6.2.1 Function of the thread main tension and the thread supplementary tension in relation to the sewing
foot lifting
Only Efka DC 1550 DA 321G
The thread supplementary tension can, at any time, be switched on or
off by actuating the switch key 1 (see chapter 6.17) on the key block
of the machine. To this end, the parameter F-255 must be set on “7".
Sewing foot lifting
withing a seam
Sewing foot lifting
after thread trimming
Parameter
setting
Thread main
tension
Thread
supplement.
tension
Thread main
tension
Thread
supplement.
tension
F-196=0 0000
F-196=0 1100
F-196=0 0011
F-196=0 1111
1 = Thread tension opened mechanically
0 = Thread tension closed mechanically
·
If the thread’ s supplementary tension is opened, this condition
will be maintained when lifting the sewing foot.
·
When switching the machine off, the last setting of the thread’s
supplementary tension will be maintained through the mains
connection.
6.2.2 Reparation seam with thread tension always closed
Only Efka DC 1550 DA 321G
When executing a reparation seam, the thread tension is to stay
closed during the lifting of the sewing foot. Then the setting of the
parameter F-196 for the function of the thread main tension and the
thread supplementary tension in relation to the sewing foot lifting is
not active.
For a quick switching on and off of the reparation seam, a parameter
setting first has to be carried out.
·
Programming the reparation seam with key “A” of the Efka
operating panel V810/V820: Set the parameter F-293 to 18.
·
Programming the reparation seam with the key “B” of the Efka
operating panel V810/V820: Set the parameter F-294 to 18.
By actuating the key “A” or “B” on the Efka operating panel V810 or
V820, the reparation seam, with the thread tension being always
closed, can be switched on and off quickly.
If the reparation seam mode was switched on, at the end of the
reparation seam it has to be switched off by actuating the same key of
the Efka operating panel, in order to activate the parameter F-196
again.
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