−
50
−
No.
State at the time of delivery
2,500 r.p.m.
200 r.p.m.
600 r.p.m.
1,000 r.p.m.
2,500 r.p.m.
2,500 r.p.m.
No. 50 : 1
No. 51 : 1
No. 52 : 1
0
0
0
0
0
0
Solenoid type : 0
Pneumatic type : 3
1
0
+X : 50
-X : 50
+Y : 30
-Y : 30
2
2
0
Setting range
200 to 2,500 r.p.m.
1st stitch : 200 to 900
2nd stitch : 200 to 2,500
3rd stitch : 200 to 2,500
4th stitch : 200 to 2,500
5th stitch : 200 to 2,500
Pattern No. 50 to 52 can be
individually set.
0 : Ineffective
1 : Effective
0 : OFF
1 : ON (Key lock)
0 : Production counter
1 : Bobbin thread counter
0 : Up position stop (53˚)
1 : Upper dead point stop (0˚)
0 : Origin
1 : Sewing start point
0 : No
1 : Yes
0 : No
1 : Yes
0 : 1 pedal
1 : 2-step pedal
2 : 1 pedal (PK-57)
3 : 3-step pedal (right precedence)
4 : 3-step pedal (left precedenc)
5 : 3-step pedal (no precedence)
0 : No
1 : Yes
0 : Lifting
1. : Prohibited
X : 0 to
±
50
Y : 0 to
±
30
(Unit : 1 mm)
0 : Ineffective
1 : Operation panel reset key
2 : Machine head switch
0 : 161˚ Slow
1 : 149˚
2 : 137˚
3 : 125˚ Fast
0 : Yes
1 : No
Function
Setting of upper limit of sewing speed
(Setting in unit of 100 r.p.m.)
Setting of soft start speed
(Start-up speed of 1st to 5th stitch at sewing start is set
in unit of 100 r.p.m.)
Setting of calling service pattern data
Selection of key lock mode
X/Y scale, display of max. speed limitation, and whether
to change can be set. (Prevention of maloperation)
Selection of counter action
Production counter : adding counter
Bobbin thread counter : subtracting counter
Selection of needle bar stop position
Upper dead point stop : After up-position stop, needle
bar rotates reversely and stops near its upper dead
point. (Stop position is higher.)
Selection of reference point of enlargement/reduction
Whether to execute origin retrieval after completion of
sewing (When sewing with normal pattern No.)
Whether to execute origin retrieval after completion of
sewing (When sewing with cycle pattern)
Selection of pedal specifications
Selection of output of wiper solenoid
Selection of prohibition of presser lifting after completion
of sewing
Setting of range of feed travel limit
(Setting separated in domains of +X, -X, +Y, and -Y)
Selection of input of midway stop switch
(When selecting panel reset key, input of midway stop
is performed only during sewing operation.
Selection of feed timing
When thread is not well-tightened, set 1 or 0 to increase
effect. (Main shaft angle sets start of feeding.)
Selection of control of simultaneous jump feed with
thread trimming (Normally, use 0.)
Level
U
U
U
U
U
U
U
U
U
U
U
S
S
U
U
S
5. MEMORY SWITCH (LK-1910, 1920)
™
Purpose of the memory switch .... The memory switches are able to set the various performance of the sewing machine by means
of programming. The contents are separated in the user level (U) and the service level (S).
™
List of items of memory switches
