Singer 471U - T| Feed Mechanism

Q] Feed mechanism
0
1. When the upper shaft O rotates in the direction of the arrow, the worm O fixed to the upper shaft O also
rotates.
2. The worm wheel O meshes withthe worm o ,and therotating movement istransmitted tothe worm wheel shaft
o
3. The change gear R0 attached to the end of the worm wheel shaft O meshes with the change gear O, which
causes the change gear shaft 0 to rotate.
4. The free wheel gear 0 fixed on the change gear shaft 0 meshes with the feed cam 0 causing it to rotate.
5. The roller 0 attached to the end of the feed adjusting lever 0 fits inthe heart-shaped groove ofthe feed cam and
causes the feed connecting rod 0 to move back and forth using the feed adjusting lever shaft 0 asa pivot point.
6. The end of the feed connecting rod 0 is linked to the feed drive shaft arm pivot point 0 and causes the length
drive shaft feed arm 0, clamping foot 0, and length feed plate 0 connected to the feed drive shaft arm pivot
point 0 to move back and forth.
ffiGear ratios
Change gear R
1 /30 rotation
1 rotation
Change gear L
1 reduction gear
1 rotation
2 rotations
1 /2 rotation
'J
Bychanging the gear ratio (change gear combination) of the upper shaft rotation with respect to one rotation
(one cycle) of the feed cam, the number of stitches can be varied between 58 and 347.
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From the library of: Superior Sewing Machine & Supply LLC