JUKI AC-172N-1790 User guide

AC-172N-1790
SETUP MANUAL
ENGLISH

– 1 –
When you install the sewing machine in your plant, be sure to adjust the adjusters and check that the sewing
machine is properly installed. Check the alignment between the preset board and the sub clamp catch plate
following the steps of procedure described below.
1.VERIFICATION OF THE LOCATION OF PRESET BOARD AND SUB
CLAMP CATCH PLATE
1-1. Preparation of the power supply and the air supply
Refer to "!.3-2. Connecting the power supply" and "!.3-3. Installing the air hose" in the Instruction
Manual.
1-2. Preparation of the adjusters
Turn the adjusters (1- 7) until they come in contact with the oor. After they have come in contact with the
oor, turn the adjusters clockwise by one revolution to lift them.
Adjuster 1
Adjuster 2Adjuster 3Adjuster 4
Adjuster 5
Adjuster 6Adjuster 7

– 2 –
1-4. Preparation for the device
Turn the power ON.
1Set the mode to input mode.
When the back-light of LCD display 1shows the input mode in blue
color, it is possible to change the memory switch data. When the back-
light shows the sewing mode in green color, press READY key 2to
change over to the input mode.
2Call memory switch data edit screen.
Press MODE key 3 , and memory switch data (level 1) edit screen A
is displayed.
Further hold pressing the key for 3 seconds, and memory switch data
(level 2) edit screen Bis displayed.
3Select memory switch data to change.
Press ITEM SELECT key 4to select K55 (C).
4Activate the adjuster adjustment mode.
Press READY key 2 to activate the adjustment mode.
Press STOP switch 5 on the machine head, and the preset board trav-
els forward and the cloth plate moves up.
Set up the adjustment gauge in place and adjust the adjuster.
After the completion of adjustment of the adjuster, remove the adjust-
ment gauge. Press the switch on the machine head to return the cloth
plate and the preset board to the home position.
Press the power switch to exit the adjuster adjustment mode.
2
A
B
1
5
1
3
C
1-3. Preparation for the device
2
1
Check to be sure that the seam allowance is set to 21
mm. If not, adjust the seam allowance to 21 mm.
Insert preset adjusting knob 1which is supplied in the
tool box into the hole, and turn the knob to set the seam
allowance to the value indicated by scale (21mm) marker
2. After the adjustment, return knob 1to the tool box to
prevent it from being lost.
24
Caution :
Do not turn the power OFF when the preset board is
traveling forward under the adjuster adjustment mode.

– 3 –
Place the adjustment gauge, which has the same marker dot number with the sub-clamp catch plate number
1, 4or 5, on the preset board. Check whether the 6th thread of the sub-clamp catch plate is aligned with the
adjustment gauge. If not, adjust the location of the preset board and sub-clamp device taking the steps of proce-
dure in "■Adjustment of adjusters and alignment" p.4.
 1-5. Vericationoflocationsofthepresetboardandthesubclampcatchplate
Sub clamp catch plate 1Sub clamp catch plate 4
Sixth thread
Marker dot
number
Operator side
Aligned
Operator side
※ Referto"Adjustment
of adjusters and
alignment" p.4.
Not aligned
Not aligned
Not aligned
(Displaced on the
operator side)
Not aligned
(Displaced on the
opposite side of the
operator)
Operator side
(Caution) Before the adjustment of position of the preset board and sub-clamp catch plates, check whether the
6th thread of the sub-clamp catch plates 1, 4and 5are displaced toward or away from the operator
with respect to the gauge. If the sub-clamp catch plates are displaced in whole, it is necessary to
adjust the seam allowance.
Caution : Check the alignment between the
gauge and the sub clamp locations observing from straight
above the cloth plate and do not touch the devices.
Sub clamp catch plate 5
Sixth thread
Sixth thread
Sixth thread
※ Referto"Adjustment
of adjusters and
alignment" p.4.
Aligned
Adjuster 1Adjuster 2Adjuster 3Adjuster 4
Adjuster 5
Adjuster 6
Adjuster 7

