HIGHLEAD GC20528-BDZA Інструкція з експлуатації - Сторінка 8

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16.TIMING BETWEEN ROTATING HOOK MOTION AND NEEDLE

MOTION

（1）Set the stitch length on the stitch length dial shown

table.

（2）When the needle is lifted A shown table, from the lowest

position, as shown in Fig. The following positional relationship

should be maintained:

a．The lower edge of needle eye should be 1.0-1.6mm below

the hook point.

b．The hook point should be located the center of the needle

axis.

c．Gap between the hook point and the side face of needle

should be 0.05mm.

Note:Positioning of hook point

（1）When the needle is at DOWN position,the smaller gear

should be engaged with the large gear so that the "S"screw of the

latter gear on the reverse side.

（2）Tighten each "S"screw,where is punched for set screw,on

the hook shaft.

（3）Approximate position of hook "C"screw of hook should

be found close to the needle when the needle is at DOWN position.

To finely adjust timing between the needle motion and hook

Model

Stitch length

Needle lift A

motion,loosen the set screw of large gear and move the hook saddle

in lower shaft axial direction within a rang from 1mm to 2mm.

Note:Position adjustment of needle point

Adjust needle position so that gap between the lower edge of needle is 1.0-1.6mm when the needle is lifted

by A mm from its lowest position.

GC20528-MDZA

2.2mm

GC20528-BDZA

4.5

2.4mm

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