21
-
1. Setting of upper thread tension
dial
VX710
there
IS
no thread tenslon at dlal
"0".
21
-
2. Setting of upper thread tension
dial
VX511, VX541, VX561, VX581, VX516
VX546, VX566, VX586, VX611, VX641
VX661, VX681, VX616, VX646, VX666
VX686, VX720, VX740, VX760, VX780
*
If the upper thread tenslon
IS
too
tlght or too loose, adjust the nut.
After
thls adjustment, make sure
22. Adjustment of feed dog move
-
ment at buttonhole sewing
-
VX541, VX561, VX581, VX546, VX566, VX586
VX641, VX661, VX681, VX646, VX666, VX686
VX740, VX760, VX780
Before adjustment: Set the stitch
length regulator at
"
4
"
.
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