Technical data

Operating the sewing unit
Operating manual 743-221-01 version 01.0 - 09/2013
21
5.5 Setting the thread regulator
The thread regulator (2) controls the quantity of thread required for the
stitch formation.
The thread regulator has to be precisely adjusted for an optimum sewing
result.
The setting of the thread regulator depends on the following factors:
• Stitch length
• Thickness of the material
• Characteristics of the yarn utilized
With correct setting the needle-thread loop (6) should slide without any
overrun and with low tension over the thickest point of the hook.
Fig. 7: Setting the thread regulator
How to adjust the thread regulator:
1. Loosen screw (5).
2. Set the thread regulator (2).
The vertical wire (3) serves in conjunction with the scale (4) as adjusting
aid (guide value: 2.5).
3. Tighten screw (5).
Caution: Danger of injury!
Turn off the main switch.
Adjust the thread regulator only with the sewing
unit switched off.
ATTENTION!
(1) - Thread take-up spring
(2) - Thread regulator
(3) - Wire
(4) - Scale
(5) - Screw
(6) - Needle thread loop
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