(+)
(-)
+
-
3
2
1
ADJUSTING STITCH LENGTH :
PUSHING THE PUSH BUTTON
LIGHTLY FIRST AND TURNING
PULLEY TO SET POSITION THEN
PUSHING DOWN THE PUSH BUTTON
INTO ITS SET POSITION AND ADJUST
THE LENGTH OF STITCH .
PUSH BUTTON
MARK
LONG
SHORT
SHOULD GET FROM TEST SEWING .
ACTUAL STITCH LENGTH NEEDED
APPROX LENGTH OF STITCH AND
THE PULLEY ONLY REPRESENT
REMARK : THE DISTANCE MARK ON
RATIO AS NEEDED .
FACTORY . ADJUST DIFFERENTIAL
WHEN MACHINES WERE OUT OF
DIFFERENTIAL RATIO WAS SET AT 1 : 1
ADJUSTING DIFFERENTIAL RATIO :
TIGHTEN NUT (2) . FOR
THEN
(2) MOVE LEVEL (1) UPWARD OR
OPEN UP CLOTH PLATE , LOOSEN NUT
MICRO-ADJUSTMENT PLEASE TURN
ADJUSTING SCREW (3) .
STRETCH STITCH
SHRINK STITCH
STRETCH STITCH
SHRINK STITCH
DOWNWARN TO THE POSITION NEEDED.
11
2
2
3
3
4
4
5
5
6
6
7
7
+
+
-
-
3-5 ADJUSTING STITCH LENGTH AND DIFFERENTIAL RATIO :
