JUKI AC-172N-1790AN User manual

INSTRUCTION MANUAL
AC-172N-1790AN

i
CONTENTS
I. MACHINE OPERATION............................................................................... 1
1. GENERAL...................................................................................................................... 1
1-1. Features ..........................................................................................................................................1
1-2. Conguration of the main parts....................................................................................................2
1-3. Operating precautions...................................................................................................................3
2. SPECIFICATIONS ......................................................................................................... 3
3. INSTALLATION.............................................................................................................. 4
3-1. Removing the machine head xing plate ....................................................................................4
3-2. Connecting the power supply.......................................................................................................5
3-3. Installing the air hose ....................................................................................................................5
3-4. Lubrication......................................................................................................................................6
3-5. Installing the panel.........................................................................................................................8
3-6. Installing the eye protection cover............................................................................................... 9
3-7. Installing the thread guide ............................................................................................................9
3-8. Installing the thread stand ............................................................................................................9
3-9. Installing the marking light .........................................................................................................10
3-10. Adjusting the marking light.......................................................................................................12
3-11. Installation and adjustment of the material edge detecting sensor (asm.) .......................... 13
3-12. Assembly and adjustment of the auxiliary clamp................................................................... 18
4. OPERATION AND ADJUSTMENT .............................................................................. 26
4-1. Operating switches and adjusting pneumatic components .................................................... 26
4-2. Operation of the sewing machine...............................................................................................33
4-3. Adjusting the seam allowance....................................................................................................37
4-4. Adjusting the carriage clamp......................................................................................................38
4-5. Adjusting the sub clamp ............................................................................................................. 39
4-6. Adjusting the stacking board of the stacker ............................................................................. 41
4-7. Preventive measure against the material dropping during stacking...................................... 41
5. OPERATION ................................................................................................................ 42
II. OPERATION SECTION (WITH REGARD TO THE PANEL) .............................................44
1. WHEN USING IP-420 .................................................................................................. 44
1-1. Name of each section of IP-420 ..................................................................................................44
1-2. Buttons to be used in common ..................................................................................................45
1-3. Basic operation of the sewing machine.....................................................................................46
1-4. LCD display section under AC mode ......................................................................................... 47
1-5. Performing AC pattern selection ................................................................................................ 52
1-6. Performing re-sewing ..................................................................................................................53
1-7. Winding bobbin thread................................................................................................................ 55
1-8. Using counter............................................................................................................................... 56
1-9. Performing new register of AC pattern. ..................................................................................... 59
1-10. Copying AC pattern ................................................................................................................... 65
1-11. Changeover of men's and ladies' wear. ................................................................................... 66
1-12. Naming the pattern ....................................................................................................................67
1-13. Changing over the pair stack.................................................................................................... 68

