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Singer 29K71 Manual

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TO REGULATE TAKE-UP LEVER
WITH REGULATOR INDICATOR
The spring tension on take-up lever J, Fig. 29 is adjusted
by thumbnut K. The tension on this lever should be about
the some as that applied to the upper thread by the tension
discs.
When the stitch is set, at the top of the needle bar stroke,
lever J should be held down for enough by the tension of
the thread so that the take-up action will keep the thread
tout until the needle enters the work.
When sewing lightweight materials with fine thread, more
take-up action may be secured by turning the thumbnut K
so that it screws up to decrease the take-up spring tension.
This should be done instead of tightening the thumbnut of
the tension discs.
For heavier materials and thread, the take-up tension must
be about the some as that applied to the upper thread by
the tension discs.
The travel of take-up lever J is regulated by means of
knurled nut L. The indicator near nut L is marked with the
figures O to 4. This indicator provides a useful guide to
the operator in setting the take-up movement most suitable
for the material and thread being used. For thin materials,
such as kid or box calf, turn knurled nut until the zero
mark is opposite the small plunger U.
Other adjustments can be made in steps by turning the nut
to suit any thickness of material and thread within the
capacity of the machine.
NOTE: All machines sent out from the factory are so
adjusted that they will give satisfactory results on a
general range of materials. Before any adjustment is made
to the travel of the take-up lever, the needle bar should be
raised to its highest point.
Fig. 29. Regulating Tension and Travel of Take-up Lever
ADJUSTMENT OF THREAD TAKE-UP
LEVER REGULATOR INDICATOR
The range of adjustment given by the indicator, when sent
out from the factory, should suffice for all general
purposes, but, if desired, the range can be raised or
lowered by means of the adjusting screw T, Fig. 29 at the
extreme right.
To alter the range, loosen the lock nut S and, using a
screwdriver, turn the centre screw T to the right to reduce
the travel of the take-up lever.
To increase the travel, turn the screw T to the left. Wear at
the tip of the centre screw can also be taken up in this
manner. When the proper adjustment has been obtained,
tighten the lock nut S.
It is most important that the hexagon head nut R be
securely locked against the face of the piston.
TO CHANGE LENGTH OF STITCH
The length of stitch is regulated by the stitch regulator
which is held in position by thumbscrew M, Fig. 30 at
back of the feeding foot bar. Loosen thumb screw M and
move the regulator up or down until its top is in line with
the mark indicating desired number of stitches to the inch
as shown by the arrow. Then tighten the thumb screw.
Fig. 30. Changing Stitch Length
10
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