Needle Bar Link; Swing Movement; Setting The Needle Bar Link To The Needle Bars - Duerkopp Adler 745-26 Service Instructions Manual

15.2 Needle Bar Link

15.2.1 Setting the Needle Bar Link to the Needle Bars

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For securing the seam the seam beginning and the seam end are
executed with stitch condensation and seam bartacking (swinging the
needle bar link) or only stitch condensation.
–
Activate stitch condensation or bartacking at the seam beginning
and seam end at the controls.
See Short Description DAC Chapter 5.5
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With 1.4 mm stitch length in stitch condensation the bartacking is
generally sewn with a stitch length of 0.8 mm.
For a sure switching on and off of the needle bars the needle bar link
must be precisely set to the needle bars.
The setting is made with the gauge 3 (Order no. 0246 000919).
Caution Risk of Injury !
Turn the main switch off.
Check and correct the setting of the needle bar link to the needle bars
only with the main switch turned off.
Checking the setting
–
Press latch 1 down.
Switch the needle bars in by turning the handwheel.
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Insert the 2.6 mm high setting side of the gauge 3 into the hole 2
on the machine arm.
The gauge must be able to be inserted without play between
needle bar link 9 and the clamping collars 10 of the needle bar.
–
Bring the needle bars into the high position by turning the
handwheel.
A slight resistance must be felt.
–
Insert the 2.8 mm high setting side (marked by the hole).
With a correct setting this side of the gauge can not be inserted
between the needle bar link and the clamping collars.
–
Turn the handwheel.
The handwheel should not be able to be turned beyond the upper
dead center.
Correcting the setting
–
Loosen screws 6.
–
Loosen lock nuts 7.
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Set the clearance between the needle bar link 9 and the clamping
collars 10 by turning the adjusting screws 4 and 8.
Reduce the clearance: Turn the lower adjusting screw 8 clockwise
Increase the clearance: Turn the upper adjusting screw 4
Each adjusting screw lying opposite must first be screwed back.
After the setting is made, turn the adjusting screw lying opposite
against the pin 5.
–
Tighten screws 6.
–
Tighten lock nuts 7.
–
Check the setting with gauge 3 again.
–
Check the setting of the center knife and, if necessary, reset (see
Chapter 15.13).
counterclockwise