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15
Stitch length adjustment forwards and backwards
.06.16
Rule
The stitch length selected on the control panel should not deviate from the actual stitch
length when sewing forwards and backwards at a maximum speed of 400 min
O Thread the machine.
O Switch the machine on.
O Select the stitch length to be used via the control panel.
O Limit the max. speed to 400 min
O Set the value for parameter 846 to 100.
O Place the workpiece under the sewing foot.
O Sew a seam with at least 20 stitches.
O Measure the length of the seam over 20 stitches and determine the actual stitch length.
O The value for parameter 846 must be corrected if the deviation over 20 stitches is great-
er than +/- 0.5 mm.
O Take the value for parameter 846 from the table or calculate it using the formula:
Stitch length 3.0 mm
58.5
59.0
59.5
60.0
60.5
61.0
61.5
62.0
62.5
63.0
63.5
64.0
64.5
65.0
O Select the determined value for parameter 846 and switch off the machine.
-1
Set stitch length
Actual stitch length
Stitch length 2.5 mm
102
48.5
102
49.0
101
49.5
100
50.0
99
50.5
98
51.0
98
51.5
97
52.0
96
52.5
95
53.0
94
53.5
94
54.0
93
54.5
92
The stitch length adjustment backwards is performed under parameter "847"
according to the work steps mentioned above; the key for reverse sewing must
be pressed, see chapter 7.02 Keys on the machine head. Further information
about selecting and changing parameters and explanations (functions) about
the individual parameters can be found in chapter 15.11 Parameter settings.
via parameter 607.
Stitch length 2.0 mm
103
38.5
102
39.0
101
39.5
100
40.0
99
40.5
98
41.0
97
41.5
96
42.0
95
42.5
94
43.0
93
43.5
93
92
Adjustment
.
-1
Stitch length 1.5 mm
104
28.5
105
103
29.0
103
101
29.5
102
100
30.0
100
99
30.5
97
31.0
96
31.5
95
32.0
94
32.5
93
92
98
97
95
94
92
23
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