69
phenomenon
causes
countermeasure
page
6.upper
thread
exposed
from
inside
of
fabric
。
①
Upper
thread
tension
not
good
。
②
Lift
structure
of
thread
tension
plate
don’t
move
。
③
Upper
thread
too
long
after
trimmer
。
④
Stitch
is
less
。
⑤
When
sewing
length
is
short
(
thrum
is
exposed
at
backside
of
fabric
。)
⑥
Stitch
is
less
。
○
take
up
upper
thread
tension
。
○
check
second
thread
tension
plate
floating
。
○
take
up
first
thread
tension
。
○
take
off
catch
thread
device
。
○
take
off
catch
thread
device
。
○
use
blind
stitch
style
。
15
15
7.thread
broken
at
trimming
。
①
moving
knife
position
is
not
correct
。
○
adjust
moving
knife
position
。
34
8.upper
thread
tangled
on
thread
clamp
device
。
①
upper
thread
too
long
when
start
sewing
。
○
tighten
first
thread
tensioner
,
adjust
thread
length
to
33~36mm
。
9.machine
thread
length
is
different
。
①
thread
take
‐
up
spring
bounce
is
too
low
。
○
take
up
bounce
of
thread
take
‐
up
spring
。
10.can
not
take
short
the
length
of
machine
thread
。
①
thread
take
‐
up
spring
bounce
is
too
low
。
②
thread
take
‐
up
spring
bounce
is
too
high
。
③
because
thread
take
‐
up
spring
bounce
is
too
low
,
the
movement
is
instable
。
○
take
up
first
thread
tensioner
tension
。
○
take
down
thread
take
‐
up
spring
。
○
take
up
thread
take
‐
up
spring
tension
,
stroke
also
change
to
long
。
11.secon
stitch
bottom
thread
knot
appear
to
the
face
。
①
bobbin
idling
is
big
。
②
bottom
thread
tension
is
low
。
③
first
stitch
upper
thread
tension
is
too
high
。
○
adjust
moving
knife
position
。
○
take
up
bottom
thread
tension
。
○
take
down
first
stitch
upper
thread
tension
。
○
turn
off
thread
catch
device
。
Summary of Contents for HK2900
Page 1: ......
Page 7: ...6 缝纫机机头 布压脚 线架装置 操作盘 电源开关 控制箱 踏板开关 2 各部的名称 1 主机的名称 ...
Page 23: ...22 外部线缆插头上有对应的编号 请仔细查看后对应接插 示意图 5 6 图 5 图 6 10 电缆线的链接 ...
Page 24: ...23 11 马达护罩的安装 把马达护罩 用附属的螺丝安装到缝纫机主体上 12 电线的处理 放倒缝纫机时 请确认机头支杆安装在机台上 在放倒缝纫机的状态 连接电线 如图所 示用线束夹 捆紧 ...
Page 27: ...26 穿过机针的线应留出 4cm 左右 3 上线的穿线方法 4 梭壳的取下插入 1 打开旋梭外罩 2 拨起旋梭壳 的抓脚 取出梭壳 3 插入时 请把梭壳深深插入旋梭轴 并关 闭抓脚 ...
Page 76: ...75 机台台板 ...
Page 93: ...12 2 Operation ...
Page 169: ...88 Table diagram ...
Page 170: ......
Page 194: ...2 4 5 6 7 9 2 3 6 8 1 23 HK2903 专用附件 EXCLUSIVE ACCESSORIE PARTS FOR HK2903 ...