Singer 601 - Page 13

SETTING THREAD PULLER ACTION CAM ADJUSTING PLATE
The thread puller action cam adjusting plate E2 should beset so that its step portion will align with the follower
on the thread puller action plate F2 when distance from top of needle bar connecting stud to underside of arm at
needle end. needle bar in ascent, is 69.7mm (2.744") in "BD, BF. GD and GF” varieties ot 591 D200/210/240 and
601D machines. 72.4mm (2.850") in "BD. BF. GD and GF” varieties of 591D300/310 and 591D318BD/BF ma¬
chines. 68.8mm (2.708”) in 591 D21 5BD/BF/GD/GF machines and 71.2mm (2.803”) in 591 D31 5BD/BF/GD/GF
machines. (Figs. 80 and 81 )
On compound feed machines, the thread puller action cam adjusting plate should be set so that its step portoin
will align with the follower on the thread puller action plate when distance from top of needle bar connecting stud
to lower end of needle bar frame, needle bar in ascent, is 83.2mm (3.276”) in "BD. BF, GD and GF” varieties of
591 C200/21 0/240 machines, 78.3mm (3.083”) in “BD. BF. GD and GF” varieties of 591C300/3 10 machines and
79.5mm (3.1 29”) in 591C318BD/BF machines. ( Figs. 80 and 82)
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(FOR DROP FEED MACHINE)
Fig. 82
(FOR COMPOUND FEED MACHINE)
ADJUSTING GAP BETWEEN TENSION DISCS
The gap between the two tension discs should be 0.8 — 1.0mm (.032 — .039”) while the tension is released. This
gap will not increase even if the presser bar is pushed up as far as it will go.
Adjust gap as instructed below. (Figs 83 and 84)
1. Check that the tension (complete) is correctly set in position.
2. Loosen the set screw H2 holding the tension releasing cam bracket G2 and move bracket to the left or right as
required until desired gap has been achieved.
3. Hold bracket G2 in this position and firmly tighten the set screw H2.