Brother Db2-b714-3 Instruction Manual
Have a look at the manual Brother Db2-b714-3 Instruction Manual online for free. It’s possible to download the document as PDF or print. UserManuals.tech offer 331 Brother manuals and user’s guides for free. Share the user manual or guide on Facebook, Twitter or Google+.
![Page 21
.~
[I] Presser mech~r:'_ism
•
--Approx. 6 mm
f
I. Insert the presser bar 0 from the top of the arm.
2.
Mount the presser bar guide bracket 8 onto the groove in the arm, and then pass the presser bar 0 through the
presser
bar guide bracket G.
3. Mount the washer 8, the presser bar spring 8, and the presser bar spring guide 8, and then tighten the presser
foot adjustment screw
8.
(Mount the thread wiper holder onto the presser bar 0 and secure it with the screw.)
4....](http://img.usermanuals.tech/thumb/13/104668/w64_d_1524652126-brother-db2-b714-3-instruction-manual_d-20.png "Page 21
.~
[I] Presser mech~r:'_ism
•
--Approx. 6 mm
f
I. Insert the presser bar 0 from the top of the arm.
2.
Mount the presser bar guide bracket 8 onto the groove in the arm, and then pass the presser bar 0 through the
presser
bar guide bracket G.
3. Mount the washer 8, the presser bar spring 8, and the presser bar spring guide 8, and then tighten the presser
foot adjustment screw
8.
(Mount the thread wiper holder onto the presser bar 0 and secure it with the screw.)
4....")
![Page 22
[I] Needle and rotary hook timing adjustments
In order for the tip of the rotary hook to catch the loop in the needle thread when the needle rises from the lowest
point. the needle
and rotary hook must be correct.
1 . Needle bar height
•
Reference line
* Turn the pulley slowly. and lower the needle bar 8 to the needle down position. Confirm that the second from
bottom reference line on the needle bar 8 is aligned with the bottom of the needle bar bushing.
• Loosen set screw 8...](http://img.usermanuals.tech/thumb/13/104668/w64_d_1524652126-brother-db2-b714-3-instruction-manual_d-21.png "Page 22
[I] Needle and rotary hook timing adjustments
In order for the tip of the rotary hook to catch the loop in the needle thread when the needle rises from the lowest
point. the needle
and rotary hook must be correct.
1 . Needle bar height
•
Reference line
* Turn the pulley slowly. and lower the needle bar 8 to the needle down position. Confirm that the second from
bottom reference line on the needle bar 8 is aligned with the bottom of the needle bar bushing.
• Loosen set screw 8...")
![Page 23
I~
II] Feed dog height adjustment
•• A
~
.
~ j B ••
A
F1
B
~
Feed dog height
,---Rises in the forward direction ===::l ~ t=:= __..,
r-_ Descends in the forward direction
==:::::1 ~ c::::::::= _./
I. The standard height of the feed dog for sewing thin materials is 0.8 mm. for medium materials 1.0 mm, and for
thick materials
1.2 mm (when the stitch length is set to the maximum).
2. Adjust the feed dog height by loosening the screw 8 when the feed dog 8 is at its height...](http://img.usermanuals.tech/thumb/13/104668/w64_d_1524652126-brother-db2-b714-3-instruction-manual_d-22.png "Page 23
I~
II] Feed dog height adjustment
•• A
~
.
~ j B ••
A
F1
B
~
Feed dog height
,---Rises in the forward direction ===::l ~ t=:= __..,
r-_ Descends in the forward direction
==:::::1 ~ c::::::::= _./
I. The standard height of the feed dog for sewing thin materials is 0.8 mm. for medium materials 1.0 mm, and for
thick materials
1.2 mm (when the stitch length is set to the maximum).
2. Adjust the feed dog height by loosening the screw 8 when the feed dog 8 is at its height...")
![Page 24
IT] Synchronizer adjustment
1 . Position adjustment of the thread trimmer signal
18-22 mm
Synchronizer Adjustment (8707 /8716)
1. Turn off the power of the machine.
(If the hole ICs are to be adjusted. it is important that the power first be turned off.)
2. Remove the synchronizer cover.
3. Rotate the pulley towards you
and stop the needle 5 mm above its lowest point. The lower end oft he magnet 0
must be aligned at this time with the upper edge of the thread-trimmer hole IC...](http://img.usermanuals.tech/thumb/13/104668/w64_d_1524652126-brother-db2-b714-3-instruction-manual_d-23.png "Page 24
IT] Synchronizer adjustment
1 . Position adjustment of the thread trimmer signal
18-22 mm
Synchronizer Adjustment (8707 /8716)
1. Turn off the power of the machine.
(If the hole ICs are to be adjusted. it is important that the power first be turned off.)
