Class 273/274: Roller Overfeed - Duerkopp Adler 271 Service Manual

2.7 Class 273/274: roller overfeed

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Regulation and inspection
The feed roller 3 is automatically lifted when the sewing foot is raised
and for bar-tacking.
This function must be entered in control field 5.
See setting-up instructions, section 12.
The maximum feed length of the intermittent roller overfeed is 7 mm.
The feed length can be adjusted independently of the underfeed with
adjusting wheel 4.
With the basic stitch length at 4 mm the threaded pin 6 limits the
maximum roller-overfeed feed length to 5 mm.
1 = lever raises the feed roller
2 = button automatically lowers feed roller
the function is entered at the control field
Caution: danger of injury
Turn off the main switch.
The feed length may only be adjusted with the sewing machine
switched off.
Adjusting the maximum feed length
–
Remove threaded pin 6.
The maximum feed length is increased to 7 mm.
IMPORTANT
Account must be taken of the machine's basic sewing equipment.
Adjusting the raising and lowering function
–
Set the desired function at the control field.
(See setting-up instructions, section 12).
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