Checking The Switch Over Of The Feed Clutch - DURKOPP ADLER 887 Service Instructions Manual

2.7

Checking the switch over of the feed clutch

Rule:
The feed clutch should be switched over when it is motionless (i.e.,
when it is in the dead centre point of its pendulum motion). This can be
detected from the rotational direction of the belt pulley (1) in front of
and behind the dead centre point.
B
1
A 274°
B
–
Set the maximum stitch length.
–
Turn the handwheel (A) so that it is positioned at "274" degrees
(refer to Table / A). Push the bartacking lever down. Check if the
rotational direction (B) of the belt pulley (1) corresponds to the
direction specified in the table. Do the same for "281" degrees.
–
If the rotational directions do not correspond to those specified in
the table, correct the necessary settings. If the clutch switches over
too soon (on a smaller angle), tentatively loosen the adjusting
nut (5) (see chapter 2.5) and repeat the check. Continue loosening
until you locate the correct position for the nut. If the clutch
switches over too late, tighten the controlling nut (5).
Caution: Risk of injury!
Turn the main switch off.
Only carry out this adjustment when the machine is turned off.
CAUTION!
Imprecise settings can shorten the lifespan of the machine.
14
1
2 3
281° 94°
4
101°