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Durkopp Adler 69-373H Manual

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No. Subject Chapter Correct setting Adjustment
Sewing foot height and
sewing foot lifting
9 Sewing foot lifting with the
lifting lever
3.1 The distance between the lifted
material presser foot and the throat
plate must amount 7 mm.
Shift the material
presser bar
10 Sewing foot lifting with the
knee lever
3.2 When both feet lie on the throat
plate, there should be a clearance
of 1 mm between the lifting lever
and the presser plate.
Set the adjusting
screw.
11 Limitation for the sewing
foot lifting
3.2 The clearance between the
material presser foot and the throat
plate should amount 12 mm.
Adjust the stop.
Opening the thread tension
12 Mechanical opening 4. When the thread tension is opened,
the clearance between the release
plate and the release pin must be
approx. 1 mm.
File or replace the
release pin.
13 Thread controller spring 4.1 Spring travel:
The needle thread is under tension
from the highest position of the
thread lever to the moment the
needle’s eye penetrates the sewing
material.
Spring tension:
Depending on the materials to be
sewn.
Turn the whole
thread tension unit
Turnthetensionpin.
Needle bar
14 Needle bar height 5. In the loop stroke position the hook
point should be located in the
middle of the needle furrow.
Adjust the height of
the needle bar.
Hook settings
15 Loop stroke 6.1 The loop stroke amount to 2 mm. In
the loop stroke position, the hook
point lies at the middle of the
needle. Check using the gauge and
the block.
Turn the hook.
16 Clearance of the hook point
to the needle
6.1 In the loop stroke position, the
clearance between hook point and
the furrow of the needle must be
max. 0.1 mm.
Slide the hook
axially.
Bobbin case holder
17 Bobbin case holder 6.2 The clearance between the bobbin
case holder and the lower part of
the bobbin case should amount
1.5 mm
Set the bobbin case
holder.
Bobbin winder
18 Bobbin fill quantity 8. The bobbin winding operation stops
automatically when the bobbin is
filled up to approx. 0.5 mm below
the edge of the bobbin.
Slight changes:
Bend the release
lever slightly
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