Brother 2340CV - Manual (Page 5)

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• An example where adjustment is required
When stretch material is sewn without using the differen­
tial feed, the material will be wavy.
To make the material more smooth, adjust the feed ratio
from 1.0 toward 2.0.
(The feed ratio required depends on the elasticity of the
material.)
The more elastic the material, the further toward 2.0 the
differential feed ratio should be set. Test sew with a scrap
of the fabric to find the correct adjustment.
CAUTION
When sewing thick non-stretchabie materiai such
as denim, do not use the differentiai feed as it
may damage the fabric.
Presser foot pressure
The pressure of the presser foot can be adjusted by
turning the pressure adjustment screw at the top left
of this machine. Since this machine has already been
adjusted to a pressure suitable for light to medium
fabrics, no further adjustment is necessary except
when sewing on very heavy or very light materials.
Usually, when sewing on very light materials, the
presser foot pressure should be loosened. When
sewing very heavy materials, the presser foot pres­
sure should be tightened.
©Pressure adjustment screw
©Less pressure
©More pressure
©Pressure adjustment screw
©(Standard height for medium material)
Needle
NOTE:
When front needles are inserted correctly you can
see the top of the needle in the window (®) above
each needle position.
CAUTION ---------------------------- U A U I I U N --------------------------------
Always be sure to turn off the power before
carrying out this operation.
------------------------ CAUTION --------------------- ^
Do not drop the needle and needle set screw
in the machine, otherwise it may be dam­
aged.
This machine uses a standard home sewing machine
needle.
The recommended needle is SCHMETZ 130/705H
(90/#14).
To remove the needle
(1) Turn the main power switch to the OFF position.
(2) Turn the hand wheel counter-clockwise by hand until
the needle is at its highest position.
(3) Loosen the needle set screw with hexagonal wrench
and remove the needle.
To insert the needle
(1) Turn the main power switch to the OFF position.
(2) Turn the hand wheel until the needle bar is at its
highest position.
(3) Hold the needle with its flat side away from you and
insert it up as far as it will go.
(4) Tighten the needle set screw securely with the hex­
agonal wrench.
©Needle set screw
©Tighten '
©Loosen
©Hexagonal wrench
©Window
©Left needle
©Center needle
©Right needle
NOTE:
Countermeasures for material breakage.
It can reduce the occurrence of material breakage by using SCHIMETZ 130/705H SUK (90/#14) BALL POINT.