ii
2. OPERATION OF THE SINGLE UNIT OF SEWING MACHINE AND SETTING
PROCEDURE (LBH MODE) ..................................................................................... 69
2-1. LCD display section at the time of independent sewing.......................................................... 69
2-2. Performing LBH pattern No. selection....................................................................................... 73
2-3. Performing sewing shape selection........................................................................................... 74
2-4. Performing re-sewing under LBH mode ....................................................................................75
2-5. Performing new register of LBH pattern....................................................................................78
2-6. Sewing shape list......................................................................................................................... 80
2-7. Changing sewing data................................................................................................................. 81
2-8. Inputting the work clamp type ....................................................................................................89
2-9. Changing needle thread tension ................................................................................................91
2-10. Setting procedure of sewing data with/without edit............................................................... 93
2-11. Copying LBH sewing pattern .................................................................................................... 94
2-12. Registering sewing data to customize button......................................................................... 96
2-13. Changing sewing mode............................................................................................................. 98
2-14. LCD display section at the time of continuous stitching....................................................... 99
2-15. Performing LBH continuous stitching ...................................................................................103
2-16. Explanation of plural motions of knife................................................................................... 107
3. CHANGING MEMORY SWITCH DATA ..................................................................... 110
3-1. Changing procedure of memory switch data.......................................................................... 110
3-2. Memory switch data list............................................................................................................. 112
4. ERROR CODE LIST .................................................................................................. 117
5. MESSAGE LIST......................................................................................................... 127
6. USING COMMUNICATION FUNCTION .................................................................... 130
6-1. Handling possible data.............................................................................................................. 130
6-2. Performing communication by using the media..................................................................... 131
6-3. Performing communication by using USB.............................................................................. 134
6-4. Take-in of the data......................................................................................................................134
7. PERFORMING FORMATTING OF THE MEDIA........................................................ 137
8. PERFORMING KEY LOCK ....................................................................................... 138
9. DISPLAYING VERSION INFORMATION .................................................................. 139
10. USING CHECK PROGRAM .................................................................................... 140
10-1. Displaying the check program screen ...................................................................................140
10-2. Performing needle thread trimmer origin adjustment.......................................................... 141
10-3. Performing bobbin thread trimmer origin adjustment ......................................................... 142
10-4 Performing sensor check......................................................................................................... 143
10-5. Performing LCD check ............................................................................................................146
10-6. Performing touch panel compensation .................................................................................147
10-7. How to carry out the external output check .......................................................................... 149
10-8. How to adjust the adjuster ......................................................................................................151
10-9. How to adjust the cloth trimming knife motor origin............................................................ 152
10-10. How to correct the presser foot pressure............................................................................ 153
11. INFORMATION FUNCTION..................................................................................... 154
11-1. Observing the maintenance and inspection information ..................................................... 155
11-2. Inputting the inspection time .................................................................................................. 157
11-3. Releasing procedure of the warning ...................................................................................... 159
11-4. Observing the production control information ..................................................................... 160

iii
11-5. Performing setting of the production control information................................................... 163
11-6. Observing the working measurement information ............................................................... 166
12. TRIAL SEWING FUNCTION.................................................................................... 169
12-1. Performing trial sewing ..........................................................................................................169
12-2. Vector parameter list................................................................................................................172
12-3. Thread tension value display color list.................................................................................. 173
13. COMMUNICATION SCREEN OF MAINTENANCE PERSONNEL LEVEL............. 174
13-1. Data which are possible to be handled.................................................................................. 174
13-2. Displaying maintenance personnel level............................................................................... 175
14. INFORMATION SCREEN OF THE MAINTENANCE PERSONNEL LEVEL.............176
14-1. Display of error record ............................................................................................................176
14-2. Display of the cumulative working information .................................................................... 178
III. MAINTENANCE OF SEWING MACHINE.............................................. 179
1. MAINTENANCE......................................................................................................... 179
1-1. Adjusting the needle-to-hook relation ..................................................................................... 179
1-2. Adjusting the needle thread trimmer ....................................................................................... 180
1-3. Adjusting the cloth presser pressure ...................................................................................... 180
1-4. Adjustment of the bobbin presser unit .................................................................................... 181
1-5. Thread tension ...........................................................................................................................181
1-6. Replacing the clamp cushion ...................................................................................................182
1-7. Adjusting the machine head ..................................................................................................... 182
1-8. Replacing the fuse .....................................................................................................................183
1-9. Disposal of batteries..................................................................................................................186
2. GAUGE COMPONENTS ........................................................................................... 188
3. DAILY MAINTENANCE ............................................................................................. 189
3-1. Removing dust near the bobbin case ......................................................................................189
3-2. Cleaning the vacuum lter ........................................................................................................189
4. TROUBLES AND CORRECTIVE MEASURES ......................................................... 190
IV. INITIAL VALUE DATA FOR EACH SHAPE TABLE.............................. 192

