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2a. Adjustment of feed dog in sideways direction for Pfaff expression 2024, 2034 und 2044
Requirement:
The distance of the feed dog to the right and left edges of the feed slot must be equal (fig. 2).
Check:
● Carry out a visual check of the feed dog position.
Adjustment:
● Tilt the machine toward the rear.
● Unhook spring 3 (fig. 5).
● Unscrew and remove screw 4.
● Turn the handwheel until lobe of drive eccentric 5 is positioned at the rear.
● Fold feed regulator 6 downwards and remove this and link 7 from the connecting bar rod to the left.
● Remove slide block 8 with spring to the right.
● Loosen screw 22 (fig. 4).
● Pull out pin 23 to the right.
● Unhook spring 9.
● Loosen screws 10 and 11.
● Re-position the driving shaft together with the two cylindrical pins 12 and 13 sideways without play until
the feed dog is positioned in the middle of the feed slot.
● Tighten screw 10.
● The pressure of the right cylindrical pin must be 1 kg.
● Tighten screw 11.
● Remove the needle plate.
● Use your finger to pull the feed dog to the front, then release it.
● The complete feed driving shaft 14 must slide slowly to the rear.
● Fit pin 23 without any play and tighten screw 22.
● Move the top feed lever assembly to the front and rear.
The complete top feed lever assembly must move easily and without binding (if necessary remove
cause of binding).
● Re-position crank pin 24 with pull rod 26 sideways until the complete top and bottom feed moves easily
(fig. 6).
● Tighten screw 25 and check again whether the feed system moves freely.
● Loosen screw 15.
● Push slide lever shaft 16 complete with stepping motor 15 about 1 mm to the right.
● Push slide block 8 with spring onto the pin and install it in slide way 13 in the correct curve radius.
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