EBS Ink-Jet Systems EBS-6200, User Manual

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EBS-6200
Printer User's Manual
Chapter 4 - Operating the Printer
#1.0
27
20091020
4.3. Print Head Status
The print head operates in the right way, if the ink jet is properly broken into d
properly charged and a flow of unused ink droplets falls into the gutter gene
2
n the print head
ters and are shown
ind
A sample head statu
roplets, the droplets are
rating the correct
measurement phasing signal . Therefore vital parameters are measured withi
. The settings o e form the so called print head status continuously f these param
on the terminal display in the printer status w ow.
s is given below.
Graphic display
Printer status window
Head status block
Fig. 4.3.1.
The characters of the status block have the following meaning:
´
The first digit on the first line indicates the quality of phasing - it can vary between 2 and 6 (with
4 being the optimum). Frequent fluctuations of the quantity from the optimum indicate that the unit
is tuned improperly. A question mark
?
which may appear at this position from time to time means
erroneous measurement of phasing. If the mark is displayed frequently or continuously, this
means that the unit is not tuned properly, especially within the head, and it may lead to a phasing
error and an alarm.
´
The second digit on the first line (one character) indicates the head operation mode. The head
can be in one of the following four modes:
r
(
restart
) head operation has been restarted (no phasing, printing disabled, the READY
lamp on the internal panel is off),
s
(
stop
) the head is ready to start printing (phase and ink viscosity are measured, the
READY lamp on the internal panel generates steady light),
p
(
print
) the head performs the operation of printing as the result of the START PRINT or
PRINT SWITCH commands (high voltage is turned on, phase and viscosity are
measured, the READY lamp and the HV lamp on the internal and external panel generate
steady light),
v
(
service
) the head is in the service mode and enables the user to perform service
operations (phase and ink viscosity are measured, no alarm is indicated if a phasing error
occurs).
´
The third digit on the first line (one character) indicates the number of the best phase determined
during the phasing process. It can vary between 0 and 7 . Variations in magnitude every now and
again at few-second intervals indicate that ink parameters vary too quickly (and these are allowed
only for a short period after the unit has been switched on). Changes by ±1 are normal for this
parameter.
´
Three positions on the second line are used to show ink viscosity and other information. The
viscosity is given in relation to its rated value of +00 . Positive numbers indicate that viscosity
levels are higher than the rated value, with negative numbers the viscosity is smaller than the
rated value. The correct value ranges between
+15 and -05 . Two other characters such as > ( < )
can be displayed at the position in emergency cases: when ink viscosity rises (drops) above
(below) the value of 99.
The following messages may also occur on the second line:
Per
phasing error
.
2
Phasing - automatic process of controlling the charging of ink droplets. The breaking point at which a continuous ink jet
breaks into droplets varies slightly with time. Therefore the control system needs to update time relations between
breaking of the ink jet into droplets on an on-going basis. the charging and