Dürkopp Adler 650-16, Руководство по эксплуатации

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Operation
Operating Instructions 650-16 - 02.0 - 08/2016 27
To replace the hook thread bobin:
Removing an empty bobbin
1. Push the hook cover (2) downwards.
2. Move the needle to the up position.
3. Lift the bobbin housing flap (1).
4. Remove the bobbin housing upper section (7) with the
bobbin (3).
5. Remove the empty bobbin (3) from the bobbin housing upper
section (7).
Inserting a full bobbin
1. Insert the full bobbin (3) into the bobbin housing upper
section (7).
2. Feed the hook thread through the slot (4) under the tensioning
spring (5) into the hole (6).
3. Pull the hook thread approx. 5 cm out of the bobbin
housing (7).
4. The bobbin must rotate in the direction of the arrow when
pulling out the thread.
5. Insert the bobbin housing (7) again.
6. Push the hook cover (2) upwards.
4.7 Thread tension
Together with the bobbin thread tension, the needle thread tension
influences the seam pattern.
The needle thread tension is defined by the pre-tensioner, the
main tensioner and the additional tensioner.
Proper Setting
The main tension (1) should be set as low as possible.
The thread interlacing should be exactly in the middle of the
material being sewn.
With thin sewn material, excessive thread tension can lead to
undesired gathering and thread breakages.