XJ128 and XJ128 Plus Printhead
XJ128 Guide to Operation
Xaar Document no: D031010302 Version A
Page 41
Individual components should be flushed and dried prior to assembly
Ink supply system should be assembled
System should be flushed with the appropriate Xaar flushing solution, please refer to the
Ink and Printhead User Guide documentation for the appropriate solution
The system should be purged of flushing solution
The system and printhead can now be filled with ink, see section 7.5.2.
7.5.2 Filling the printhead
The XJ128 printhead is supplied having been through a series of printing tests as part
of the manufacture. There will be some residual print test fluid within the printhead. In
some cases, the residual fluid will be incompatible with the ink to be used. In such
cases, the printhead will require additional pre-flushing using the approved flushing
solution and procedures. These will be ink specific and are detailed in the
corresponding Ink and Printhead User Guide.
Filling the printhead for the first time is an important task that
must be achieved minimising the amount of air left in the
printhead and ink supply system. The level of success
achieved from the first filling of the printhead depends on
several factors including the orientation of the printhead and
the controlling the fill rate of the printhead. In the most
common orientation,
‘
down
-shooter
’
, the ink supply tube
should be connected to the printhead, as discussed in
section 4.4. This is the most difficult orientation for reliably
filling the printhead with ink.
Figure 7.4 - Connecting the ink tubing to the XJ128
‘
down-shooter
’
The best orientation for filling the printhead is with the
printhead
‘
on
-edge
’
and with the ink inlet facing down. See
figure 7.5.
Figure 7.5
–
XJ128 printhead
‘
on-edge
’
By controlling the filling process of the printhead for the first time, the performance and reliability of
the printhead will be maximised.
Ink inlet
Ink inlet