Looping Stroke - Duerkopp Adler 745-26 Service Instructions Manual

15.6 Looping Stroke

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The looping stroke is the path of the needle bars from lower dead
center to the point where the hook points lie at the center of the needle.
The looping stroke is 2 mm.
It is set with the timing pin 4 (Order no. 0211 000700).
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Caution Risk of Injury !
Turn the main switch off.
Set the looping stroke only with the main switch turned off.
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Remove the folder and needle plate.
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Remove the bobbin case tops 3 with the bobbins.
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Swing the needles to the needle hole center.
For this, clamp a suitable spacer 2 (13.5 mm thick) between the
cylinder 1 and its piston rod.
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Tilt the machine head up at the side.
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Remove the plastic plugs 5.
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Loosen the screws to be found under the plastic plugs 5.
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Swing the machine head back.
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Insert the timing pin 4 through the hole in the machine arm.
The timing pin 4 must catch in the groove on the arm shaft crank.
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Turn the hook manually until the hook points lie at the center of the
needle.
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Tilt the machine head up at the side.
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Tighten the first of the screws found under the plastic plugs 5.
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Remove the timing pin 4.
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Tighten the second of the screws found under the plastic plugs 5.
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Press the plastic plugs 5 into the holes again.
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Remove spacer 2.
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