– 1 –
1) The material feed mechanism allows the material to be fed quickly at accuratintervals.
2) The number of button holes and the amount of feed can be set and changed with ease by operating the
touch panel. Twenty di󰀨erent patterns can be stored in memory, which enables the operator to quickly
respond to the frequent setup changes.
3) The material is automatically fed to sewing position after it has been placed on the setting position. The
machine automatically performs a series of operations, including sewing, thread trimming and stacking.
4) The operator can set the next material to be sewn while the machine is still sewing, allowing the opera-
tor to have enough time to attend on several machines.
5) Thanks to the presetting mechanism, it is possible for the operator to attend on four machines without
causing one of them to stand idle or for the operator himself/herself to become idle when two pieces of
garment are set on.
6) The clamping mechanism clamps the material securely without allowing any slippage during the sewing
operation from inserting to stacking.
7) Buttonholes can be sewn also to the front to-center strips of ladies wear.
8) The machine has various modes while enable self-diagnosis when an error occurs.
9) It is also equipped with a workpiece detector mechanism which eliminates a sewing start error.
I. MACHINE OPERATION
Mainly consisting of a sewing machine, preset board, carriage, stacker, the AC-172N-1790AN indexer is
designed to automatically carry out a series of operations starting with sewing buttonholes on the front
top-center strips of men’s shirts, etc. and ending with stacking of workpieces.
1-1. Features
1. GENERAL

– 2 –
❶Sewing machine head
❷Preset board
❸ Carriage
❹Stacker
❺ Control panel
❻Power switch
(also used as the emergency
stop switch)
❼Knee switch
❽Pause switch
❾Hand switch
󱢳Workpiece detector switch
󱢴 Air gun
󱢵
Preset adjusting knob
(supplied with the machine
in the tool box )
󱢶Tool box
󱢷Thread stand
󱢸Filter box
󱢹
Machine head pause
switch
❾
❷
❹❺❶
󱢳
󱢵
󱢶󱢴❻
❼
󱢸
❸
❽
󱢷󱢹
1-2. Conguration of the main parts

– 3 –
1. Before you put the machine into operation for the rst time after the set-up, clean it thoroughly.
2. This machine corresponds to the power supply voltage 200 to 240V.
3. Never use the machine in the state where the voltage type is di󰀨erent from the designated one.
4. Operate the machine with the air pressure set to 0.5Mpa.
CAUTION:
To avoid malfunction and damage of the machine, conrm the following.
■Main unit
1①Feed interval : 0 to 610 (0. to 24”)
②Overall feed amount : 610 mm (24”)
③
Number of buttonholes which
can be sewn
: 1 to 20
④Distance from the top end of
the garment body to the 1st
buttonhole
: 0 to 140 mm (0 to 5.5”)
⑤Distance from the side end of
the garment body to the but-
tonhole
: 7 to 21 mm (0.3 to 0.8 inch)
⑥Applicable garment size that
can be sewn
: Width 220 to 420 mm (8.7 to 16.5”)
Length 400 to 880 mm (15.7 to 34.6”)
2Number of patterns that can be
stored in memory
: 20
3Power supply : 220 to 240V (Single phase)
200 to 240V (3-phase) (Rated voltage ± 10% or less)
(Without voltage changeover)
4Power source frequency : 50/60 Hz
5Power consumption : 800 VA (supply voltage ± 10% or less)
6
Operating air pressure : 0.5 MPa
7Air consumption :240 Nl/ min . or less
8Machine dimensions : Width 1,910mm Depth 850mm Table Height 920 mm
9Weight : 300 kg
10 Noise :
- Equivalent continuous emission sound pressure level (L
pA
) at the work-
station:
A-weighted value of 83.0dB; (Includes K
pA
=2.5dB); according to ISO
10821 - C.6.3-ISO 11204 GR2 at 4000 sti/min.
- Sound power level(L
WA
);
A-weighted value of 88.0dB; (Includes K
WA
= 2.5dB); according to ISO
10821 - C.6.3-ISO 3744 GR2 at 4200 sti/min.
■Sewing machine components
1 Machine head : LBH-1790ANS/ACH
2 Sewing speed : Max. 4,200 sti/min
(Number of revolutions at the time of delivery : 3,600 sti/min)
3 Stitch length : Max. 25 mm X sewing width 4 mm
4 Size (knife size) : 6.4 to 19.1 mm (1/4 to 3/4”)
5 Needle : DPx5 #11J to #14J
6 Lubricating oil : JUKI New Defrix Oil No.1
7 Number of stitches : 0.2 to 2.5 mm
①
④
②
⑥
⑥
⑤
2. SPECIFICATIONS
1-3. Operating precautions

