Adjusting The Rotary Hook Lubrication Amount - Brother DB2-DD7100A Instruction Manual

13-10. Adjusting the rotary hook lubrication amount

● Be careful not to touch your fingers or the lubrication amount check sheet against moving parts such as the
rotary hook or the feed mechanism when checking the amount of oil supplied to the rotary hook, otherwise
injury may result.
Use the following procedure to check the amount of oil being supplied to the rotary hook when replacing the rotary hook
or when changing the sewing speed.
NOTE: If changing from the normal rotary hook to the rotary hook RP (lubrication-free rotary hook), a different procedure
should be followed. Refer to page 116 for further details.
Approx. 70 mm
Too much
Approx. 25 mm
q
w
q
5 – 10mm
Spattered oil
Correct Too little
e
Less oil
CAUTION
■ Checking the lubrication amount
1. Run the machine at the normal sewing speed for ap-
proximately 1 minute without sewing any material (fol-
lowing the same start/stop pattern as when actually
sewing).
2. Place the lubrication amount check sheet
the rotary hook
machine at the normal sewing speed for 8 seconds. (Any
type of paper can be used as the lubrication amount check
q
sheet .)
3. Check the amount of oil which has spattered onto the
sheet,
Bed
■ Adjusting the lubrication amount
1. Tilt back the machine head. (Refer to page 8.)
2. Turn the lubrication adjustment screw e approximately 45˚
to adjust the lubrication amount.
● If the rotary hook lubrication adjustment screw
turned clockwise, the lubrication amount becomes
greater.
● If the rotary hook lubrication adjustment screw
turned counterclockwise, the lubrication amount becomes
smaller.
More oil
3. Check the lubrication amount again according to the
procedure given in "Checking the lubrication amount"
above.
* Turn the lubrication adjustment screw
lubrication amount repeatedly until the lubrication amount
is correct.
4. Check the lubrication amount again after the sewing
machine has been used for approximately two hours.
DB2-DD7100A
13. STANDARD ADJUSTMENTS
13. STANDARDEINSTELLUNGEN
13. REGLAGES STANDARD
13. AJUSTES ESTANDARES
w
and hold it there. Then run the sewing
e
q
underneath
e
is
e
is
and check the
112