Programming
Service Instructions M-TYPE DELTA - 00.0 - 12/2019 175
Calibration of the Feed calibration
The stitch length must be the same in forward and backward stitches.
As a test, sew a seam forward on paper, stop, and sew a seam backward.
The punctures of the forward and backward stitches have to lie within one
another. If this is not the case, then calibration is necessary.
To calibrate the stitch length:
1. Set the stitch length mechanically ( p. 41).
2. Call up the Service > Calibration > Feed calibration
menu item.
3. Select the stitch length (-6/0/6) and confirm with OK.
4. Start the sewing test on paper with the pedal and then check the stitch
length:
5. If the test run is not the correct length, the values must be adjusted
accordingly:
Fig. 125: Calibration of the Feed calibration
WARNING
Risk of injury from the heavy machine head!
Crushing possible.
Tilt the machine carefully and in a controlled
manner. Never reach with the hands under the
machine.
Stitch length Length of test run
-6 Test run must be 60 mm.
The test run is sewn backwards.
0 Test run must be almost 0 mm, and the penetration
hole is round, not oval.
6 Test run must be 60 mm.
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