Dürkopp Adler M-TYPE 667, Operating Instuructions

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3.14 Adjusting the stitch length
Depending on the subclass, the 667 special sewing machines are equipped
with two adjusting knobs. These allow two different stitch lengths to be used
when sewing, which can be selected by using button 4 (see chapter 3.15).
The two adjusting knobs 1 and 2 on the machine arm are used to adjust the
stitch lengths.
– Adjust the longer stitch length with the upper adjusting knob 1.
Position 1 = min. stitch length Position 9 = max. stitch length
– Adjust the shorter stitch length with the lower adjusting knob 2.
Position 1 = min. stitch length Position 9 = max. stitch length
The stitch lengths are equal for both forward and reverse sewing.
– Push the stitch regulator lever 3 down to manually sew bartacks.
The machine will sew backwards for as long as the stitch regulator
lever 3 is depressed.
Tip
To adjust the stitch length more easily, the stitch length which is not to be
adjusted should be activated by using button 2 (see chapter 3.15).
Fig. 19 Fig. 20
CAUTION: Risk of breakage!
The standard sewing-foot stroke set with adjusting knob 2 should not be
greater than the stroke set with adjusting knob 1.
1
2
1
3