– 16 –
7. adjusting the thread tension /
线张力的调节
Adjust the thread tension with the following thread tension
nuts.
1
Needle thread tension nut
2
Top covering thread tension nut
3
Looper thread tension nut
Turn clockwise to increase the thread tension.
Turn counterclockwise to decrease the thread tension.
B
= Decrease /
拧紧
A
= Increase /
缩短
调节线张力时请用以下零件进行调节。
1
线张力器旋钮
2
上装饰线张力器旋钮
3
弯针线张力器旋钮
向右转动之后，紧线力变强。
向左转动之后，紧线力变弱。
^
. ADJUSTING THE SEWING MACHINE /
缝纫机的调整
1) Loosen setscrews
1
and adjust so that the distance
from the center of the setscrew on the upper side to
the bottom end of the thread hole is 10 mm. Then
tighten setscrews
1
to fix the thread guide.
2) Loosen setscrew
2
and adjust the position from the
center of screws
1
to the center of needle thread
guide rod to the extreme right position (43 mm). Then
tighten screw
2
to fix the thread guide rod.
1. adjusting the silicon container thread guide /
冷却器导线器的调整
Extreme right position /
最右位置
(43 mm)
10 mm
2 1
1） 拧松固定螺丝
1
，把上侧固定螺丝中心到线孔中心
的距离调整为 10mm，然后拧紧固定螺丝
1
。
2） 拧松固定螺丝
2
，把螺丝
1
的中心到机线导线杆中
心的距离调节到最右位置（43mm），然后用螺丝
2
固定。
3) Loosen setscrews
3
and adjust so that the heights
of the respective needle thread guide rods are the
dimensions as shown in the illustration. Then tighten
screws
3
to fix the thread guide rods.
3） 拧松固定螺丝
3
，把各导线杆高度调整为图示的尺
寸，然后用固定螺丝
3
进行固定。
a
B
c
3
Extreme right position /
最右位置
WarNING :
to protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
注意 :
为了防止突然起动造成人身事故，请关掉电源，确认马达确实停止转动后再进行操作。
a
B
c
Adjustment value /
调整值
13mm
16mm
19mm
1
2
3
A
B
– 1 –
!
. sPEcIFIcatIoNs
Model name
Semi-dry head high-speed, small cylinder-bed coverstitch machine
Model
MF-7200D series
Stitch type
ISO standard 406, 407, 602, and 605
Example of application
Hemming and covering for knits and general knitted fabrics
Max. speed of stitch
Max. 4,000 sti/min (at the time of intermittent operation)
Needle gauge
3-needle ... 5.6 mm and 6.4 mm
2-needle ... 3.2 mm, 4.0 mm and 4.8 mm
Differential feed ratio
1 : 0.8 to 1 : 1.8 (stitch length : less than 3.2 mm)
Micro-differential feed adjustment mechanism is provided. (Micro-adjustment)
Stitch length
1.4 mm to 3.2 mm (can be adjusted up to 4.2 mm)
Needle
UY128GAS #9S to #12S (standard #10S)
Needle bar stroke
31mm
Dimensions
(Height) 450 x (Width) 444 x (Length) 285
Weight
42 kg
Lift of presser foot
6 mm (needle gauge : 5.6 mm without top covering), and 5 mm (with top covering)
Micro-lifter mechanism is provided.
Feed adjustment method
Main feed ... dial type stitch pitch adjustment method
Differential feed ... lever adjustment method (micro-adjustment mechanism is provided.)
Looper mechanism
Spherical rod drive method
Lubricating system
Forced lubrication method by gear pump
Lubricating oil
JUKI MACHINE OIL 18
Oil reservoir capacity
Oil gauge lower line : 600 cc to upper line : 900 cc
Installation
Top mount type, Semi-submerged type
Noise
- Equivalent continuous emission sound pressure level (L
pA
) at the workstation :
A-weighted value of 80.5 dB; (Includes K
pA
= 2.5 dB); according to ISO 10821- C.6.2
-ISO 11204 GR2 at 4,000 sti/min.
- Sound power level (L
WA
) ;
A-weighted value of 86.0 dB; (Includes K
WA
= 2.5 dB); according to ISO 10821- C.6.2
-ISO 3744 GR2 at 4,000 sti/min.
