Switching On The Needle Bars - Duerkopp Adler 745-26 Service Instructions Manual

15.2.3 Swing Movement
76
The swinging of the needle bar link at the seam beginning and seam
end occurs via the cylinder 2.
After the setting of the eccentric axle 4, the seam bartacking plus
needle transport result in a swing range of approx. 3.5 mm.
The slit 7 must lie in the lower semicircle of eccentric axle 4.
In the idle position of the cylinder 2 (spring return) the clearance of the
needles (needle thickness Nm 100) to the front edges of the needle
hole must be 0.2 to 0.3 mm.
The needle transport occurs compulsory after the entry into the
material.
–
Step back on the left pedal.
The transport carriage runs into its rear end position.
Caution Risk of Injury !
Turn the main switch off.
Set the swing movement of the needle bar link only with the main
switch turned off.
–
Remove the cylinder and the swing lever for the thread puller and
the head cover with folder.
–
Clamp a suitable spacer 3 (13.5 mm thick) between cylinder 2 and
nut 5 of the piston rod.
–
Press latch 1 down.
Bring the needle bars into the low position by turning the
handwheel.
–
Loosen clamping screw 6.
–
Turn the eccentric axle 4 until the needles enter the center of the
needle holes.
The slit 7 must thereby lie in the lower semicircle of the eccentric
axle 4.
–
Tighten clamping screw 6.
–
Remove spacer 3.
The needles lie in the forward position.
–
The clearance from the front edges of the needle (needle thickness
Nm 100) to the front edges of the needle hole must be 0.2 to 0.3
mm.
–
Loosen screws 9 slightly.
–
Set the clearance by setting the mounting plate 8 higher or lower.
–
Tighten screws 9.