– 4 –
Step 1
1A-1.
In the case the 6th
thread of sub-clamp catch
plate
1
is displaced to-
ward the operator side
with respect to the gauge.
Sixth
thread
1B-1. In the case the 6th
thread of sub-clamp catch
plate
1
is displaced away
from the operator side
with respect to the gauge.
Sixth
thread
1A-2.
Lift adjuster 7, and ad-
just by turning it clockwise
until the 6th thread of sub
clamp catch plate is aligned
with the
gauge. Then, pro-
ceed to step 2.
Sixth
thread
1B-2.
Lift adjuster 1, and
adjust by turning it clock-
wise until the 6th thread
of sub clamp catch plate
is aligned with the
gauge.
Then, proceed to step 2.
Sixth
thread
Step 2
2A-1.
In the case the 6th
thread of sub-clamp catch
plate
4
is displaced to-
ward the operator side
with respect to the gauge.
Sixth
thread
2B-1. In the case the 6th
thread of sub-clamp catch
plate
4
is displaced away
from the operator side
with respect to the gauge.
Sixth
thread
2A-2. Lift adjusters 3and
4, and adjust by turning
them clockwise until the
6th thread of sub clamp
catch plate is aligned
with
the
gauge .
Sixth
thread
2B-2.
Lift adjuster 2, and ad-
just by turning it clockwise
until the 6th thread of sub
clamp catch plate is aligned
with the
gauge.
Sixth
thread
Carry out steps 1 and 2
again.
Step 3
3A-1.
In the case the 6th
thread of sub-clamp catch
plate
5
is displaced to-
ward the operator side
with respect to the gauge.
Sixth
thread
3B-1. In the case the 6th
thread of sub-clamp catch
plate
5
is displaced away
from the operator side
with respect to the gauge.
Sixth
thread
3A-2.
Lower adjuster 5by
turning it counterclock-
wise to adjust so that
they are aligned
with
the gauge.
Sixth
thread
3B-2.
Lift adjuster 5, and ad-
just by turning it clock-
wise until the 6th thread
of sub clamp catch
plate is aligned with the
gauge.
Sixth
thread
Finish the adjustment. Carry out steps 1 to 3
again.
A
×
Not aligned
3-3.
Re-check: Are
the 6th threads of sub
clamp catch plates 1,4and 5
aligned with the gauge?
(See Fig. 1.)
○
Aligned
×
Not aligned
Fig. 1 Fig. 1
A
○
Aligned
2-3.
Re-check: Are
the 6th threads of sub
clamp catch plates 1and 4aligned
with the gauge ?
(See Fig. 1.)
Fig. 1 Fig. 1
Fig. 1 Fig. 1
Caution : Check to make sure that a
clearance is provided with the sub-
clamp catch plate and the preset board.
After the completion of adjustment, be
sure to remove the adjustment gauge.
■Adjustment of adjusters and alignment

– 5 –
If the machine head comes down from its normal position due to aged deterioration, the folded edge of the material
and the seam (the edge) may not be properly aligned when placing the material position on the machine head.
In the case the smallest clearance (the difference in height) between the machine head bed and the feed section
is 0.7 mm or more, place spacers (0.5 mm and 1.0 mm) at locations
1
,
2
and
3
to decrease the clearance (the
difference in height) to 0.7 mm or less
Feed plate
The lowest part of the feed block
0.5 to 0.7mm
Sewing machine bed
Clamp table
Spacer
Mfg. No.
a b
Sub clamp catch plate 1
Sub clamp catch plate 4
Sub clamp catch plate 5
a
b
When moving the device after you have
installed it in your plant, ground the device
referring to the dimensions given on the
attached sheet
2. ADJUSTING THE MACHINE HEAD
3. RECORDS OF ADJUSTED VALUES
123
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