JUKI MF-7200D User manual

INSTRUCTION MANUAL
MF-7200D/UT42,45

i
CONTENTS
I. SPECIFICATIONS...........................................................................................................1
II.AT THE BEGINNING ......................................................................................................1
III. INSTALLING THE ACCESSORIES.............................................................................2
1. Installing the presser lifting cylinder (UT45) ..................................................................................... 2
2. Installing the air regulator (UT45) ...................................................................................................... 2
3. Installing the presser lifting solenoid (UT42) .................................................................................... 3
4. Installation and setting SC-921 ........................................................................................................... 4
(1) Table-mount type..........................................................................................................................................4
(2) Semi-sunken type.........................................................................................................................................4
(3) Connecting the cords...................................................................................................................................5
(4) Setting procedure of the machine head .....................................................................................................6
(5) Setting the lower stop position of the needle bar .....................................................................................7
(6) Setting of the auto lifter function ................................................................................................................8
IV. AIR PIPING DRAWING (UT45) ....................................................................................9
1. Piping of the thread trimmer device ................................................................................................... 9
2. Adjusting the air regulator................................................................................................................. 10
V. THREADING THE MACHINE HEAD..........................................................................11
1. Standard threading for the machine with automatic thread trimmer .............................................11
VI. ADJUSTING THE LOOPER THREAD TRIMMER MECHANISM...........................12
1. Adjusting the thread trimmer air cylinder (UT45)............................................................................ 12
2. Adjusting the looper thread trimmer solenoid (UT42) ................................................................... 12
VII. ADJUSTING THE THREAD RELEASE MECHANISM ..........................................17
VIII. ADJUSTING THE TOP COVERING THREAD TRIMMER MECHANISM (UT45) ...18
IX. ADJUSTING THE TOP COVERING THREAD TRIMMER MECHANISM (UT42) ..20
X. ADJUSTING THE AIR-BLOW WIPER (UT45)...........................................................21
1. Installing the air-blow wiper .............................................................................................................. 21
2. Adjusting the air-blow wiper ............................................................................................................. 21

– 1 –
I. 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
Di󰀨erential feed ratio 1 : 0.8 to 1 : 1.8 (stitch length : less than 3.2 mm)
Micro-di󰀨erential 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 UT42 : 48kg, UT45 : 44kg
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
Di󰀨erential 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 (LpA) at the workstation :
A-weighted value of 80.0 dB; (Includes KpA = 2.5 dB); according to ISO 10821- C.6.2 -ISO 11204
GR2 at 4,000 sti/min.
II. AT THE BEGINNING
❶
Remove xed band ❶for transportation before setting
up the sewing machine.

– 2 –
III. INSTALLING THE ACCESSORIES
1. Installing the presser lifting cylinder (UT45)
❶
❷
❸
❹,❼
❺
❻
❽
❾
2. Installing the air regulator (UT45)
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 o󰀨 and ascertaining that the motor is at rest.
1 - 2 mm
1) Install presser lifting cylinder asm. ❶to the sewing
machine with screws ❸, washers ❹and spring
washers ❼.
2) Tighten screw ❸in such manner that a clearance of
1 to 2 mm is provided between cap ❾at the top end
of presser lifting cylinder asm. ❶and presser lifting
lever ❷.
If the clearance cannot be adjusted to 1 to 2 mm,
adjust the height of nut ❽and cap ❾to obtain the
correct clearance between the cap and lever.
3) Adjust the height of screw ❺referring to the Instruc-
tion Manual for MF-7200D(VI-16.Adjusting the
presser foot lift), and tighten nut ❻.
4) Stroke of cylinder asm. ❶is 30 mm. Make sure that
presser lifting lever ❷comes in contact with screw
❺within the range of cylinder stroke.
1) Install pressure gauge ❺to regulator main body ❶.
2) Attach joint ❸to air intake port A, and joint ❹to
exhaust port B.
3) Install air regulator main body ❶under the table
with wood screw ❷.
❶
❷
❺
❹
❸
B
A

– 3 –
3. Installing the presser lifting solenoid (UT42)
1) Screw solenoid bracket pin ❶supplied as accesso-
ries in the tap located on the left side of the solenoid
installing section.
2) Adjust solenoid bracket pin ❶to solenoid bracket
pin hole ❸of presser lifting solenoid asm. ❷, and
set the presser lifting solenoid asm. When setting it,
insert the presser lifting solenoid asm. into the pin in
the state that it is twisted on the right-hand side.
3) When it is inserted into the pin, turn the presser lift-
ing solenoid asm. in the reverse direction, and x it
with screw ❹and washer ❺. Then install it on the
machine head with screw ❻, washer ❼and spring
washer ❽.
4) Referring to the Instruction Manual for MF-7200D
(VI-16. Adjusting the presser foot lift), adjust the
height of screw 󱢳, and tighten nut 󱢴.
5) Lower presser lifting lever ❾until it comes in contact
with screw 󱢳. Lower top end section 󱢵of presser
lifting solenoid asm. ❷to the lowest position, and
adjust with screws 󱢶(4 places) so that the clear-
ance between top end section 󱢵and presser lifting
lever ❾is 0 to 0.5 mm.
Sound of solenoid may increase during
using presser lifter. When it increases,
loosen 4 setscrews 󱢶, lower solenoid to the
place where the sound is lessened, and x 4
setscrews 󱢶. When adjusting, conrm that
presser lifting lever ❾comes in contact with
presser height adjustment screw 󱢳.
❶
❾
󱢳,󱢴
❻,❼,❽
0 - 0.5 mm
❹,❺
󱢵
󱢶
❷
❸

