Pfaff 2483-980/31, Instruction Manual, Page: 75 / 114

Adjustment
13 - 17
13
.05.15
Stitch length adjustment forwards and in reverse
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.
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Switch on the machine.
●
Select the stitch length being used on the control panel.
●
With parameter 607 limit the maximum speed to 400 spm.
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Set parameter 846 at 100.
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Place the workpiece under the presser foot.
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Sew a seam with at least 20 stitches.
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Measure the length of the seam over 20 stitches and calculate the actual stitch length.
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If the difference, measured over 20 stitches, is larger than +/- 0.5 mm, the value for
parameter 846 must be corrected.
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Take the value for parameter 846 from the table or calculate it with the aid of the formula:
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Select the calculated value for parameter 846 and switch off the machine.
The adjustment of the reverse stitch length is carried out as described in the
above work steps under parameter "847 " , with the reverse feed key pressed,
see Chapter 7.02 Keys on the machine head. More information about selecting
and changing parameters and explanations (functions) of the individual
parameters is contained in Chapter 13.11 Parameter settings.
Set stitch length
Actual stitch length
x 100
Stitch length 2,5 mm Stitch length 2,0 mm Stitch length 1,5 mm
48.5 103 38.5 104 28.5 105
49.0 102 39.0 103 29.0 103
49.5 101 39.5 101 29.5 102
50.0 100 40.0 100 30.0 100
50.5 99 40.5 99 30.5 98
51.0 98 41.0 97 31.0 97
51.5 97 41.5 96 31.5 95
52.0 96 42.0 95 32.0 94
52.5 95 42.5 94 32.5 92
53.0 94 43.0 93
53.5 93 43.5 92
54.0 93
54.5 92
Length over
20 stitches
Value for
parameter
846 / 847
Length over
20 stitches
Value for
parameter
846 / 847
Length over
20 stitches
Value for
parameter
846 / 847