Instruction manual

Fig. A: Correct thread interlacing in the center of the

material

Fig. B: Needle-thread tension too weak

Hook-thread tension too strong

Fig. C: Needle-thread tension too strong

Hook-thread tension too weak

6.2.1 The influence of the sewing-foot lift on the main thread tensioner and supplementary thread

tensioner, for subclass 669-180312

Button 1 (see Chapter 6.15) on the machine’s r ow of buttons can be

used to activate or deactivate the supplementary thread tension at any

time. The parameter F-299 must be set to "1" for this to work.

Sew ing-foot lift Sew ing-foot

in the seam lift after the

thread has been cut

Parameter Main thread Supplementary Main thread Supplementary

setting tension thread tension thread

tension tension

F-196=0 0 0 0 0

F-196=1 1 1 0 0

F-196=2 0 0 1 1

F-196=3 1 1 1 1

1 = Thread tension opened mechanically

0 = Thread tension closed mechanically

If the supplementary thread tensioner is open, the state of the

sewing-foot lift does not change.

If the machine is turned off, the supplementary thread tension

remains at its previously set state.