67
Phenomenon
cause
Countermeasure
page
1.Thread
dropped
when
sewing
。
①
needle
skipped
at
begging
running
。
②
upper
thread
too
short
after
trimming
③
bottom
thread
too
short
。
④
first
stitch
upper
thread
tension
is
too
high
。
⑤
thread
catch
force
instable
（
elastic
fabric,
coarse
thread
,thick
thread
）
⑥
first
stitch
space
is
too
short
。
○
leave
space
between
machine
needle
and
hook
to
0.05
‐
0.1mm
。
○
set
soft
start
at
beginning
running
。
○
adjust
second
thread
tensioner
tension
。
○
to
make
bigger
bounce
of
thread
take
‐
up
spring
or
put
down
first
thread
tensioner
tension
。
○
put
down
bottom
thread
tension
。
○
increase
space
between
needle
hole
and
fixed
knife
。
○
put
down
first
stitch
tension
。
○
slow
down
start
running
speed
to
about
（
600~1000rpm
）
○
increase
catch
thread
stitch
to
3~4
。
○
increase
first
stitch
space
。
○
put
down
first
stitch
upper
thread
tension
。
33
38
16
15
34
2.Thread
easy
to
broken
even
polyester
thread
①
Check
damage
of
hook
and
drive
。
②
Check
damage
of
needle
hole
guide
。
③
Machine
needle
touch
presser
foot
。
④
Thread
end
enters
to
the
groove
of
big
hook
。
⑤
Upper
thread
tension
too
high
。
⑥
Too
big
bounce
of
thread
take
‐
up
spring
。
○
remove
and
made
grinding
。
○
use
file
or
replace
。
○
adjust
presser
foot
position
。
○
remove
middle
hook
make
cleaning
。
○
take
down
upper
thread
tension
。
○
take
down
the
thread
take
‐
up
spring
bounce
。
○
use
silicon
oil
。
33
15
16
14
10.Causes
and
countermeasure
for
the
fault
at
sewing
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 ...
