Replacing Print Heads - Stratasys J826 User Manual

Stratasys J826 User Guide

Replacing Print Heads

The condition of the print heads directly affects the quality of 3D prints. You
may need to replace a print head if one or more of the following symptoms
occurs:
• The Head Optimization wizard determines that a print head is defective.
(See "Optimizing (Calibrating) Print Heads" on page 4-57.)
• There are noticeable grooves in the surface of 3D prints.
• Visual inspection of the head reveals that its surface is damaged—peeling
• The printer interface displays a warning or malfunction message relating to
Replace print heads only after consulting with an authorized Stratasys
service provider.
The Head Optimization wizard guides you through the procedure of replacing a
print head, and configures printer components to enable you to perform it. Only
replace a print head with the aid of the wizard.
The entire print-head replacement procedure takes about 45 minutes, and
consists of the following phases:
A. Identifying the head(s) needing replacement.
B. Preparing the print block for head replacement.
C.
D.
E. Optimizing the print heads (done automatically by the wizard).
F.
DOC-28000 Rev. I
or bubbles in the nozzle area.
a print head—
❒ Head Heater temperature timeout
❒ Head Heater thermistor open
❒ Head Heater thermistor short
This is normally done by the Head Optimization wizard. Otherwise,
evidence of physical damage to the head surface or a malfunction message
indicates which head needs replacing.
This is done automatically when you run the wizard.
Removing the defective print
Installing a new print head.
Performing head alignment.
4 Operating and Maintaining the Printer
head.
4-66