JUKI LK-1903B User Manual

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6
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X, Y
(mm)
• Selection of the sewing pattern is the same as that of the LK-1900B.
• When the distance between holes of the button used does not t the standard sewing width of the sewing pattern No.,
adjust the sewing width by enlarging/reducing the sewing width.
The way of enlarging/reducing is the same as that of the LK-1900B. Refer to the table given below for the scale for
enlargement/reduction in terms of the sewing width.
• As for the way of conrmation of the needle entry, refer to the conrmation of the shape of sewing pattern in the Instruction
Manual for the LK-1900B.
(Caution) When ascertaingthe needle entry pointof the sewingpattern, there is asection of jump feedof one
stitchbeforetheneedlemousefromtheorigin(centerofthebutton)totherststitch.
TableofXYscalesintermsofthesewingwidth
2.4 2.6 2.8 3.0 3.2 3.4 3.6 4.0 4.3 4.5 4.7 5.2 5.6 6.0 6.2 6.4
% 71 76 82 88 94 100 106 118 126 132 138 153 165 176 182 188
IV. OPERATION
1.Operationofthesewingmachine
As for the operation of the sewing machine, refer to the Instruction Manual for the LK-1900B.
2.Varioussewingmodes
(1) Selectionofthesewingpatternandthesewingwidth
WARNING :
• Whenperformingtheselectionofthepatternorenlargement/reductionofthesewingwidth,makesure
ofthe needleentry point.If theneedle extendsoutside thebutton holeor thesewing patternextends
outsidethebuttonclampunit,theneedleinterfereswiththebuttonholeorthebuttonclampunitduring
sewing,resultinginthedangeroftheneedlebreakageorthelike.
• While checking the shape ofthe pattern, do not depress the pedalupto the second step. Sewing will
startbysodepressingthepedal.So,becareful.
(2) Soft-start
Setting of the soft-start speed at the start of sewing of this machine is “1st stitch : 400 sti/min, and 2nd stitch : 900 sti/min”
only at the time of standard delivery.
When slip-off of thread at the start of sewing or the like occurs, increase the number of stitches of the soft-start in accor-
dance with the thread used and sewing products for use.
For the setting procedure of the soft-start, refer to
“I.8-1. Methodofchangingmemoryswitchdata” p.51
of the Instruction
Manual for LK-1900B.
(3) Threadclamp
Thread clamp device of this machine is set to thread clamp motion prohibited (memory switch) at the time of standard deliv-
ery.
When the thread clamp device is actuated, high-speed start or prevention of slip-off of needle thread at the start of sewing
can be performed. However, there are some matters that demand special attention. When using the machine, refer to
“I.5-8.
Threadclampdevice”p.23
of the Instruction Manual for LK-1900B.

JUKI LK-1903B Specifications

General

Brand	JUKI
Model	LK-1903B
Category	Sewing Machine
Language	English