Synchronizing The Hook And Needle Bar Movement - Duerkopp Adler 506 Service Instructions Manual

3.2 Synchronizing the Hook and Needle Bar Movement

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The synchronization of the hook movement to the movement of the
needle bar is made with gauge 1 and timing pin 3.
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Caution Risk of Injury !
Turn the main switch off.
Synchronize the hook and needle bar movement only with the main
switch turned off.
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Insert the timing pin 3 into the hole in the housing on the machine head.
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Turn the handwheel in the direction of run until the timing pin 3 can
be felt to have caught in the groove on the arm shaft crank.
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Tilt the machine head to the side.
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Insert gauge 1 through the hole in the housing.
With a correct setting it must be possible to push gauge 1 into the
recess on the crank 2.
To correct:
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Remove the machine head cover.
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Loosen the clamping screws 5 on the timing belt pulley 4.
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Turn the handwheel in the direction of run until the gauge 1 can be
pushed into the recess on the crank 2.
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Tighten the clamping screws 5.
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Replace the machine head cover again.
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