Duerkopp Adler 271 Operating Instructions Manual - Page 15
Browse online or download pdf Operating Instructions Manual for Sewing Machine Duerkopp Adler 271. Duerkopp Adler 271 18 pages. Preface and general safety notes
Also for Duerkopp Adler 271: Fitting Instructions (2 pages)
Print Page
3.5 Regulating the Needle Thread Tension
3.6 Thread Regulator
Pre-tensioning for Thread Trimming
For the sure functioning of the thread trimming with
opened main tension 4 a small residual tension of the
needle thread is required.
This residual tension is achieved by pre-tensioning 3. At
the same time it influences the length of the cut needle
thread end. (Starting thread for the next seam.)
Short starting thread = tighten the knurled nut 3.
As base position applies:
Front of the knurled nut and bolt flush.
Greater adjustments of the pre-tensioning makes a
readjustment of the main tension necessary.
Main tension
Pre-tensioning 3 and main tension 4 should give the
recommended needle thread tension of e.g. 80g.
Set the main tension 4 accordingly.
With the thread regulator 6 the needle thread quantity
required for stitch building can be regulated. The setting
is dependent on stitch length, material thickness and
thread characteristics.
Note:
Only a precisely set thread regulator assures an optimal
sewing result.
The needle thread loop should glide over the hook
without excess and with little tension.
Loosen screw 9 and set the regulator accordingly.
The vertical wire 7 serves as a setting aid in conjunction
with the scale 8.
6
5
7
8
9
4
17