Adjustment Of The Needle Guide; Adjustment Of The Thread Trimming Mechanism - JUKI MB-1800 series Instruction Manual

6. Adjustment of the needle guide

WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
1
2
0.05 to 0.1 mm

7. Adjustment of the thread trimming mechanism

WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
2
1
8
9
Top end of thread separation nail
1
2
ADJUSTMENT OF THE SEWING MACHINE
6
3
5
4
7
0.5 to 0.7 mm
Loosen screw 2 and provide a 0.05 to 0.1 mm
clearance between the needle and needle guide 1 by
moving needle guide 1 to the left or the right when
the needle bar is in the lowest position of its stroke.
(1) Adjusting the position of the moving
knife
1) Remove cover 1 using setscrew 2.
2) Lift the presser lifting lever to such an extent
that roller 4 and hook 5 of presser lifting lever
3 come in contact with each other to move
thread trimming connecting plate A 9 to its
most advanced position, and insert spanner 6
as illustrated.
3) Insert gauge 7 into the end face of the slit in
throat plate, loosen screw 8, press the top end
of thread triming connecting plate A 9 to gauge
7, and tighten screw 8.
(2) Adjusting the moving knife thread
separation nail
Bend thread separation nail 1 using a screwdriver
or the like and adjust so that a clearance of 0.5 to
0.7 mm should be provided between thread
separation nail 1 and looper 2.