– 4 –
❸
❹
❺
❻
❼❾
❽
❶Front guard
❷Front auxiliary connecting
plate for machine head
󱢳Rear guard
The machine head xing plate, which has been factory-installed on the sewing machine head at the time
of delivery, should be removed.
[Removing the front guard]
1) Loosen screws ❸and ❹. (It is not
necessary to remove them.)
The clamping plate which clamps the
sewing machine head is installed under
the front guard. Be sure not to forget to
remove the clamping plate.
2) Remove screws ❺which are used to secure the front
guard and the table.
Fit spanners ❽and ❾respectively on bolt ❼which
are used to x screw ❺. Securing spanner ❾, turn
spanner ❽clockwise. When one nut ❼ is removed,
x the remaining one with spanner ❾. Fit hexagonal
wrench key ❻on screw ❺and turn the screw clock-
wise.
The removal procedure for the
rear guard is same as that for
the aforementioned front guard.
[Removing the rear guard]
Clamping plate
❶
❷
󱢳
❽
❾
❻
❺
3. INSTALLATION
3-1. Removing the machine head xing plate

– 5 –
1) Insert air hose ❶into one-touch joint ❷supplied
with this unit, and x it using metal ttings or the
like.
2) Insert one-touch joint ❷into joint ❸until it clicks.
3) Set the air pressure gauge to 0.5 MPa. To adjust,
raise knob ❺of regulator ❹in direction A, and
turn knob ❺clockwise (direction C) to increase
the air pressure, or turn the knob counter-clock-
wise (direction D) to decrease the air pressure.
4) When the air pressure gauge has been set to 0.5
MPa press knob ❺in direction Buntil it clicks.
The sound indicates that the gauge has locked.
When bottle ❻ is lled with water, be sure
to drain off the water by removing one-
touch joint ❷ from regulator ❹, and by
pressing drain button ❼.
Drain o󰀨 the water every time the machine
is used , either before or after operation.
1) Check to be sure that the power supply in use is
200 to 240 VAC.
2) First conrm that power switch in “OFF”, then
connect the power cord to the power supply.
3) Turn the power ON. Check that the blower motor
is rotating.
The sewing machine is not provided with
a terminal block or the like for changing
over the voltage. As long as the power
supply in use is in the range of 200 to 240
VAC, the sewing machine can be directly
connected to the power supply.
3-2. Connecting the power supply
3-3. Installing the air hose
❺
C
D
B
A
❸
❷
❶
❹
❻
❼

– 6 –
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.
3-4. Lubrication
❷
❹
❸
❷
❶
1) Lubricating oil to oiling tank
○ Fill the oiling tank with JUKI New Defrix Oil No.1 up to the level indicated by “MAX” ❶.
When supplying oil to the oil tank through the lubricating hole, take care not to allow dust to en-
ter the oil tank.
○ Supply oil in the case the oil cannot be visually observed from the front side of the oil tank.
2) Adjusting the lubrication for the sewing hook
○ The amount of oil is adjusted with oil amount adjusting screw ❷.
○ Amount of supplied oil is reduced when turning the screws ❷clockwise.
○ When you rst operate your sewing machine after set-up or after an extended period of disuse, re-
move the bobbin case and apply a few drops of oil to the hook race. In addition, apply a few drops oil
from oiling hole ❹in hook driving shaft front metal ❸to soak the inside felt in oil.
Detailed diagram of oil amount adjusting section
Oil pipe
Decrease
Front
side
Front side
Increase Decrease
Oil amount
Increase

