9 - 7
Setting up
9.09 Adjusting the differential feed on the PFAFF 939 U
1
0
2
3
4
1
2
3
Fig. 9 - 10
9.09.01 Sewing without fullness
● Turn adjustment wheel 1 as far as possible in the "+" direction.
● Turn adjustment wheel 2 until " 0 " is at marking 3.
● Turn adjustment wheel 1 back until " 0 " is at marking 3.
● Adjust the stitch length (see chapter 9.08 Adjusting the stitch length).
When sewing without fullness the feed stroke of the main and the differential
feed dogs is the same.
9.09.02 Ständig Mehrweite einarbeiten
● Turn adjustment wheel 1 as far as possible in the "+" direction.
● Turn adjustment wheel 2 until the desired level of fullness (green numbers) is at
marking 3.
● Turn adjustment wheel 1 back until the same green number is at marking 3.
● Adjust the stitch length (see chapter 9.08 Adjusting the stitch length).
The sum of the selected fullness level and the stitch length must not exceed 4.5
because more than this lessens the stitch length.
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