Operating & Maintaining the Connex500/350 3-D Printer
7–40
DOC-13000 Rev. E
Replacing
Print Heads
The
condition
of
the
heads
directly
affects
the
quality
of
printed
models.
You
need
to
replace
a
head
if
one
or
more
of
the
following
symptoms
occurs:
•
The
Head
Optimization
wizard
determines
that
one
or
more
heads
are
defective.
(See
“Calibrating
Heads”
on
page 34.)
•
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
Connex
interface
displays
a
warning
or
malfunction
message
relating
to
a
head—
Head
Heater
temperature
timeout
Head
Heater
thermistor
open
Head
Heater
thermistor
short
The
Head
Optimization
wizard
guides
you
through
the
procedure
of
replacing
a
head,
and
adjusts
components
of
the
Connex
printer
to
enable
you
to
perform
it.
Only
replace
a
head
with
the
aid
of
the
wizard.
The
procedure
takes
75—90
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
block
for
head
replacement.
This
is
done
automatically
when
you
run
the
wizard.
C. Removing
the
defective
head.
D. Installing
a
new
head.
E. Optimizing
the
heads
(done
automatically
by
the
wizard).
F. Performing
head
alignment.
To replace a print head:
1. Prepare—
•
replacement
head(s)
•
isopropanol
(IPA—isopropyl
alcohol)
or
ethanol
(ethyl
alcohol)
•
disposable
safety
gloves
(included
in
the
head
replacement
kit)
•
an
Objet
‐
supplied
cleaning
cloth
or
equivalent
•
a
flat
‐
head
screwdriver
(5
mm)
•
the
scale
supplied
by
Objet
for
use
in
the
Weight
Test
Note:
Make sure that you have these items before running the wizard.
2. Start
the
Head
Optimization
wizard
from
the
Options
menu
of
the
printer
interface
(see
figure 7
‐
48
on
page 35).
3. In
the
opening
wizard
screen,
click
Next
to
begin.
Replacing print heads is expensive. Replace them only after consulting with
an Objet-authorized customer-support engineer.
All manuals and user guides at all-guides.com
