HRS Hirose IT3, Сборочные инструкции

Страница: 57 / 78

IT3/IT5 Connector System T
IPS FOR
SMT A
SSEMBLY
Document Number:
ETAD-F0458
Revision 3.10
Page
53
of
73
Insufficient Solder Volumes: ca n ha ve two di fferent causes : stencil apertures not filling, or not
releasing
. If solder deposi t volumes a re insuffi cient,
observe stencil apertures
to determine if
problem is due to solder pas te not filling aperture or not releasing from aperture. If, a fter
pri nting, apertures a re relati vel y clean, refer to cha rt ti tled “Apertures Not Filling.” If apertures
show excessive residual solder paste, refer to cha rt titled “Apertures Not Releasing.”
Apertures Not Filling
In
su
ff
ic
ie
n
t
S
o
ld
e
r
V
o
lu
m
e
s
A
p
e
rt
u
re
s
N
o
t
F
il
li
n
g
Possible Cause Suggested Action
Interruption (pause) in printing
raised viscosity of pas te Knead paste 4-10 s trokes before resuming
pri nting. Thoroughl y clean boa rd used for
kneading paste.
Squeegee speed too high or too
low Check print speed
Squeegee pressure too low Adjus t pressure. It should be jus t enough to get
a clean wipe a cross top surfa ce of s tencil .
Not enough paste on s tencil Check pas te bead on stencil – 1–1.5cm
diameter is typi cal
Pas te is too cold Check pas te tempera ture and consul t paste
ma nufacturer’s recommenda tions .
Pas te s ti cking to squeegee Check pas te bead on stencil. 1–1.5cm diameter
is typi cal. Check paste tempera ture
Squeegee damaged or worn Inspect blades and repla ce i f necessary
Apertures Not Releasing
In
su
ff
ic
ie
n
t
S
o
ld
e
r
V
o
lu
m
e
s
A
p
e
rt
u
re
s
N
o
t
R
e
le
a
si
ng
Possible Cause Suggested Action
Interruption (pause) in printing
raised viscosity of pas te Knead paste 4-10 s trokes before resuming
pri nting. Thoroughl y clean boa rd used for
kneading paste.
Residual pas te building up in
apertures Check s tencil cleaning pa rameters , increase
frequency
Pas te is too cold
Check pas te tempera ture and consul t paste
ma nufacturer’s recommenda tions
Squeegee pressure too low Adjus t pressure. It should be jus t enough to
get a clean wipe a cross top surfa ce of stencil.
Nov.1.2022 Copyright 2022 HIROSE ELECTRIC CO., LTD. All Rights Reserved.