
Integrated Valve
Section 4: Installation
5760-107 Operations Manual Rev C
Page 27 of 86
Checking Ink Pressure
Variations in ink pressure produce different
dot sizes; the higher the pressure, the
larger the dot. However, over-pressurizing a
print head can result in leakage, or cause
ink to shoot across the conveyor. Under-
pressurizing can cause ink to drip from the
front plate while printing; the print head may
also take a long time to print all the dots at
morning startup.
Connect the ink pressure gauge with its
female quick-disconnect to the male discon-
nect on the print head. The needle on the
gauge will reflect the ink pressure at the
print head. See the chart below for the nor-
mal operating pressure for your print head.
CAUTION:
Observe the following precautions while using and
cleaning the ink pressure gauge:
1. Do not probe into the pressure gauge with objects when
cleaning. Use the appropriate conditioner and brush.
2. Pressure measurements are relative to the height from which
they are measured. When measuring print head pressure, the
gauge must be at the same height as the print head.
3. Do not leave the gauge hanging from the print head connec-
tion for very long. Its weight will fatigue the fitting, eventually
breaking it off and allowing pressurized ink to flow freely from
the head.
4. The gauge should be calibrated periodically for accuracy. This
should be done at least once per year, or whenever it has
been dropped.
5. If the ink pressure at the print head is not correct, follow the
steps below.
Print Head
PSIG (±0.5)
9 Dot, 1/2"
5
9 Dot, 7/8"
6
18 Dot, 1"
8
18 Dot, 2"
8
Pressure
Gauge
Regulator
!
Summary of Contents for Diagraph IJ3000
Page 2: ......
Page 8: ...Integrated Valve Page iv of iv 5760 107 Operations Manual Rev C ...
Page 10: ...Integrated Valve Section 1 Introduction Page 2 of 86 5760 107 Operations Manual Rev C ...
Page 12: ...Integrated Valve Section 2 Safety Page 4 of 86 5760 107 Operations Manual Rev C ...
Page 22: ...Integrated Valve Section 3 System Components Page 14 of 86 5760 107 Operations Manual Rev C ...
Page 60: ...Integrated Valve Section 7 Troubleshooting Page 52 of 86 5760 107 Operations Manual Rev C ...
Page 76: ...Integrated Valve Appendix C Parts and Supplies Page 68 of 86 5760 107 Operations Manual Rev C ...