Brother International DB2-B797 Support Question
Brother International DB2-B797 Support Question
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Question posted by cwjdesign on March 21st, 2012
Bobbin Thread Keeps Bringing
bobbin thread fall from bobbin when I hold it. But when I put in in my bobbin case and insert it in the machine the thread is do tight you can't pull. When I turned the bobbin case it kind of catches. I was sewing and I heard a thumb I thought I broke my needle but I didn't now it won't sew. Any suggestion. I would appreciate any ideas.
Current Answers
Answer #1: Posted by UsPinay on March 21st, 2012 10:20 PM
UsPinay
Member since:
January 23rd, 2012 Points: 183,330
Member since:
January 23rd, 2012 Points: 183,330
You must set the bobbin tension :
- Make sure that bobbin case and spring are clean before beginning this procedure. This is to ensure consistency once proper tension is set.
- Install a new bobbin of correct size into bobbin case.
- Slide the thread under the tension spring.
- Pull bobbin from under hole of tension spring. If bobbin case has a middle thread guide or pigtail, do not thread through at this time.
- Pull approx. 50mm of bobbin.
- Hold the bobbin by the thread hanging out of the case to check the tension. The ideal tension should be when the bobbin does not move, or is very slow releasing thread. If the bobbin falls to the ground, it is too loose and you will need to tighten the screw (on the tension spring). If the bobbin does not fall, loosen the screw until the bobbin is just barely holding its own weight. Note: If a tension gauge is used, the correct bobbin tension is 20-25g.
- Adjust the tension of the upper thread & bobbin thread for better balance when sewing. The industry standard assumes 1/3 of the bobbin thread is visible in the back of a sewout.
Hope this helps…
Posted by USPinay
Related Brother International DB2-B797 Manual Pages
Parts Catalog - Page 2
... A-34-2 A-34-3
Name of Parts
Oil Cap Screw Face Plate Thread Retainer Screw Screw Thread Guide Screw Thread Tack -up Spring Tension Release Pin Tension Bracket Screw Screw Needle Plate... No.
No. No. Machine Body
4 5 33 31 t
34-2 34-3-8
14
15 16
17
8 9 10 11
40
12
13
14BROTHER,
31 C4
oyl 4Z3-30
33
29
28 c4-27
26
e
25 24
---23
C
-22
21
1 te
• DB2 6797 20 19
Ref. ...
Parts Catalog - Page 4
... of Parts Screw
C 19-1 Collar
C-19.2 Screw
C-20 C-21 C-22
C 23
C-24 C-25 C-26
Lower Shaft Lower Shaft Bushing Left Rotary Hook Assembly Bobbin Case Holder Position Bracket Screw Bobbin Bobbin Case Assembly
C 27 1 Nut
C 27 2 Center Screw
C-28-1 Feed Lifting Arm
C 28 2 Screw C-29 Feed Lifting Rock Shaft
Q'ty Parts No. RNeo. C-28 Feed...
Parts Catalog - Page 5
...-0-01
1 117116-0.01
1 150433-0-01
1 140004-0-01 1 111237-0.01
1 145465-0-01
B-6
1 147491-0-01 Thread
2 116735-0-00 Tack-up Lever
1 147341-0-01 Assembly
1
147323-0-01
1 013761-0-10
1 1 110367-0-01
...009670-5-12
1 102631-0-00 1 109205-0-00
2 013770-7-10
104464-0-01
I 2
B-46-1 Gear Case Lower
1
B-46-2 Screw
2
148914-0.00 0137614/0
___--013770-7-10
--------013770-7-10
B-45 Lower...
Parts Catalog - Page 8
...Parts
Z-13-16 Spring
Z-13-17 Bobbin Presser Arm
Z-13-18 Pin
Z-13-19 Bobbin Presser Arm Bracket
Z-13-20 Screw
Z 13
Bobbin Winder Wheel Stopper
21Holder
Z-13-22 Bobbin Winder Wheel Stopper
Z-14 Screw
Z-15...100366-0-02
117970-0-01 100657-0-01
100401-0-01 145446-0-01
100659-0-01
Assembly No.
2.13 Bobbin Winder Assembly
117963-0-01
f. "G
13-2240. 0
13
1 6 14 r-13
-p-a-
13-'3
13-15
...
Specifications - Page 1
...
38 mm
73 mm
8 mm
15 mm
1.2 mm
2 - 5 mm
DP × 17 #23
Large rotary hook
Large rotary hook for thread trimming
476 x 178 mm
266.5 x 131 mm
2000.7
DB2−B797, B798 1/2 DB2-B797 B798
Single Needle Top and Bottom Feed Lock Stitcher with Large Hook Single Needle Top and Bottom Feed Lock Stitcher...
Specifications - Page 2
... B798
Option gauge B797, B798
Feet for piping
Walking foot
Presser foot
151847-001 151848-001 151849-001
6.4 mm (1/4")
7.9 mm (5/16") 9.5 mm (3/8")
151850-001
Narrow type feet for small parts
Walking foot
Presser foot
151851-001
151852-001
Reverse feet
Walking foot
Presser foot
S04501-001
S04502-001
DB2−B797, B798 2/2
2000...
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