2. Remove the synchronizer cover.
3. Rotate the pulley towards you
and stop the needle 5 mm above its lowest point. The lower end oft he magnet 0
must be aligned at this time with the upper edge of the thread-trimmer hole IC...")
![Page 25
11] Thread trimmer adjustment
1 . Replacement of the fixed knife and movable knife
* Turn off the power.
ilstone
Removal of the fixed knife
(I) Tip the machine of its side.
(2.) Remove the screw 0 and the rotary hook position bracket 8.
(3) Remove the screw 8 and the fixed knife 8.
@ If the thread trimmer should need sharpening, sharpen the fixed knife 8 as shown in Fig. A.
Removal
of the movable knife
(I) Use the presser foot lifter lever to lift the presser foot.
(2)...](http://img.usermanuals.tech/thumb/13/104668/w64_d_1524652126-brother-db2-b714-3-instruction-manual_d-24.png "Page 25
11] Thread trimmer adjustment
1 . Replacement of the fixed knife and movable knife
* Turn off the power.
ilstone
Removal of the fixed knife
(I) Tip the machine of its side.
(2.) Remove the screw 0 and the rotary hook position bracket 8.
(3) Remove the screw 8 and the fixed knife 8.
@ If the thread trimmer should need sharpening, sharpen the fixed knife 8 as shown in Fig. A.
Removal
of the movable knife
(I) Use the presser foot lifter lever to lift the presser foot.
(2)...")
![Page 26
(I] Tension release lever adjustment
* Adjust the nut f) so that the thread trimmer
solenoid
0 moves easily for the first 0 -2 mm
(tension release lever does
not operate) and resists
moving for the next 2
-5 mm.
Confirm
that the tension disc 8 opens 0.5-I mm
at this time.
Also, when the solenoid
is not operating, confirm
that the disc is firmly closed.
[!]Thread wiper adjustment
I. Attach the thread wiper bearing 0 so that when the
presser foot
is lifted with the knee...](http://img.usermanuals.tech/thumb/13/104668/w64_d_1524652126-brother-db2-b714-3-instruction-manual_d-25.png "Page 26
(I] Tension release lever adjustment
* Adjust the nut f) so that the thread trimmer
solenoid
0 moves easily for the first 0 -2 mm
(tension release lever does
not operate) and resists
moving for the next 2
-5 mm.
Confirm
that the tension disc 8 opens 0.5-I mm
at this time.
Also, when the solenoid
is not operating, confirm
that the disc is firmly closed.
[!]Thread wiper adjustment
I. Attach the thread wiper bearing 0 so that when the
presser foot
is lifted with the knee...")
![Page 27
~==T=R=O=U=B=L=E=SH====O=O=TI=N=G=G=U=I=D=E=. :::::::::~
[I] Machine head
I Trouble I L...-..-.-1 _cause -------~~ 1~...-----c_heck _I IL--_Solution_____._____....l Page I
r--Improper needle installation 1--Needle bias. height -Reinstall properly
/
-Bent needle, blunt
needle tip, blocked needle hole 1--Needle ......____ Replace needle
/
-Improper feed timing 1--Is material fed when needle f---Adjust timing 21 is in material?
Needle breaks
r-
Refer to .. Needle and Rotary -Needle bar...](http://img.usermanuals.tech/thumb/13/104668/w64_d_1524652126-brother-db2-b714-3-instruction-manual_d-26.png "Page 27
~==T=R=O=U=B=L=E=SH====O=O=TI=N=G=G=U=I=D=E=. :::::::::~
[I] Machine head
I Trouble I L...-..-.-1 _cause -------~~ 1~...-----c_heck _I IL--_Solution_____._____....l Page I
r--Improper needle installation 1--Needle bias. height -Reinstall properly
/
-Bent needle, blunt
needle tip, blocked needle hole 1--Needle ......____ Replace needle
/
-Improper feed timing 1--Is material fed when needle f---Adjust timing 21 is in material?
Needle breaks
r-
Refer to .. Needle and Rotary -Needle bar...")
BROTHER INDUSTRIES, LTD. HEAD OFFICE: No. 35, 9-CHOME, HORITA-DORI, MIZUHO-KU, NAGOYA, JAPAN 467 CABLE: BROTHER NAGOYA, TELEX: BROTHER 4473696J & J59743 13090153B Printed in Japan From the library of: Superior Sewing Machine & Supply LLC