XJ128 and XJ128 Plus Printhead
XJ128 Guide to Operation
Xaar Document no: D031010302 Version A
Page 16
4.2 Printhead mounting
The printhead must be treated with care. The most delicate part of the printhead is the
nozzle plate. Avoid contact with the nozzle plate at all times.
Note that all loads on connectors, tubes and cables should be relieved.
4.2.1 Printhead orientation
There are three primary orientations for mounting the XJ128 printhead, as shown in figure 4.2.
1. With the nozzle line horizontal, and the metal chassis down (XaarJet logo facing up), figure
4.2a.
2. With the printhead firing down (Connector facing up), shown in figure 4.2b.
3. With the nozzle line vertical or close to vertical and ink inlet from beneath. This is the best
orientation for easiest filling of the printhead with ink, as shown in figure 4.2c.
Positions set between the three primary orientations are also achievable, as indicated in figure 4.2.
Figure 4.2 - Printhead orientations
4.2.2 Printhead datum locations
The printhead chassis has three datum references with approximate reference dimensions to the first
firing nozzle in the printhead. These should be used as a guide to aid quick and easy mounting and
alignment of the printhead into appropriate mounting systems.
The mechanical drawing in Appendix D has details of the reference dimensions. The datums are
shown in figure 4.3.
Fig.4.2a
Fig.4.2b
Fig.4.2c
