Brother International DB2-B737 Support Question
Brother International DB2-B737 Support Question
Find answers below for this question about Brother International DB2-B737.Need a Brother International DB2-B737 manual? We have 2 online manuals for this item!
Question posted by karen10712 on July 11th, 2014
Needle Only Moves Up And Up Won't Sew
my needle will only sew up and down it won't move, I have just moved it and I'm wondering if I may of knocked something or is there a lever to make it darn
Current Answers
Related Brother International DB2-B737 Manual Pages
Parts Manual - Multi - Page 6
... 23 24 24-1 24-2 24-3 25 26 27
A
Name of Parts
477/9
Upper Shaft
r, r7 99 /, 9 /PL. Thread Take-up Crank Assembly
5- Thread Take-up Lever Hinge Pin Needle Bearing
7 m/PF
Felt
97 L₹4X4
Wick 4X4
97 E₹4 X4
Wick 4X4
F .$*7/6.35947 7:
Screw
if ii 4,
Washer
/SU /WS...
Network Users Manual - English - Page 2
... Servomotor
7
I i Needle position detector (synchronizer)
7
r31 C•ontrol box
9
T• readle
10
O Brush replacement
10
lel Motor brake spacing
11
pi Checking the lamp terminal code
11
Standing work machine
12
pi Application to production control system
13
((OPERATION INSTRUCTION
14
Installation of operation box
14
M Motor and control box (Models DB2-B737 •...
Network Users Manual - English - Page 3
...))
22
M Model DB2-B737 • B747 • B748 • B791 • B793 • B795 • B798 (Type 300B)
22
Model DB2-B738 (Type #4708)
23
TROUBLESHOOTING
24
CHECKINGTHE MOTOR©
25
111 Motor
25
ri Brake
25
CHECKINGTHE MACHINESOLENOID)S)
26
111 Solenoid load of the machine
26
121 Hem sensor
26
3 B737 Machine control system block...
Network Users Manual - English - Page 4
... replace the moving brake plate.
4. There is stopped.
3. FEATURES
1. Easy Maintenance The maintenance is easily done just by the reinforcement sewing speed knob, the speed is controlled from 215 spm to the maximum speed. ©DESCRIPTION OF THE MOTOR
*The Brother DC motor is best suited for the following sewing machines.
[DB2-B7371 4 ,7
[DB2-6738]
4
[DB2-67911 *The...
Network Users Manual - English - Page 5
...
• il El
0
All
\ ,I c T , A 8 C O I
I
A! rSc
I
III:
. 0 m.
t0 RIO@EIMORI
El m './
X
V V
se ES D C ID N ea I
Operation Box E-4
Machine Head to be Applied [DB2-B738] NAME OF EACH COMPONENT
The operation box is best suited to be Applied [DB2-B737 • B747 • B748 • B791 • B793 • B795 • B798]
Power Switch I
O
Synchronizer
0
0
t -rT...
Network Users Manual - English - Page 6
... control box inside because high voltage is applied.
Handle with great care. In setting down the machine head or touching the needle, be sure to turn off the power switch, remove the front cover and confirm the pilot ...
Synchronizer
Solenoid
10/30 Source
Fuse
L
Treadle
DC. Keep away from such machines which make strong noise as high frequency welder for usage. CAUTION: 1.
Network Users Manual - English - Page 7
... sent to the control box 0 and the brakes 0 are applied so that the operation of the sewing machine is sent to the control box Q and the brakes are supplied to run the motor Q at the needle up stop
position set by the treadle unit. .-13RINCIPLE OF CONTROL SYSTEM
0
00
0
OO
)i( 0 0
1. When the power...
Network Users Manual - English - Page 9
...needle up stop hole IC 0 is moved in the reverse direction, the needle bar comes down. ADJUSTMENT D
1 DC Servomotor
Rotating direction
10 mm
0
0
o •
• C)
0
ooS
*Set down the machine...Needle position detector (synchronizer) Model DB2-B747 • B791 • B793 • B795 • B798
*Take off the power switch.
0
Position Adjustment for Needle Down Signal *Turn the machine ...
Network Users Manual - English - Page 10
Use the machine with standard function (without thread trimming) until the synchronizer is turned on and the needle stopped in the direction of normal pulley movement to raise the needle bar 0 stop position. Synchronizer Model DB2-B737 • B748
Higher
Lower
Lower
Higher
0
Needle up position 1. Needle up stop Thin, regular materials: 10 ^ 12 mm Thick materials: 10...
Network Users Manual - English - Page 11
...the TVR 0 (torque setting) is adjusted to increase. 3.
justed to increase. CAUTION: Other volume knobs are already provided on...adjusted to touch the volume knobs by the
maximum sewing speed volume knob, so the VR3 requires no ...machine speed is provided with great care. 131 Control box
Control Box (Model DB2-B737) The high speed volume, backtack stitch volume, power lamp, needle...
