Operation Manual

Operation
Operating manual 275 Version 01.0 - 01/2016 23
Figure 5: Threading procedure for needle thread – part 1
3. Insert the thread through the 1st thread guide (10):
From the rear to the front through the rear hole and from the
front to the rear through the front hole.
4. Insert the thread in a wavelike manner through the holes of
the 2nd thread guide (9): From top to bottom through the
uppermost hole, from bottom to top through the hole in the
middle, and finally from top to bottom through the lowest hole.
5. Guide the thread counterclockwise around the pre-
tensioner (8).
6. Feed the thread from top to bottom through the thread
regulator (7).
7. Guide the thread clockwise around the main tensioner (5).
8. Pull the thread under the thread tensioning spring (6).
9. Guide the thread from the right to the left under the lower
hook (4).
10. Feed the thread from bottom to top through the upper hook (2).
11. Feed the thread from bottom to top through the thread
regulator (7).
(1) - Thread lever
(2) - Upper hook
(3) - Thread clamp
(4) - Lower hook
(5) - Main tensioner
(6) - Thread tensioning spring
(7) - Thread regulator
(8) - Pre-tensioner
(9) - 2nd thread guide
(10) - 1st thread guide
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