18
2. Adjustment of feed dog in sideways direction for Pfaff expression 2014
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 to the rear.
● Unhook spring 3 (fig. 3).
● Unscrew and remove screw 4.
● Turn the handwheel until the 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.
● 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.
● Loosen screw 15.
● Push slide lever shaft 16 complete with stepping motor 15 approx. 1 mm to the right.
● Push slide block 8 with spring onto the pin and install it in slide way 18 in the correct curve radius.
● Tighten screw 15 and check whether the slide block moves easily and without any play.
● Push link 7 complete with feed regulator 6 to the right onto the connecting bar pin.
● Fold feed regulator 6 to the rear and then upward over feed eccentric 5.
● Place screw 4 in clamping plate 21 and tighten it a little.
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