White 870 manual Adjusting, Tension

12

			ADJUSTING
Always	adjust the
		upper				tension
automatically		released	thread
			when	it	is	raised.

THE	TENSION
with the	presser foot

down,

as the

tension

is

To

increase

the

tension

turn

dial

(A)

(Fig.

1?)

to

the

To

decrease,

turn

to

the

left. The

higher

the

number

on

Set

numbers

to

indicating

pointer

(B).

Before

adjusting

lower

tension,

be

sure

the

machine

is

necessary to

change

the

bobbin

tension,

turn

small

screw

case

clockwise

to

tighten,

counterclockwise to

loosen.

right,		or		clockwise.
the	dial,
			the tighter		the	tension.
threaded				correctly.	When it is
(Fig.		18)
				on side of	the	bobbin

When

the

tensions

are

properly

balanced,

a

perfect stitch

will

threads

be

formed

interlocking

in

the

center

of

the

fabric.(Fig.

19.)

with both

When	the
thread	which
When	the
thread	which

upper		tension			is	too	tight		the		lower
is
	lying		flat
				on		the top		of
									the		fabric.
upper		tension			is	too	loose,		the		upper
is
	lying		flat
				under the				fabric.
										Fig. 21.

thread		is	pulled	up	over
Fig.	20.

thread forms loops over

the	upper
the	lower

Fig.

17

Fig.

19

Fig.

20

Fig.

21