frequency (f)
(Number of vertical dots + Character width set
value + 1) x (Denominator of ink drop use)
● When the value obtained by the formula 3 becomes smaller than the maximum value of the print scan
frequency (obtained by the formula 2), the product speed matching will not be performed normally,
and the character width will increase as shown in the figure below.
42
Character width set value
Ink drop use
1/1
Large
1/2
1/3 to 1/16
Small
Normal
[Character width]
setting value
002
001
000
Nozzle diameter
[kHz] (formula 3) > Maximum value of
print scans [kHz]
(Example) When the ink drop use is 1/3,
the denominator is 3.
Increased character width
65 μm
0.33
d