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Operation
Fig. 19: Inserting/changing the bobbin (2)
(4) - Edge guide
(5) - Hook cover
(6) - Locking mechanism
To insert or change the bobbin housed in the hook:
1. Fold up the edge guide (4).
2. Push the locking mechanism (6) down and keep it pressed.
3. Slide the hook cover (5) to the right.
The hook cover (5) must be pushed passed the proximity switch (7)
Fig. 20: Inserting/changing the bobbin (3)
(8) - Bobbin case retainer
4. Open the bobbin case retainer (8) and, if applicable, remove the empty
5. Clean the sensor of the remaining thread monitor or of the skip stitch
Operating Instructions 550-D800 - 01.0 - 05/2023
as it will otherwise not be possible to remove the bobbin from the
hook and to re-insert it.
The hook cover (5) is now unlocked.
⑧
bobbin.
detection using compressed air ( p. 47).
④ ⑤
⑥
(7) - Proximity switch
(housed in the hook cover)
33
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