Adjusting The Feed Relation - JUKI MF-7900 Series Engineer's Manual

(14) Adjusting the feed relation

WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
1. Changing the stitch length
It is possible for the standard stitch length to adjust up to 0.9 to 3.6 mm.
Turning feed adjust knob ❶ clockwise increases the stitch length and turning it counterclockwise de-
creases the stitch length.
2. Changing the differential feed ratio
Differential feed ratio is 1 : 0.9 to 1 : 1.8 (stitch length : less than 2.5 mm).
Standard adjustment
❻
❹
❺
A
1:1.8
1:1
1:0.9
Differential feed ratio :
1 : 0.9 to 1 : 1.8
❷
❼
❽
C
B
Differential feed ratio :
1 : 0.6 to 1 : 1.1
– 38 –
❸
❶
❽
❼
1:1.1
1:0.9
1:0.6