SINGER W231 - Manual (Page 12)

PudJiiuitoH, (PfieAde^ ^oot PnoAiMne. Pe^niaton,]
11
The PUSHBUTTON DARNER is located on top of the machine
directly over the presser bar (FiR. 19 & 20). It regulates the
pressure of the presser foot for sewing very heavy material, very
thin material, and for darning and embroidering.
1. To eliminate the pressure of the presser foot for darning,
embroidering and inonogramming, push down the OUTSIDE
RING of the PUSHBUTTON DARNER (A) and the material
can be moved by hand while the machine is running at a
fair speed. (Fig. 19)
2. To increase the pressure of the presser foot for sewing very
heavy material, normal material and very thin material, push
the PUSHBUTTON DARNER (B) gradually down to increase
the pressure of the presser foot accordingly. (Fig. 20)
Fig. 19
Fig. 20