Ink Concentration Control - Hitachi IJ UX Instruction Manual

1.7 Ink concentration control

(1) The ink is automatically controlled to maintain optimum concentration for printing.
(2)If an error occurs in the viscometer which is used to control ink concentration, take care of the following points:
1
There are three types of viscometer errors:
"Inside Temperature Sensor Fault", "Viscometer Reading Instability", and "Viscometer Reading Out of
Range".
2 When a "Inside Temperature Sensor Fault" occurs, the unit will enter the fault stop state.
Re-start is possible by pressing the Close , but the setting will be changed to the state in which ink
concentration control based on the measured result using the viscometer is not performed thereafter.
Once the setting of automatic concentration control is released, every time the power is turned on, the
following message will appear. Cancel the message by pressing the Close and be sure to inform your
nearest local distributor.
No Ink Concentration Control
Solution Contact your local distributor.
When "Viscosity Reading Instability" or "Viscosity Readings Out of Range" occurs, the unit will not
3
enter the fault stop state and printing can be continued. However, you should contact your nearest
local distributor for inspection.
1.8 Gutter cleaning
The IJ printer collects ink not used for printing from the gutter. At the same time, it sucks in atmospheric gas, dust,
and other matter from the air. If these substances are mixed with the ink in the gutter, undissolved
components in the ink or makeup may stick to the gutter. If the system is run for 24 consecutive hours without
automatic cleaning, these components will gradually accumulate in the gutter. This, together with the ink stream
coming into contact with it, may cause such errors as "an error stemming from a dirty head".
1
Clean the gutter and its perimeters with makeup periodically.
2
Perform the procedures descibed in "6.6 Cleaning the Gutter" in Technical Manual, and claen the gutter and the
recovery route.
Should the solution above do not work, contact your nearest distributor.
1-6 ●Ink concentration control
CONFIRMATION
The current settings have made ink concentration control
unavailable.
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No.200