Sharpening Or Replacing The Blades - Duerkopp Adler 271 Service Manual

10.3 Sharpening or replacing the blades

2
6
46
1
Regulation and inspection
The blade should cut reliably with the minimum possible pressure.
Caution: danger of injury
Turn off the main switch.
Replace the blade with the sewing machine switched off.
Replacing the upper blade
–
Undo screws 4 and 5.
–
Remove upper blade 2 or 3.
–
Sharpen the upper blade.
IMPORTANT
Only the surface marked with the arrow may be sharpened.
–
Replace the upper blade.
–
Retighten screws 4 and 5.
–
Carry out a manual cutting test and if necessary re-adjust the
upper blade as described in section 9.
–
Check the blade overlap at TDC.
If sharpening the upper blade has made it too short (the tip no
longer makes contact with the lower blade) a new blade must be
fitted.
Replacing the lower blade
–
Remove the slider, foot and needle plate.
–
Undo 2 screws 1.
–
Remove lower blade 6.
–
Sharpen the lower blade.
IMPORTANT
Only the surface marked with the arrow may be sharpened.
–
Replace lower blade 6.
The cutting edge must make contact with the upper blade.
–
Retighten 2 screws 1.
–
Replace the slider, foot and needle plate.
2 3
4
5