Operation
Operating Instructions 669 - 00.0 - 08/2019 35
Information
At the point where the most thread is required, the thread take-up
lever (3) must be pulled up about 0.5 mm from its lower end
position.
This occurs when the needle thread loop passes the section of
the hook with the widest diameter.
4.8 Sewing feet
4.8.1 Lifting the sewing feet
Fig. 13: Lifting the sewing feet
Subclass 669-180010
The sewing feet can be lifted mechanically by pressing the knee
switch (1).
Subclasses 669-180112, 669-180312
The sewing feet can be lifted electro-pneumatically by pressing
the pedal (2) or the knee switch (1).
(1) - Knee switch (2) - Pedal
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