IT3/IT5
Connector System
T
IPS FOR
SMT
A
SSEMBLY
Document Number:
ETAD-F0458
Revision 3.10
Page
52
of
73
5.
Inspect the squeegee blades
for the proper
angle
(usually 45 degrees ), dama ge or
nicks
on the bla de’s edge
, or
dried paste
s tuck to the blades or holders .
Check pressure
balance
on blades .
If no issues a re found during review of the printer’s setup, please refer to the following specifi c
guides for additional troubleshooting assistance.
Solder Paste Bridges:
Are often referred to as
“wet bridges”
and occur when the normal gaps
between two or more a dja cent pads is bri dged by s tra y solder paste.
S
o
ld
e
r
B
ri
d
g
es
o
r
S
tr
in
g
s
Possible Cause
Suggested Action
Poor gasketing
See section on gasketing below
Residual pas te from previ ous
pri nt(s )
Check s tencil cleaning pa rameters , increase
cleaning frequency
Sepa rati on Speed
(too fast or too slow)
Increase or decrease separa tion speed
(i ndi vidual solder pastes ha ve unique opti mums)
Squeegee pressure too high
Decrease pressure. It should be jus t enough to
get a clean wipe a cross top surfa ce of stencil
Too much paste on s tencil
Check pas te bead on stencil – 1–1.5cm diameter
is typi cal
Pas te is too wa rm
Check pas te tempera ture and consul t paste
ma nufacturer’s recommenda tions
Print Definition:
is considered good i f all
deposits are
of
uniform
shape and size
,
with well
defined edges
a nd
flat
or slightl y dome-shaped
tops.
P
o
o
r
P
ri
n
t
D
e
fi
n
it
io
n
(“
D
o
g
E
a
rs
”
o
r
P
e
a
ks
)
Possible Cause
Suggested Action
Poor gasketing
See section on gasketing below
Sepa rati on Speed (too fas t or
too slow)
Increase or decrease separa tion speed
(i ndi vidual solder pastes ha ve unique opti mums)
Residual pas te from previ ous
pri nt(s )
Check s tencil cleaning pa rameters , increase
cleaning frequency
Misalignment
See section on alignment bel ow
Squeegee pressure too high
or too low
Adjus t pressure. It should be jus t enough to get
a clean wipe a cross top surfa ce of s tencil .
Pas te is too wa rm
Check pas te tempera ture and consul t paste
ma nufacturer’s recommenda tions
Nov.1.2022 Copyright 2022 HIROSE ELECTRIC CO., LTD. All Rights Reserved.
