11.2.3 Turning on the Needle Bars
With cylinder 6 not operated the needle bars are turned off and
arrested in the high position.
The extending piston rod of the cylinder 6 operates the latch 3.
The coupling-in of the needle bars occurs at that moment in which the
crosshead reaches its upper dead center.
Caution Risk of Injury !
Turn the main switch off.
Make the setting only with the main switch turned off.
ATTENTION !
The subclass 745-24 is equipped with two latches.
The 2nd latch is to be set in the same manner.
To turn on the needle bars manually:
–
Press the latch 3 down and hold operated.
–
Couple in the needle bars by turning the handwheel.
–
If latch 3 is not held operated the needle bars uncouple in the high
position at the next revolution.
In the highest (unoperated) position of the latch 3:
The clearance between the bottom 2 of the stopper 1 and the
edge 4 of the latch must be 0.5 mm.
–
Set the clearance by sliding the cylinder 6.
In the lowest (operated) position of the latch 3:
The swing lever 9 with its bottom 8 must move past approx. 1 mm
above the edge 4 of the latch.
–
Loosen the lock nut on setting screw 7.
–
Pull the latch 3 to the back against the stopper 1.
Press latch 3 down into its lowest position manually and hold fast.
–
Turn the handwheel until the swing lever 9 moves into the recess
of the latch 3.
The bottom edge 8 of the swing lever lies opposite edge 4 of the
latch.
–
Set the clearance between both edges by turning the setting
screw 7.
Measure the clearance with a feeler gauge.
–
Tighten the lock nut on setting screw 7.
Position of the swing lever 9:
When the cylinder 6 is vented the latch 3 with its shoulder 4 catches
under the stopper 1.
At its furthest swing to the back (in the direction of the arrow) the
swing lever 9 must still just push the latch 3 off of the stopper 1.
–
Swing the swing lever 9 out of the area of the latch 3 by turning the
handwheel.
–
Release latch 3.
The latch catches with its shoulder 10 under the stopper 1.
–
Loosen clamping screw 13 slightly.
44
