Stitch Length Adjustment Forwards And In Reverse - Pfaff 2438 plusline Instruction Manual

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Stitch length adjustment forwards and in reverse

.05.30
Requirement
At a maximum speed of 400 spm, the stitch length selected on the control panel should not
differ from the actual stitch length when sewing forwards or in reverse.
Thread the machine.
Switch the machine on.
Selected the stitch length being used on the control panel.
With parameter 607 limit the maximum speed to 400 spm.
Set parameter 846 at 100.
Place the workpiece under the presser foot.
Sew a seam with at least 20 stitches.
Measure the length of the seam over 20 stitches and calculate the actual stitch length.
If the difference, measured over 20 stitches, is larger than +/- 0.5 mm, the value for
parameter 846 must be corrected.
Take the value for parameter 846 from the table or calculate it with the aid of the formula:
Stitch length 2.2 mm
56,0
55,5
55,0
54,5
54,0
53,5
53,0
52,5
52,0
51,5
51,0
50,5
50,0
49,5
49,0
48,5
48,0
47,5
47,0
46,5
46,0
45,5
45,0
44,5
44,0
Set stitch length
Actual stitch length
Stitch length 2.0 mm
78 52,0
79 51,5
80 51,0
81 50,5
81 50,0
82 49,5
83 49,0
84 48,5
85 48,0
85 47,5
86 47,0
87 46,5
88 46,0
89 45,5
90 45,0
91 44,5
92 44,0
93 43,5
94 43,0
95 42,5
96 42,0
97 41,5
98 41,0
99 40,5
100 40,0 100
x 100
Stitch length 1.6 mm
77
78
78
79
80 42,0
81 41,5
82 41,0
82 40,5
83 40,0
84 39,5
85 39,0
86 38,5
87 38,0
88 37,5
89 37,0
90 36,5
91 36,0
92 35,5
93 35,0
94 34,5
95 34,0
96 33,5
98 33,0
99 32,5
32,0 100
Adjustment
Stitch length 1.4 mm
76
77
78
79
80 36,0 77
81 35,5 79
82 35,0 80
83 34,5 81
84 34,0 82
85 33,5 84
86 33,0 85
88 32,5 86
89 32,0 87
90 31,5 89
91 31,0 90
93 30,5 92
94 30,0 93
96 29,5 95
97 29,0 97
98 28,5 98
28,0 100
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