JUKI SC-920, Engineer'S Manual, Page: 45 / 75

– 41 –
22 Needle up/down
correction
switch
changeover
function Function of the needle up/down correction switch is changed
over.
0 : Needle up/down compensation
1 : One stitch compensation 0/1
2 2 0
48
25 Thread trimming
operation after
turning the
handwheel by
han Thread trimming operation after moving the needle away from
its upper or lower position by turning the handwheel by hand is
specified.
0 : Thread trimming operation is carried out after turning the
handwheel by hand
1 : Thread trimming operation is not carried out after turning
the handwheel by hand
0/1
2 5 1
29 Initial motion
time of back-
tack This function sets the suction time of initial motion of back-tack
solenoid.
50 ms to 500 ms
50 to 500
(ms)
2 9 7 0
48
30 Function of
reverse feed
stitching on the
way Function of reverse feed stitching on the way
0 : Function of reverse stitching on the way is not operative.
1 : Function of reverse feed stitching on the way is operative.
0/1
3 0 0
49
31 Number of
stitches of reverse
feed stitching on
the way Number of stitches of reverse feed stitching on the way.
0 to 19
(Stitches)
3 1 4
49
32 Effective
condition of
reverse feed
stitching on the
way when the
sewing machine
is stopping. Effective condition of reverse feed stitching on the way
0 : Function is not operative when the sewing machine stops.
1 : Function is operative when the sewing machine stops.
0/1
3 2 0
49
33 Thread trimming
function by
reverse feed
stitching on the
way Thread trimming function by reverse feed stitching on the way
0 : Automatic thread trimming function after completion of
reverse feed stitching on the way is not operative.
1 : Automatic thread trimming after completion of reverse
feed stitching on the way is performed.
0/1
3 3 0
49
*
35 Number of
rotation at a low
speed Lowest speed by pedal
(The MAX value differs by machine head.)
150 to MAX
(sti/min)
3 5 2 0 0
*
36 Number of
rotation of
thread trimming Thread trimming speed
(The MAX value differs by machine head.)
100 to MAX
(sti/min)
3 6 4 2 0
37 Number of
rotation of soft-
start Sewing speed at the start of sewing (soft-start)
(The MAX value differs by machine head.)
100 to MAX
(sti/min)
3 7 8 0 0
44
38 One-shot speed One-shot speed (The max. value depends on the number of ro-
tation of the sewing machine head.)
150 to MAX
(sti/min)
3 8 2 5 0 0
49
*
39 Pedal stroke
at the start of
rotation Position where the sewing machine starts rotating from pedal
neutral position (Pedal stroke)
10 to 50
(0.1 mm)
3 9 3 0
*
40 Low speed
section of pedal Position where the sewing machine starts accelerating from
pedal neutral position (Pedal stroke)
10 to 100
(0.1 mm)
4 0 6 0
*
41 Starting position
of lifting presser
foot by pedal Position where the cloth presser starts lifting from pedal neutral
position (Pedal stroke)
– 60 to –10
(0.1mm)
4 1 – 2 1
*
42 Starting position
of lowering
presser foot Starting position of lowering presser foot
Stroke from the neutral position
8 to 50
(0.1 mm)
4 2 1 0
*
43 Pedal stroke 2 for
starting thread
trimming Position 2 where the thread trimming starts from pedal neutral
position (When the function of lifting presser foot by pedal is pro-
vided.) (Pedal stroke)
– 60 to –10
(0.1 mm)
4 3 – 5 1
*
44 Pedal stroke
for reaching the
maximum number
of rotation Position where the sewing machine reaches its highest sewing
speed from pedal neutral position (Pedal stroke)
10 to 150
(0.1 mm)
4 4 1 5 0
*
45 Compensation of
neutral point of
the pedal Compensation value of the pedal sensor
–15 to 15
4 5 0
47 Auto-lifter
selecting function Limitation time of waiting for lifting solenoid type auto-lifter de-
vice
10 to 600
(second)
4 7 6 0
50
*
48 Pedal stroke 1 for
starting thread
trimming Position where thread trimming starts from pedal neutral position
(Standard pedal) (Pedal stroke)
– 60
to – 10
(0.1 mm)
4 8 – 3 5
49 Lowering time of
presser foot Lowering time of presser foot after the pedal has been de-
pressed.
(Start of rotation of the sewing machine is delayed during this
time.)
0
to 250
(10 ms)
4 9 1 4 0
52
51 Compensation of
solenoid-on timing
of reverse feed
stitching at the
start of sewing Compensation of starting the solenoid for reverse feed stitching
when reverse feed stitching at the start of sewing is performed.
– 36 to 36
(10°)
5 1 – 8
50
No Item Description Setting range Indication of function setting Ref. page
* Do not change the set values with asterisk ( * ) mark as they are functions for maintenance. If the standard set value set at the
time of delivery is changed, it is in danger of causing the machine to be broken or the performance to be deteriorated.