Singer 271K - Page 15

CORD ROTATING
TRIPPING CAM
CAM
SET SCREWS
CORD ROTATING
SECTOR
CORD
FINGER
Fig. 31. Timing the Cord Finger
LOOSEN
LOCK NUT
CORD FINGERI
IN FRONT OF
NEEDLE
FRONT
msnz.
TURN SCREW
TO
ADJUST
TRIPPING
LATCH
ADJUSTABLE
CATCH
CORD ROTATING
SECTOR
Fig. 32. Adjusting the Tripping Latch
LOOSEN
SCREW
TO ADJUST CATCH
CORD
ROTATING
SECTOR
Fig. 33. Setting the Adjustable Catch
TOP CORD FINGER ON MACHINE 271K4
(continued)
TIMING: The cord rotating tripping cam, shown
in Fig. 31, should
actuate the cord finger at
next to the lost stitch in the first bar andagamot
the end of the sewing cycle. When the barring
at the far end of the buttonhole is nearly finished,
finger should swing to position in front of needle
as shown in Fig. 32, and remain there until
buttonhole is finished. Finger should then return
to
its starting position at right of needle, shown
in Fig. 33.
To time cord rotating tripping cam, loosen
the two set screws, shown in Fig. 31, in hub of
cam and turn
cam on its upright shaft, as re
quired. Then securely tighten cam set screws.
TRIPPING LATCH FUNCTION: The cord finger
tripping latch,
shown in Fig. 32, should hold
cord rotating sector in position (keeping finger
in
front of needle) while machine is stitching
entire right side of buttonhole.
To adjust, loosen lock nut, shown in Fig. 32,
and turn latch screw as required. Then securely
tighten lock nut.
ADJUSTABLE CATCH FUNCTION: The ad
justable catch, located on underside of sector,
must accept tripping latch as
shown in Fig. 32,
at next to last stitch in first bar.
To adjust, loosen screw, shown in Fig. 33
immediately behind adjustable catch, and move
catch as required. Then securely tighten screw.
15
From the library of: Superior Sewing Machine & Supply LLC