8-2 Stitch length
Adjustable from 2.1mm to 4.2mm with no steps.
The number of stitches per inch (25.4mm) is as follows.
Stitch
length
Number of
stitches per inch
4.2mm 6
3.6mm 7
3.2mm 8
2.8mm 9
2.5mm 10
2.3mm 11
2.1mm 12
< Note >
Screws B are used to fix the lever or to regulate an adjustable range of differential
feed ratio.
■
To change the stitch length
1.
Loosen screw A on the needle guard.
Move needle guard B to the extreme rear end of
the machine.
Then tighten screw A temporarily.
2.
Remove rubber plug C.
3.
Loosen screw D. To increase the stitch length,
move screw D upward. To decrease the stitch length, move screw D downward.
4.
When the required stitch length is achieved, tighten screw D securely and then
replace rubber plug C.
5.
Adjust needle guard B and tighten screw A (refer to "Adjusting the needle guard" on
page 11).
8-3 Adjusting the differential feed
To adjust the differential feed, turn differential feed
adjusting outside lever A clockwise or
counterclockwise. If lever A is aligned with the
mid-point between readings "4" and "5", the
movement amount of the main feed dog will be equal
to that of the differential feed dog.
Then the differential feed will not become effective.
■
Normal differential feed (for gathering effect)
Move lever A toward reading "
＋
".
The maximum differential feed ratio is 1:1.3 with
lever A at reading "9".
■
Reverse differential feed (for stretching effect)
Move lever A toward reading "
−
".
The maximum reverse differential feed ratio is 1:0.7 with lever A at reading "1".
If the top ply is left at the end of sewing, move lever A toward reading "
＋
".
If the bottom ply is left at the end of sewing, move lever A toward reading "
−
".
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