Updating Excitation V-Ref - Hitachi UX2 Technical Manual

5.10. Updating Excitation V-ref.

This section describes updating excitation V-ref.
(1) Overview
● The range of excitation V-ref. values is 0 to 19. The ink drop state varies depending on each setting.
● You need to input the optimum excitation V-ref. value to maintain good printing quality.
● Perform the nozzle test. The center value of the printing good range is set as the optimum excitation V-ref.
value.
(Example)
● The ambient temperature at the update of the excitation V-ref. value is stored as the reference ambient
temperature. If the difference between the ambient temperature and the reference ambient temperature
exceeds a certain value while the unit is in use, the [Excitation V-ref. Review] warning will occur. In this
case, readjust the excitation V-ref. value.
(2) Procedure
● Select the optimum excitation V-ref. value from the results of test printing for each set value, and enter it
on the screen operation. Use the procedure below to perform the operation.
1
Press Excitation V update (Nozzle test) on the third screen of the [Setting] screen.
The [Excitation V update] screen appears. The layout of the screen is shown below.
[Excitation V-ref.]
Enter the set value you want to use for printing. (The range
of set values is 00 to 19.)
You can touch the [+] and [-] keys or the number to change
the value in the setting item to a desired value.
Ambient temperature for the
current set value
98
When good printing is obtained within the range of the excitation V-ref. values 5 to 15 in a
nozzle test, the optimum excitation V-ref. value is 10, the center value of the range.
[Print data]
Data to be displayed: Currently set print description and
print conditions
"For test": Print description below
- Line: 1 line
- Dot matrix: 12 x 16 dots
- Inter-char. space: 1
- Character height: 99
- Character width: 5
- Ink drop use: 1/3
- Print character description : ■■nn123ABC
Layout of [Excitation V update] screen
[Automatic update]
After printing in one setting, the excitation V-ref. values
below can be automatically switched.
No: The set value remains unchanged.
Dec.: The set value automatically decreases for each
printing.
Inc.: The set value automatically increases for each
printing.
[Increment]
The amount of change width to be automatically updated
is set.
[Print timing]
Button input: Press [Start printing] on the screen operation to start
printing.
Sensor: Printing starts at the timing of a print target detector signal.
("nn" represents the excitation V-ref. value.)