Pfaff EXPRESSION 2014, Руководство по обслуживанию, Страница: 22 / 112

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