Jack W4 Series User Manual

2、穿线方法（Threading method）
①、标准穿线法（Standard threading method）：
图 5-2
当机针线伸缩量较大时（When the expansion and contraction quantity of the
needle thread is big:）：
图 5-3（Figure 5-3）
当机针线伸缩量较大时（When the expansion and contraction quantity of the
needle thread is big:）：
图 5-4（Figure 5-4）
1

Jack W4 Series Specifications

General

Number of Threads	3 or 4
Type	Overlock
Lubrication	Automatic
Motor	Servo motor
Stitch Types	Overlock
Bobbin	None (uses loopers)
Speed	Adjustable
Presser Feet	Standard Overlock Foot