The Take-Up Lever; The Feed Dog - Pfaff 260 Service Manual

Stitch Formation
1 Hinge stud
2 Take-up lever link
3 Toke-up crank
4 Motion pattern of the toke-up lever
5 Link toke-up lever
6 Need le bar crank
7 Needle bar connecting link
8 Needle bar connecting stud
9 Needle bar
10 Needle set screw
11 Needle holder
12 Needle
13 Hook point
14 Hook thread guard
15 Hook shaft
16 Hook drive shaft helical gears
17 Hook drive shaft
18 Rotary hook
19 Arm shaft
20 Driving belt sprocket, upper
21 Driving belt (Synchroflex)
22 Driving belt sprocket, lower
23 Driving belt (cord)
Note: The needle plate has been omitted in
order to give o better view.
The Take-Up Lever
Feed Motion
1 Pressure regulating screw
2 Presser bar guide collar
3 Presser bar lifting brocket
4 Presser bar
5 Thread cutter
6 Sewing foot
7 Center stud
8 Feed motion diagram
9 Feed dog
10 Feed bar
11 Feed lifting shaft crank, front
12 Center stud
13 Roller
14 Feed lifting shaft
15 Center stud
16 Feed rock shaft
17 Feed rock shaft crank
18 Center stud
19 Feed lifting shalt crank, rear
20 Finger-tip control H
21 Stitch length dial G
22 Feed regulator
23 Feed eccentric
24 Arm shaft
25 Feed lifting connection
26 Feed forked connection
The function of the take-up is to provide the correct amount of thread
required to enlarge the loop, and to draw back the excess thread after the loop
has passed around the bobbin case. As it approaches the highest point of its
stroke, the take-up lever, assisted by the advancing feed dog, pulls the stitch
tight and at the same time draws additional thread through the upper tension
for the next stitch.
All Pfaff domestic sewing machines are equipped with the long-valued link
take-up (Fig. 17).
fig. 19 Feed dog in operative position Fig. 20 Sewing forward and reverse
The Feed Dog
The principal function of the feed dog is to move the material forward or
backward in accordance with the stitch length set. Reverse feeding is used to
backtack the end of a seam.
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