Thread Cutter; Thread Cutter Height, Position Of The Counter Knife - Dürkopp Adler 838 Service Instructions Manual

6.

Thread cutter

6.1

Thread cutter height, position of the counter knife

32
Standard checking
1. The distance measure between the thread-pulling knife (5) and the
hook should be (A) = 0.2 mm.
2. The distance measure between the counter knife (6) and the
thread-pulling knife (5) should be (B) = 0.3 to 0.5 mm.
3. The knives should have contact at the distance (C) = 1 to 2 mm.
5
3
2
1
–
Loosen screws (1), (2), (3) and push the holder (4) downwards.
–
Slightly tighten screw (2), that sits on the surface of the shaft.
–
Tighten screw (3) until the distance measure (A) = 0.2 mm is set
and thus rule 1 is accomplished.
–
Tighten screw (2) and afterwards also screw (1).
–
Dismount the column protection.
–
Loosen screws (7) and (4). Set the distance measure (B) = 0.3 to
0.5 mm according to rule 2.
–
Slightly tighten screw (4).
–
Turn the handwheel, so that the index points to degree "270" .
–
Turn the thread-pulling knife (5) manually to set it to the distance
measure (C) = 1 to 2 mm and adjust the counter knife (6)
accordingly until the knives touch smoothly (without any pressure).
–
Tighten screws (7) and (4) and check whether the knives touch at
the distance (C).
6
7
4
C