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The condition of the print heads directly affects the quality of printed models.
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 4-51.)
• There are noticeable grooves in the surface of printed models.
• Visual inspection of the head reveals that its surface is damaged—peeling
or bubbles in the nozzle area.
• The printer interface displays a warning or malfunction message relating
to a print head—
❒
Head Heater temperature timeout
❒
Head Heater thermistor open
❒
Head Heater thermistor short
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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.
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.
B. Preparing the print block for head replacement.
This is done automatically when you run the wizard.
C.
Removing the defective print head
.
D.
Installing a new print head
.
E. Optimizing the print heads (done automatically by the wizard).
F.
Performing head alignment
.