5TROUBLESHOOTING_ - 第155页
4.3 Troubleshooting for Placement Errors 4.3 . 2 Symptom - Based Troubleshooting 4.3 . 2.1 Component Placement Marks at Specified Positions on P . C . B . Lands Marks are left , indicating that a component was placed on …
4.3
Troubleshooting
for
Placement
Errors
(
2
)
Machine
-
Based
Factors
Shown
below
are
the
assumable
main
factors
based
on
the
machine
.
When
trouble
occurs
in
some
of
the
components
(
the
components
of
the
same
type
that
have
been
used
in
the
past
actual
production
)
,
check
for
the
factors
described
in
①
through
⑤
•
①
Worn
,
Clogged
,
or
Dirty
Nozzle
②
Nozzle
Up
/
Down
Movement
Error
③
Flow
Rate
of
Broken
Vacuum
and
Performance
Error
④
Improper
Placement
Height
Level
⑤
Imperfect
Holding
Power
for
P
.
C
.
B
.
Positioning
(
3
)
Other
Factors
The
factors
other
than
the
machine
-
based
ones
are
assumed
to
be
the
shape
of
the
component
，
the
condition
of
the
P
.
C
.
B
.
,
or
the
condition
of
cream
solder
or
glue
.
The
factors
are
shown
in
the
table
below
.
Check
each
item
and
take
measures
if
necessary
.
If
no
quick
improvement
can
be
made
due
to
the
condition
of
the
P
.
C
.
B
.
or
cream
solder
，
failures
can
be
avoided
by
slowing
down
the
speed
of
component
placement
or
the
X
/
Y
table
movement
for
component
placement
.
A
foreign
substance
exists
on
the
upper
surface
of
a
component
and
adheres
to
the
vacuum
nozzle
.
Component
Oil
or
mold
lubricant
adheres
to
the
lower
surface
of
a
component
.
Some
P
.
C
.
B
.
’
s
vibrate
during
component
placement
because
the
warpage
is
great
.
P
.
C
.
B
.
Some
RC
.
B
.
’
s
are
fixed
imperfectly
due
to
variations
in
shape
.
Glue
Shortage
of
Applied
Glue
Shortage
of
Applied
Solder
Cream
Solder
Shortage
of
Adhesion
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4.3
Troubleshooting
for
Placement
Errors
4.3
.
2
Symptom
-
Based
Troubleshooting
4.3
.
2.1
Component
Placement
Marks
at
Specified
Positions
on
P
.
C
.
B
.
Lands
Marks
are
left
,
indicating
that
a
component
was
placed
on
the
paste
applied
to
the
specified
positions
on
the
lands
.
START
NG
irty
Vacuum
Filter
or
Defective
Atta
NG
Component
Library
Data
chment
Cleaning
,
Replacement
,
or
Repair
Correction
OK
OK
<
^
Setting
of
P
.
C
^
^
>
NG
Setting
of
Flow
Rate
for
Air
\
Blowing
/
NG
Setting
Correction
OK
OK
NG
Setting
of
Air
Blow
Pipe
NG
Vibration
during
P
.
C
.
B
.
Positioning
Correction
OK
Re
-
Setting
OK
NG
<
C
^
Pa
^
Ad
^
s
^
^
>
-
NG
Replacement
OK
Improvement
OK
)
END
4
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4.3
Troubleshooting
for
Placement
Errors
4.3
.
2.2
No
Component
Placement
Marks
at
Specified
Positions
on
P
.
C
.
B
.
Lands
START
NG
Nozzle
Up
/
Down
Movement
OK
Cleaning
OK
No
Marks
on
Glue
NG
Setting
of
P
.
C
.
B
.
Height
NG
Silicon
Hose
Damage
or
Collision
Correction
OK
Replacement
or
Repair
OK
NG
P
.
C
.
B
.
Height
Data
NG
Correction
Constraint
Loai
of
Top
Block
OK
Setting
OK
NG
Component
Library
Data
NG
Correction
lovement
of
Top
Block
Lever
OK
Correction
OK
NG
Head
Vacuum
NG
Cam
Follower
of
Top
Block
Repair
OK
Replacement
OK
NG
Looseness
of
Head
NG
Linear
Guide
of
\
Head
/
OK
Repair
Replacement
OK
)
END
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