Warning Conditions (Printing Continuously Performed) - Hitachi UX Twin Nozzle Service Manual

6.4 Warning conditions (printing continuously performed)

6.4.1 Excitation V-ref. Review, Excitation V-ref. Review 2
Readjust the excitation setup of nozzle1 and nozzle2.
6.4.2 Viscosity Reading Instability
Perform the viscometer
operation test on the
Circulation system control
screen.
Is it normally measured? *1
(*1): The Viscosity measurement during
IJP operation is conducted every
15minutes just before the ink
replenishment. When the viscosity
values measured are instable, the
ink is replenished by dot counts
but NOT by the
measurement result. If this ink
replenishment by dot counts is
made three times in a row, the
warning of "Viscosity
Instability" will be indicated. After
this warning indication,
viscosity measurement
conducted every
however the ink is replenished by
dot counts until the ink viscosity
returns to a stable condition.
(*2): When you disassemble and clean
or replace the Viscometer, refer
to "4. 12 Troubleshooting when
Fault Occurs in Viscometer".
Excitation V-ref. Review
Resume the operation.
Viscosity Reading
Instability
Yes
viscosity
Reading
the
is
15minutes
Perform viscometer
calibration
Resume the
operation.
Readjust the excitation setup of nozzle1 and nozzle2.
No
Replace the viscometer filter.
Yes
Is it normally measured?
No
Disassemble and clean the
viscometer.
Yes
Is it normally measured?
No
Replace the viscometer.*2
6-65
Excitation V-ref. Review 2
Resume the operation.
Viscosity Reading
Instability
during installation
(calibration)
Re-execute viscometer
calibration (2-3 times).
Does calibration finish
normally?
Yes
Press [OK], then the
coefficient is determined
No