Pfaff hobbylock 783 - Adjusting the Feed Regulator; Adjusting the Differential

11 Adjusting the feed regulator
When the mark on the feed re-
gulator is set at "N" the
stitch length must be 3 rom.
Hold hand wheel and set short-
est stitch length. Adjustment
is correct when mark on adjus-
ting ring is in line with fi-
gure "1" on adjusting scale
(see Fig. 35).
To adjust, loosen screw 1.
Turn stitch length scale until
mark on adjusting ring is
aligned with figure "1". Tigh-
ten screw 1.
Check:
At the shortest and longest
stitch lengths the mark must
be aligned with figures "1"
and "5" respectively.
12 Adjusting the differential
14
When mark "N" of the control
knob is aligned with the dot
on the hous ing cover the feed
stroke of both feed dogs must
be the same (Fig. 36).
To check setting of differen-
tial, fi t housing cover with
three screws 2 (Fig. 37).
Loosen screw 3 of adjusting
ring (Fig. 38) and turn adjus-
ting ring so that screw 3 is
in middle of elongated hole.
Tighten screw 3 and set knob 4
at "N" (Fig. 38). Mark both
feed bars (Fig. 39).
Check stroke of both feed dogs
at longest stitch length. If
strokes are unequal turn ad-
justing knob A a little until
strokes are equal. Loosen
screw 3 of adjusting ring.
Turn adjusting ring so that
mark "N" is aligned with dot
on front housing cover (Fig.
36) •
Tighten screw 3 (Fig. 38).
Fig. 37
3
4
Fig. 38
Fig. 39
Fig. 35
Fig. 36
2
Etsy seller: PFANTOM