Position Of The Needle Guard; Clearance Between The Looper And Needle - JUKI MF-7000 Series Engineer's Manual

MFC

5) Position of the needle guard

1 The height of the rear needle guard is adjusted so that the point of the right needle comes to the 1/
2 height of the contact surface of the rear needle guard when the blade point of the looper aligns
with the right side of the right needle.
Adjust the pushing amount so that the right needle and the middle needle are slightly pushed, and
so that the left needle just comes in contact with the rear needle guard and should not be pushed.
(The blade point of the looper should not contact the respective grooves of the all needles.)
Align
Contact surface of
rear needle guard
2 The height of the front needle guard is 1.75 ±0.1 mm from the lower part of the looper.
The face of the guard position is parallel to all needles having a clearance of 0.25 ±0.1 mm.
1.75 mm

6) Clearance between the looper and needle

Clearance between the blade point of the looper and the grooves of the right and left needles is 0 to
0.05 mm. (Clearance of the middle needle is a little larger.)
0 to 0.05 mm
Top point of looper
Standard Adjustment
No contact
1/2
Pushing amount : Slightly push right needle and middle needle.
Looper
Front needle guard
Right needle
−
Make the left needle just come in contact with the
rear needle guard and do not push it.
Needle
0.25 mm
0 to 0.05 mm
Needle
35
−
Front needle
guard
Looper