Height Of The Needle - JUKI MF-7900 Series Engineer's Manual

(10) Height of the needle

WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
1. It is the standard that the top end of needle eyelet of left
needle aligns with the bottom end of looper when the top
end of looper passes the rear of the needle from the extreme
right position and protrudes from the left end of left needle by
approximately 1 to 1.2 mm, dimension B.
(Dimension B : standard needle size #10S)
Reference : Dimension C, height of left needle from top surface A of throat plate
2-needle
Needle gauge Height of left needle C Needle gauge Height of left needle C
3.2
4.0
4.8
5.6
6.4
Reference : Scooping height of looper, dimension from the top
end of left needle eyelet to the top end of looper is 1.2
to 1.4 mm.
Standard adjustment
8.9 ―
8.6 ―
8.1 ―
7.8 5.6
7.3 6.4
– 24 –
To align
Unit : mm
3-needle
―
―
―
7.8
7.3
1.2 to 1.4 mm
❶
D
Equal