Adjusting The Tension Of Bobbin Thread - Consew 227r-2 Operation And Parts Manual

13. Coordination among the needle,
the thread and the material (Fig. 10)
The thread should be left-handed. Holding the thread
( shown as Fig 10), twist it upward by right hand, if it
changes into twice, it's right-handed, contrary, it's left-
handed.
Needle number is DPxI7, 18#
~
23# . The needle size
should depend on the materials to be sewn. If the thin
needle is used for sewing heavy material,the needle will
be broken easily, and also will cause skip and thread
broken. On the contrary, the material will be destroyed
for the big needle hole. So please select proper needle
according to the material.
14. Threading the needle thread(Fig.U)
Tum the balance wheel to lift the thread take-up lever to
the highest position.
The order as Fig .11: Thread pass-by pin A-Three-eye
thread guide B - Thread tension C - Thread controller
plate D-thread take-up spring E-Upper thread guide F-
Thread take-up lever - Upper thread guide F - Middle
thread guide H-Lower thread guide I-Needle bar thread
guide }-Needle K.
When drawing the bobbin thread, hold the tip If the ne-
edle thread by hand, tum the balance wheel to lower the
needle bar, then lift it to its highest position. Pull the ne-
edle thread and the bobbin thread is drawn up. Put the
tips of the needle thread and bobbin thread toward front
under the presser foot.
15. Adjusting the tension of bobbin
thread and needle thread (Fig. 12)
The tension of the needle thread and bobbin thread
should be suitable. The stitch form shown as (1) is the
best. The abnormal stitch forms shown as(2),(3)will oc-
cur when the tension is tightened or loosened.
(I)Adjusting the tension If bobbin thread.
The tension of bobbin thread should be adjusted accord-
ing to the material.
CDTum the balance wheel by hand to lift the thread
take-up lever up to its highest position.
@ Take down the sliding plate, the adjusting screw (A)
is shown as 1.
®
Turn the adjusting screw (A) clockwise with the
screw-knife to increase the tension.
@) Tum the adjusting screw (A) counter-clock wise to
decrease the tension.
-5-
Thread take-up lever
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