– 7 –
* The adequate oil quantity is achieved when the
oil spots are made on paper within a range of 2 to
5 mm in width (oil spots should not be in the form
of lines).
40 mm
100 mm
2 to 5 mm
Approximately
0.5 mm
Approximately
0.5 mm
❺
❻
3) How to check the hook oil quantity
1. In preparation for checking the hook oil quan-
tity, cut a sheet of paper to make a piece of
paper size of which is approximately 40 mm x
100 mm.
2. After the adjustment of the oil quantity, start
the sewing machine at a high speed (3,600
sti/min) by 100 times or more.
3. Insert the piece of paper prepared in Step 1
into the clearance provided between the hook
cover and the bed base so that it is placed
near the underside of the hook.
As a guide, insert the paper until it comes in
contact with the hook oil shield.
4. Supporting the paper with hand, run the sew-
ing machine by ve cycles using the standard
pattern (3,600 sti/min) and check the splash-
ing oil quantity.
In the case the oil quantity is too much
even after the oil controlling screw is
fully tightened, remove the hook shaft
coupling ❺ and cut o󰀨 the excess of oil
wick ❻.

– 8 –
3-5. Installing the panel
1) Fix operation panel mounting plate ❶on base
plate ❷. Use setscrews ❸(M5 x 25) supplied
with the unit.
3) Open cover ❺of operation panel ❹. Connect
secured panel cord ❻to the support post.
❹
❷
❶❸
❹
❻
❺
2) Install operation panel ❹.

– 9 –
1) Assemble the thread stand unit, and x the
assembly in the hole in the table as shown in the
gure.
2) Tighten locknuts ❶so that they securely hold
the thread stand assembly.
3) In the case of ceiling wiring, pass the power
cable through spool rest rod ❷.
3-8. Installing the thread stand
❷
❶
❶
❶
3-7. Installing the thread guide
Be sure to install and use eye protection cover ❶
and use the sewing machine.
WARNING :
Be sure to attach this cover to protect the eyes from the disperse of needle breakage.
3-6. Installing the eye protection cover
Operator
Thread guide rod
Securely put the thread guide pin into the mounting
hole in the top surface of the sewing machine in
such a way that the two holes in the side face of the
thread guide pin face toward you.

– 10 –
2) Secure marking-light cord ❺and operation-pan-
el cord ❻on strut ❼by means of cable clip
band ❹.
3) Fix marking-light cord ❺together
with operation-panel cord ❻and
grounding cord ❽at two locations
underside the cabinet with clamps
❾.
4) Open the control box. Connect connector 󱢳of
the marking light to CN113.
󱢳
❾❾ ❽ ❺ ❻
❼
❻
❹❺
3-9. Installing the marking light
1) When installing the device, temporarily x mark-
ing-light mounting base ❶on base plate ❷with
setscrews ❸(2 x M4) supplied with the unit.
Marking light specications
Class 2 laser product
Maximum output: 1mW
Wave length: 635nm (Red)
Safety standard
JIS C 6802:2014
IEC60825-1:2014
❶
❸❷
WARNING :
1. If the laser light directly enters the eye, eyesight trouble may be caused.
Do not look into the laser inlet/outlet.
2. Never perform installing/removing of the marking lamp with the power turning ON.
In addition, do not use the light other than marking.

– 11 –
5) Adhere seal 󱢵on preset table
󱢴 by a󰀩xing the right and left
edges of the seal at right and
left marking-o󰀨 lines 󱢶on the
table. The location of the seal
to be adhered on the preset
table can be found by align-
ing the scale "21" on the seal
with marking-o󰀨 line 󱢶on the
table.
6) Turn on the power to the marking light. Then, move the entire device to align the light beams irradiated
from the marking light with right and left marking-o󰀨 lights 󱢶on preset table 󱢴. When the device is
correctly positioned, securely tighten setscrews ❸(2 x M4).
󱢵
󱢴󱢴
󱢵
󱢶󱢶

– 12 –
3-10. Adjusting the marking light
* Setting procedure in the case the distance from
the edge of placket material to the buttonhole is
15 mm
1) Loosen setscrews ❶.
2) Turn marking light ❷in the direction of the arrow
to adjust the pointer to "15" of the seal adhered
on the preset table so that the laser light from
marking light ❷irradiates the scale "15."
3) Tighten setscrews ❶taking care not to allow the
laser light to move out of adjustment.
4) Align the pointer of the preset table at the scale
"15" on the seal by means of the preset adjust-
ment handle ❸. (See "I-4-3. Adjusting the
seam allowance" p.37 for the adjusting pro-
cedure.)
❶
❷
❸
A
Refer to "II-3-1. Changing procedure of memory switch data" p.110 for the operation procedure
of the memory switch.
1) Turn the power ON. Set the memory switch K24
(Marking light setting) to the "Enable" A.

