XJ128 and XJ128 Plus Printhead
XJ128 Guide to Operation
Xaar Document no: D031010302 Version A
Page 19
The operational temperature of the printhead will be controlled by several factors:
Thermal paths arising from the way the printhead is mounted (heat sinking)
Thermal paths in the application (mechanical and liquid)
The type of ink used
Internal heat generation (electronics etc)
Environmental heat dissipation
The maximum heat dissipation to be removed from the XJ128 printhead is 6 Watts. A typical value
for heat dissipation to be removed from the XJ128 printhead is 1 to 2 Watts, in normal operation.
The most effective way of removing heat from the printhead is through the thermally
conductive aluminium chassis. This should be used to
‘
cool
’
the printheads during
operation by removing heat generated by the printheads through a mechanical interface
with a heat sink.
4.4 Ink connection
Ensure that clean ink connectors are used. Ink connections to the printhead should be
prompt to reduce risk of contamination. Only use approved inks and associated
cleaning solutions available from Xaar.
Figure 4.6
–
XJ128 ink inlet
The ink connection to the printhead is through the ink inlet port as shown in figure 4.6. Push a 3.0mm
ID tube over the ink inlet port. A flexible-type of tubing should be used, as an interference fit is
required. The ink inlet port has an OD of 3.1mm. This is also shown on the mechanical drawing in
Appendix D. A 4mm OD/3mm ID tubing is recommended when supplying ink to the XJ128 printhead.
Ink inlet