Singer 471U - Page 44

[U Upper clamping foot lifter adjustment
If these parts are not properly adjusted, the upper clamping foot may not be liftedand the material may slip
resulting in unsightly buttonholes.
1. Upper clamping foot pressure adjust
ments
To adjust the upper clamping foot pressure, turn
the pressureadjustment screwO until the distance
from the top of the arm to the pressure adjustment
screw O is within 20 ~ 25 mm.
20~25 mm
(T
2. Upper clamping foot lift stroke
Remove the twoset screws O and remove wick baseA O; next, loosen Allen boltO move theupperclamping
foot lifter arm o to adjust the distance from needle plate top to upperclampingfoot bottomto 13mm when the
upper clamping foot lifter pedal is pressed.
13 mm
i
3. Upper clamping foot position adjustment
Loosen set screws O and O*and move the length feed arm O and upper clamping foot roller O sothatthe
cutter groove comes to the center of the upper clamping foot sight.
Afteradjustment is completed, confirm that the upper clamping foot moves up and down smoothly when the
upper
clamping foot lifter pedal is operated. If movement is not smooth, readjust the length feed arm O-
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From the library of: Superior Sewing Machine & Supply LLC