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Operation
8. Wind on the hook thread, ( p. 29).
Cleaning the skip stitch detection
Even the smallest remnants of fabric in front of the sensor lenses of the
skip stitch detection will cause the skip stitch detection to stop working
properly. To ensure fault-free operation, you must clean the sensor of the
skip stitch detection using compressed air at least once a day ( p. 212).
Fig. 36: Skip stitch detection (5)
(1) - Surface on the hook
To clean the sensor:
1. Switch off the machine.
2. Clean sensors (2) using compressed air.
3. Clean the surface on the hook (1) and the sensors (2) with a cloth.
The machine can be switched back on.
Operating Instructions 550-D800 - 01.0 - 05/2023
WARNING
Risk of injury from moving, cutting and sharp
parts!
Crushing, cutting and punctures are possible.
Remove any sewing dust from the bobbin case and
the light barrier.
Do not clean the lenses of the light barriers unless
the machine is switched off.
(2) - Sensors
①
②
47
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