CONTENTS:
1.
General safety instructions
.............................................................................................................................................................. 1
2.
Introduction
.......................................................................................................................................................................... 1
3.
Head of the sewing machine
.............................................................................................................................................. 2
3. 1
Hook and hook post
................................................................................................................................................................ 2
..
3.1.1
Description
3.1.2
Height setting of the hook
3.1.3
Setting the distance of the hook from the needle
3.1.4
Angular setting of the hook (timing)
3.1.5
Protection of the needle and of the hook point
3.1.6
Setting of the bobbin case opener
3.1.7
Setting the regulation of the hook lubrication
3.1.8
Replacement of the hook
3.1.9
Setting the gear
3.1.10
Dismantling of the hook post
3.2
Needle and thread mechanism
................................................................................................................................. 5
3.2.1
Description
3.2.2
To check the handwheel angular adjustment
3.2.3
Height setting of the needle bar
3.2.4
Side setting of the needle bar holder
3.2.5
Setting the needle (the needle bar holder) in the direction of sewing
3.3
Throat plate and its post
........................................................................................................................................................ 7
3.3.1 Description
3.3.2 Mounting and removing the throat plate and its insert
3.3.3 Side setting of the throat plate post
3.4
Thread tensioners and limiter
................................................................................................................................. 8
3.4.1 Description
3.4.2 Setting the tension of main and auxiliary tensioners
3.4.3 Setting the tensioning mechanisms of the main tensioners
3.4.4 Setting the adapting spring
3.4.5Setting the thread limiter
3.4.6 Setting the
additional thread limiter
3.5 Feeding mechanism of the needle feed and of the lower feed wheel
........................................................................ 10
3.5.1 Description
3.5.2 Stitch length mechanism
3.5.2.1
Setting the upper eccentric
3.5.2.2
Setting the prop
3.5.2.3 a Forward and rearward stitch length distribution (rough)
3.5.2.3 b Forward and rearward stitch length distribution (fine)
3.5.2.4
Setting of the control knob (including the stitch length limitation)
3.5.3 Lower feed wheel
3.5.3.1
Feeding clutches
3.5.3.1.1 Description
3.5.3.1.2 Setting the lever of the second step of feeding(angle, position)
3.5.3.1.3 Setting of the lower eccentric
3.5.3.1.4 Setting the engagement and disengagement of the clutches
3.5.3.2
Wheel feeder and its post
3.5.3.2.1 Height setting of the feeder and tensioning of the chain
3.5.3.2.2 Replacement of the feeder
3.5.4 Setting the top roller (pressing force, height)
3.6 Feeding mechanism of the top roller
....................................................................................................................15
3.6.1 Description
3.6.2 Side setting of the indented lower pulley
3.6.3 Side setting of the indented upper pulley
3.6.4 Setting the tensioning roller
3.6.5
Replacement of the indented belt
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