– 4 –
4. Installation and setting SC-921
(2) Semi-sunken type
1) Install control box mounting plate ❶on the SC-921 with four screws ❷.
2) Install the aforementioned assembly on backing plate ❹with four screws ❸.
❶
❷
❹
❸
(1) Table-mount type
* The instructions apply to the case the control box is installed on the table of the MF-7200D.
To use any other machine head, install the control box on the table referring to the Instruction Manual for
the main body of the relevant sewing machine.
1) Install control box ❷and sensor bracket ❸ on the table with tting bolt asm. ❶supplied with the unit as
accessories. At this time, insert supplied nuts and washers as shown in the gure so that the control box
and sensor bracket are securely xed.
2) Install the control box (or the one equipped with a small sized motor unit) on the table. Then, install the sew-
ing machine head on the table. (Refer to the Instruction Manual for the sewing machine.)
3) Install the mounting plate on the CP-18 panel with four tapping screws ❹supplied with the unit.
At this time, take care not to allow the cable to be caught under the mounting bracket.
4) Install CP-18 panel ❺and sensor bracket ❸on the table with wood screws ❻.
❶
❶
❷
❸
❻
❻
❺
❹
❻
Convex
washer
Spring
washer Hexagonal
nat

– 5 –
(3) Connecting the cords
3) Connect 14P code ❸coming
from the machine head to con-
nector ❻(CN36).
4) Insert 3P cord ❾coming from
the machine head into connec-
tor 󱢳(CN42).
5) When the optional AK device is
attached, connect 2P connector
❹coming from the AK device to
connector ❼(CN37).
6) Connect connector ❺coming from the motor to connector ❽(CN30) on the circuit board.
7) Insert pedal sensor cable 󱢴into connector 󱢵(CN34).
(Caution) 1. When using the AK device, set whether to use the AK device after conrming how to select the
auto-lifter function. (Refter to “(6) Setting of the auto lifter function” p. 8.)
2. Be sure to securely insert the respective connectors after checking the inserting directions since
all connectors have the inserting directions. (When using a type with lock, insert the connectors
until they go to the lock.) The sewing machine is not actuated unless the connectors are inserted
properly. In addition, not only the problem of error warning or the like occurs, but also the sewing
machine and the control box are damaged.
[Connecting the connector for the operation panel]
The connector for the operation panel is provided.
Paying attention to the orientation of the connector 󱢶,
connect it to connector (CN38) 󱢷located on the circuit
board. After connecting, securely lock the connector.
(Caution) Be sure to turn OFF the power before
connecting the connector.
1) Pass cords ❶of the thread trimming solenoid,
reverse-stitching solenoid, etc. and the cord from
the motor through hole Ain the table to route them
down under the machine table.
2) Loosen screw Bin cover ❷with a screwdriver to
open the cover.
❶ A
❷
B
❼
❹
❺
❽
❸
❻
❾
󱢵󱢳
󱢴
󱢷
󱢶

– 6 –
(Caution) For the operation panel other than CP-18, refer to the Instruction Manual for the operation panel to be
used for the setting procedure of the machine head.
❻
❺❹❸
❻
❺❹❸
❻
❺❹❸
(4) Setting procedure of the machine head
2) The type of machine head can be se-
lected by pressing switch
❺
(
switch
❻
).
* Refer to the "List of machine heads"
on the separate sheet or the Instruc-
tion Manual for the machine head of
your sewing machine for the type of
the machine head.
3) After selecting the type of machine
head, by pressing switch ❸(
switch ❹), the step proceeds to 96
or 94, and the display automatically
changes to the contents of the setting
corresponding with the type of ma-
chine head.
1) Call function setting No. 95.

– 7 –
Fig. 1
C
D
Call function setting No. 122. Check to be
sure that the lower stop position of the nee-
dle bar is as shown in Fig. 1. If not, adjust the
lower stop position of the needle bar properly
using function setting No. 122. (Adjustment
can be made within the range of ±15°).
❻
❺❹❸
(5) Setting the lower stop position of the needle bar

– 8 –
(6) Setting of the auto lifter function
1) Turn ON the power switch with
switch ❺held pressed.
2) "FL ON" is displayed on indicators
Ⓐ
and
Ⓑ
with a blip to make the auto lifter
function e󰀨ective.
3) Turn OFF the power switch, and turn
ON the power switch again to return to
the normal mode.
4) Repeat the operation 1) to 3), and
LED display is turned to (FL OFF).
Then, the function of auto-lifter does
not work.
❻
❺❹❸
❶Ⓑ
Ⓐ
❷❼
FL ON : Auto-lifter device becomes e󰀨ective. Selection of the auto-lifter device of solenoid drive (+33V) or of
air drive (+24V) can be performed with switch ❻.
(Changeover is performed to drive power +33V or +24V of CN37.)
FL OFF : Auto-lifter function does not work. (Similarly, the presser foot is not automatically lifted when pro-
grammed stitching is completed.)
Solenoid drive display (+33V) Air drive display (+24V)
(Caution) 1. To perform re-turning ON of the power, be sure to perform after the time of one second or more has
passed.
(If ON / OFF operation of the power is performed quickly, setting may be not changed over well.)
2. Auto-lifter is not actuated unless this function is properly selected.
3. When “FL ON” is selected without installing the auto-lifter device, starting is momentarily delayed
at the start of sewing. In addition, be sure to select “FL OFF” when the auto-lifter is not installed
since the touch-back switch may not work.
WARNING :
When the solenoid is used with the air drive setting, the solenoid may be burned out. So, do not mistake
the setting.
When the auto-lifter device (AK) is attached, this function makes the function of auto-lifter work.