– 13 –
❷❸
❶
❺
❻
❾
❼
❽
3-11. Installation and adjustment of the material edge detecting sensor (asm.)
Fig. A
3) Install sensor ❹on the
mounting plate with
screws ❺.
4) Route the sensor
cord along the holes
in mounting plate ❶.
Secure the cord with
cable clips ❻at the
holes to complete the
assembly of material
edge detecting sensor
(asm.) ❼.
(2) Installing the material edge detecting sensor on the machine head
1) Loosen setscrew ❽of the mounting bracket for
the air blower to remove mounting bracket ❾.
2) Put setscrew ❷❸ of material edge detecting
sensor (asm.) ❼ on section A of hand switch
mounting plate 󱢳. Mount both material edge
detecting sensor asm. ❼and mounting bracket
❾with air blower mounting bracket setscrew ❽.
Be sure to check that the setscrew does
not come in contact with hand spinner set-
screw 󱢴.
3) Turn around bracket ❾
so that the air hose faces
the needle bar.
This setting is only available under the men's garment mode. Be aware that the sewing machine
carries out its normal operation even if the material edge detecting sensor is installed.
(1) Assembling the material edge detecting sensor
1) Put screw ❷into the tapped hole in sensor
mounting plate ❶.
2) Fit nut ❸on screw ❷. Tighten the screw unit
it is almost ush with the mounting plate, as
shown in Fig. A, and secure with nut ❸.
❹
󱢳󱢴
A
❽
❷❸
❾
❼
❶
❶

– 14 –
󱢵 󱢵
19.5mm
󱢸
󱢹
4) Secure material edge detecting
sensor cord by means of cable clip
󱢵together with the hand-switch
cord and the air hose.
5) Open the cover of the control box.
6) Connect brown cord (contact) of
the material edge detecting sensor
junction cord 󱢶to sensor junction
cord B asm. 󱢷 (CN105-30), black
cord (contact) to sensor junction
cord B asm. 󱢷 (CN105-26) and
blue cord (contact) to sensor junc-
tion cord B asm. 󱢷 (CN105-27),
respectively.
7) Insert material edge detecting sensor asm. cord
❼into material edge detecting sensor junction
cord 󱢶.
8) Degrease the top surface (at the location where
reective sheet 󱢹 is to be a󰀩xed) of feed plate
󱢸.
9) A󰀩x reective sheet 󱢹on feed plate 󱢸aligning
with the end face of the slot of the feed plate.
If the relevant part of the surface of feed
plate 󱢸 is not adequately degreased,
reective sheet 󱢹 is likely to come un-
stuck.
Degrease
󱢶❼
󱢷
󱢶Black
󱢶Brown 󱢶Blue
󱢷

– 15 –
(3) Adjusting the material edge detecting sensor
Refer to "II-3-1. Changing procedure of memory switch data" p.110 for the operation procedure
of the memory switch.
1) Turn the power ON. Set K23 (material edge detecting
sensor setting) in "enable" A.
2) Set U53 (jump functions setting) in "enable jump" B.
A
B

– 16 –
C
D
3) Set the amount of feed from the material edge Cat 65
mm under the AC mode.
4) Press the ready key to bring the sewing machine into
the sewing state. Then, place a piece of cloth of approxi-
mately A4-size(210mmx297mm) on the preset section.
5) Actuate the preset device to start sewing.
6) Measure the distance Dfrom the material edge to the
edge of a buttonhole. Enter the measured value in the
eld above the K26 pictograph. (Initial value is 65 mm.)
7) Now, the positioning of the sensor is completed. Enter
the desired amount of feed in Cand measure the afore-
mentioned distance for the purpose of conrmation.