Network Users Manual - English - Page 12
...machine starts running at low speed just... by
placing your foot on the treadle or by 80%. Stepping Back Pressure *Loosen the nut Q and turn off the power switch. 2.
When the stepping stroke is changed, the stepping and the stepping back pressures change the position [(a) through (d)] where the treadle spring
is hung on the treadle lever... When the bolt 0 is moved as shown in the order
...
Network Users Manual - English - Page 15
... of the photo coupler. (Use the CN11 plug.) Max. Models DB2-B737 • B747 • B791 • B793. operating voltage: DC20 V or less
gr=O.. operating voltage: DC20 V or less
2 1
Connector
2
Emitter Model B738
Collector
1
*With special connectors (cycle output), connect the machine to the external equipments.
*Output signals are sent from the open...
Network Users Manual - English - Page 16
... turned clockwise, the machine speed increases. Installing on the Machine Head 1. The machine speed can be adjusted from 215 spm up position). The end backtack speed allows no change at the needle up to 3,000 spm. Set the operation box mounting plate 0 on the back
of the power switch 0 . And use (Models DB2-B737 • B747...
Network Users Manual - English - Page 17
...needle moves up to the down every time the switch 0 is same as follows. Press the switch 0 for the fixed stitch sewing... the counter 0. 4. o For Half Stitch Switch *When the machine is done just by pressing the switch again. *When the upper counter switch is...C and D. Box E-4
El For Backtacking 1. 3 Operation box (Models DB2-B737 • B747 • B791 • B793 • B795 •...
Network Users Manual - English - Page 18
... trimming ON (thread trimming performed with a circle in the chart below
o . . . .
When the machine is at the sewing start position after end backtack when the treadle is set to the reverse position.
Thread trimming is performed after thread trimming, the machine does not move even if the actuator is operating, the machine enters the reverse...
Network Users Manual - English - Page 19
...
No.10 Start backtack, fixed stitch and thread trimming
I 1
Al 9 / I V I /B/ Ii"A
Thread trimming activated by reversing
the treadle. No.5 Fixed stitch sewing only
No.6 Start backtack and fixed stitch sewing
Fixed stitch I
N Actuator I correction
I
B/ Ai /
N
Fixed stitch I
No.3 End backtack
No.4 Start/end backtack
A I
B/ /
A
C/ I
/ ID
A
C/ / ID
Thread trimming activated after end...
Network Users Manual - English - Page 24
...-
TH
2
Vf.
.DETAILS OF CONNECTOR PANEL
1 Model DB2-B737 • B747 • B748 • B791 • B793 • B795 • B798 (Type 3O0B)
For standing work
O th`
0 CD CD
Machine head
Presser foot lifter
000
I00©
00® to...]
Side face of control box
No. SYC
6
GND
7
Needle up
8
Encoder
9
10
Operation box GND Din Cin Bin Ain Cout Bout Aout 0 V
DC + 5 V Synchronizer...
Network Users Manual - English - Page 25
... 3
17
PC 1
8
Encoder
8
SCAN 4
18
PC 2
9
SCAN 1
19 DC+ 5 V
10
SCAN 2
20
0 V TH
2
Vf. 2 Model DB2-B738 (Type #47OB)
Potentiometer
Cycle output
2
Needle position
switch
Hem detection
O
Correction
C)SC) 00C)
switch
ArT\ \Li
0
0
0
For standing work
Machine head
Brake
scp()
Presser foot lifter
Cycle output No.
2P connector
1
Collector
2
Emitter
3
4
5
6
Hem...
Network Users Manual - English - Page 29
...ic 2 ROM UPD 27128
Potentionmeter
Ply sensor control
A/D cony. Scan 3 ). Drive Tr
Machine brake Trimmer solenoid Wiper solenoid Reverse feed solenoid Low speed Back tack speed High speed
Auto ... S LED PC1 PC2
Operation panel
Set Ply sensor Input Sewing mode Programme
Start tack End tack Repeat Auto SP Slow start Half step 3 B738 Machine Control System Block Diagram
MD-812-470B
Treadle Front SW...
Network Users Manual - English - Page 30
...B737 Machine Control System Block Diagram
MD-812-300B
Pedal Front SW Rear SW
Actuator SW Presser SW
Synchronizer DN, UP ENC
Hic 1 INP circuit
Transformer
+35V
Power supply
+12V +5V
01V
Hic 3 ENC cont
Motor lock protective
Power ON-OFF detection
)
CPU MB8841
)
Hic 2 Drive circuit
Machine... tack SW Fixed stitches SW Fixed + Trimmer SW Half step SW
Needle Position SW
Counter A, B, C, D
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