Siruba DL7200D-NM1 Instruction Book page 16

9. Adjusting the rotary hook lubrciation amount
hook or
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.
Approx. 70mm
Correct lubrication
Too much
amount
（3）
（4）
Approx. 25mm
Bed
5 - 10mm
Spattered oil
Too little
Less oil More oil
CAUTION
<Checking the lubrication amount>
1. Remove the thread from all points from the thread take
lever to the needle.
2. Use the lifting lever to lift the presser foot.
3. Run the machine at the normal sewing speed for
approximately 10 minutes without sewing any material
(following the same start/stop pattern as when actually
sewing).
4. Place the lubrication amount check sheet (1) to the left of
the rotary hook (2) and hold it there. Then run the s
machine at the normal sewing speed for 10 seconds.
(Any type of paper can be used as the lubrication amount
check sheet (1).)
5. Check the amount of oil which has spattered onto the
sheet.
If adjustment is necessary, carry out the following operations
in "Adjusting the lubrication amount".
NOTE:
If the lubrication amount does not match the correct
amount shown in the illustration at l eft (if the amount of
spattered oil is too much or none at all), turn the adjusting
screw (3) clockwise to fully tighten it, turn it back
counterclockwise by 3 1/2 turns, and then carry out the
following adjustment.
<Adjusting the lubrication amount>
1. Tilt back the machine head.
2.
Remove the rubber cap (3).
3. Turn the adjusting screw (4) to adjust the lubrication
amount.
・ If the rotary hook adjusting screw (4) is turned
clockwise, the lubrication amount becomes greater.
・ If the rotary hook adjusting screw (4) is turned
counterclockwise, the lubrication amount becomes
smaller.
4. Check the lubrication amount again according to the
procedure given in "Checking the lubrication amount"
above.
* Turn the rotary hook adjusting screw (4) and check the
lubrication amount repeatedly until the lubrication
amount is correct.
5. Put the rubber (3) stopper back in place .
6. Check the lubrication amount again after the sewing
machine has been used for approximately two hours.
-15-
-up
ewing