Pfaff 3811-11/43, Instruction Manual

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17.4 Lateral motion of main and differential feeds
Requirement:
at:
- stitch length 4 mm
- cam setting “0”
- needle bar position 0.8 mm below its t.d.c. (top dead centre)
the main feed dog 6 (diag 12) and the differential feed dog 7 should not move
when the lever 13 (diag 11) is activated).
.1 Loosen the feeding motion eccentrics 14 (fig. 13) and 15 a little (4 screws).
.2 Using the handwheel, bring the needle bar into a position 0.8 mm below its t.d.c. (= hole “4”, fig. 14)
and lock it in this position with the cylindrical pin.
.3 Set the stitch length at 4 mm (stitch length adjustment lever 1, fig. 15).
.4 Set the control cam 8 (fig. 16) at "0" (turn cam carrier 9 on its shaft).
Note: In order to be able to see more effectively that the feed is at a standstill, insert screwdrivers
in the clamp slots of the feed cranks 5 and 16 (fig. 17).
.5 While continually moving the lever 13 (fig. 11) up and down, turn the feeding motion eccentrics 14
and 15 (diag 13) in such a way that the notch can be seen and the main feed dog 6 (fig. 12) and the
differential feed dog 7 (i.e. the screw-driver) do not move all.
.6 Screw the feeding motion eccentrics 14 and 15 tight in this setting.
.7 Remove the cylindrical pin.
6
7
11 12
Bi14-02N.CDR Bi17-09.CDR
13