Table of Contents
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1. MACHINE SPECIFICATIONS ..........................................................................................................
2-1.
Needle bar and thread take-up mechanism ............................................................................................. 2-01
2-2.
Lower shaft and rotary hook mechanism ................................................................................................. 2-01
2-3.
Zigzag mechanism ................................................................................................................................... 2-02
2-4.
Presser foot mechanism .......................................................................................................................... 2-03
2-5.
Feed mechanism ..................................................................................................................................... 2-04
2-6.
Lubrication ............................................................................................................................................... 2-06
2-7.
Tension release mechanism .................................................................................................................... 2-07
3-1.
Cover ....................................................................................................................................................... 3-01
3-2.
Presser mechanism ................................................................................................................................. 3-02
3-3.
Needle bar mechanism ............................................................................................................................ 3-02
3-4.
Rotary hook mechanism .......................................................................................................................... 3-03
3-5.
Feed mechanism ..................................................................................................................................... 3-03
4-1.
Feed mechanism ..................................................................................................................................... 4-01
4-2.
Needle bar mechanism ............................................................................................................................ 4-02
4-3.
Rotary hook mechanism .......................................................................................................................... 4-03
4-4.
Presser mechanism ................................................................................................................................. 4-04
4-5.
Cover ....................................................................................................................................................... 4-05
5-1.
Adjusting the thread tension spring ......................................................................................................... 5-01
5-2.
Adjusting the presser foot height ............................................................................................................. 5-02
5-3.
Adjusting the feed dog height .................................................................................................................. 5-02
5-4.
Adjusting the feed dog angle ................................................................................................................... 5-03
5-5.
Adjusting the forward/back, right/left position of the feed dog ................................................................. 5-03
5-6.
Adjusting the stitch length ........................................................................................................................ 5-04
5-7.
Adjusting the needle and feed mechanism timing ................................................................................... 5-05
5-8.
Adjusting the needle bar height ............................................................................................................... 5-06
5-9.
Adjusting the forward/back position of the needle bar ............................................................................. 5-07
5-10. Adjusting the right/left position of the needle bar ..................................................................................... 5-08
5-11. Adjusting the forward/back position of the zigzag regulator .................................................................... 5-08
5-12. Adjusting the base position of the zigzag width ....................................................................................... 5-09
5-13. Adjusting the needle sidewise movement ................................................................................................ 5-10
5-14. Adjusting the change lever (the needle base position). ........................................................................... 5-10
5-15. Adjusting the needle and rotary hook timing ............................................................................................ 5-12
5-16. Adjusting the hook stopper position ......................................................................................................... 5-12
5-17. Adjusting the rotary hook lubrication amount ........................................................................................... 5-13
5-18. Adjusting the lubrication amount of the needle bar .................................................................................. 5-14
6. TROUBLESHOOTING .....................................................................................................................
CONTENTS
LZ2-B850,B851
1-01
6-01
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