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Manuals
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Brother Manuals
Sewing Machine
DB2-B721
Instruction manual
Brother DB2-B721 Instruction Manual
Single needle needle feed lock stitcher
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Instruction manual
(91 pages)
,
Instruction manual
(91 pages)
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Contents
Table of Contents
Names of Major Parts
Machine Specifications
Optional Parts (B722/B724)
Work Table
Motor (B721/B723)
Installation
Installing the Oil Pan
Installing the Machine Head
Installing the Knee Lifter Assembly (Except -900)
Installing the Belt
Installing the Bobbin Winder
Installing the Belt Cover
Installing the Cotton Stand
Ground Wire Connections (8721/8723)
Lubrication
Checking the Machine Pulley Rotating Direction
Preparation before Sewing
Installing the Needle
Removing the Bobbin Case
Winding the Lower Thread
Installing the Bobbin Case
Threading the Upper Thread
Adjusting the Stitch Length
Using the Thread Wiper (8722/8724-400, 900, Option)
Sewing
Sewing
8Acktacking
Thread Tension
Adjusting the Thread Tension
Adjusting the Presser Foot Pressure
Adjusting the Trailing Length after Thread Trimming (8722/8724)
Cleaning
Standard Adjustments
Adjusting the Thread Tension Spring
Adjusting Arm Thread Guider
Adjusting the Presser Foot Height
Adjusting the Feed Dog Height
Adjusting the Feed Dog Angle
Adjusting the Needle Bar Height
Adjusting the Needle and Feed Mechanism Timing
Adjusting the Needle and Rotary Hook Timing
Checking the Rotary Hook and 8-Case Holder Position Bracket Clearance
11-10.Adjusting the Upper Shaft and Rotary Hook Lubrication Amount
11-11.Adjusting the Synchronizer (8722/8724)
Replacing the Fixed Knife and Movable Knife (B722/B724)
Replacing the Fixed Knife
Replacing the Movable Knife
Troubleshooting
Halt
Hauptteile
Technische Daten
Sonderzu8Eh0Rteile (8722/8724)
Nahtisch
Motor (8721/8723)
Montage
Montage der Olwanne
Montage des Maschinenoberteils
Montage der Kniehebel (Auber -900)
Riemenmontage
Montage des Spulers
Montage des Riemenschutzes
Montage des Spulentragers
Anschlub des Erdungskabels (8721/8723)
Schmierung
Kontrolle der Nahmaschinen-Riemenscheibendrehrichtung
Vor8Ereitungen zum Nahen
Einsetzen der Nadel
Herausnehmen der Spulenkapsel
Aufwickeln des Unterfadens
Einsetzen der Spulenkapsel
Einfadeln des Oberfadens
Einstellen der Stichlange
Verwendung des Fadenwischers
Sonderausrustung)
Hahen
Hahen
Verriegeln
Fadenspannung
Einstellen der Fadenspannung
Einstellen des Stoffdruckerfubdrucks
Einstellen der Verbleibenden Fadenlange nach dem Fadenabschneiden (8722/8724)
Reinigung
Standardeinstellungen
Einstellen der Fadenspannungsfeder
Einstellen der Armfadenfuhrung R
Einstellen der Stoffdruckerfubhohe
Einstellen der Transporteurhohe
Einstellen der Transprteurneigung
Einstellen der Nadelstangenhohe
Einstellen der Nadel- und Transporteursynchronisation
Einstellen der Nadei-Greifersynchronisierung
Prufung des Abstands zwischen Greifer und Spulenkapselpositionshalterung
11-10.Einstellen der Schmierung der Oberen Welle und des Drehgreifers
11-11.Einstellen des Synchronisators (8722/8724)
Ersetzen des Feststehenden uno des 8Eweglichen Messers (8722/8724)
Ersetzen des Feststehenden Messers
Ersetzen des Beweglichen Messers
Fehlersuche
Table des Matieres
Specifications de la Machine
Pieces en Option (8722/8724)
Moteur (8721/8723)
Installation du Reservoir D'huile
Installation de Ia Tete de Machine
Installation de !'Ensemble de Releveur Au Genou (Sauf -900)
Installation de Ia Courroie
Installation du Bobineur de Canette
Installation du Couvercle de Courroie
Installation de Ia Broche Porte- Bobine
Raccord du Cable de Mise a Ia Terre (8721/8723)
Lubrification
Verification du Sens de Rotation de Ia Poulie de Machine
Preparatifs Avant la Couture
Installation de J'aiguille
Retrait de Ia Boite a Canette
8Obinage du Fil Inferieur
Installation de Ia Boite a Canette
Enfilage du Fil Superieur
Reglage de Ia Longueur de Point
Utilisation du Tire-Fils (8722/8724-400, 900, Option)
Couture
Couture
Point D'arret
Tension du Fil
Reglage de Ia Tension du Fil
Reglage de Ia Pression du Pied Presseur
Reglage de Ia Longueur de Fil Residue! Apres Ia Coupe des Fils (8722/8724)
Nettovage
Reglages Standard
Reglage du Ressort de Tension du Fil
Reglage du Guide-Fil D du Bras
Reglage de Ia Hauteur du Pied Presseur
Reglage de Ia Hauteur de Ia Griffe D'entrainement
Reglage de J'angle de Ia Griffe D' Entrainement
Reglage de Ia Hauteur de Ia Barre Aiguille
Reglage de Ia Synchronisation de L'aiguille Et du Dispositif D' Entrainement
Reglage de Ia Synchronisation de L'aiguille Et du Crochet Rotatif
Verification de L'ecart entre Le Crochet Rotatif Et Le Support de Position de Boite a Canette
11-10.Reglage de Ia Quantite de Lubrification de L'arbre Superieur Et du Crochet Rotatif
11-11.Reglage du Synchroniseur (8722/8724)
Remplacement du Couteau Fixe Et du Couteau Mobile
Rem Placement du Couteau Fixe
Remplacement du Couteau Mobile
Resolution des Problemes
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Table of Contents
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Names of Major Parts
3
Machine Specifications
4
Optional Parts (B722/B724)
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Summary of Contents for Brother DB2-B721
Page 1
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Page 16: Table Of Contents
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Page 17
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Page 18
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Page 19
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Page 20: Names Of Major Parts
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Page 21
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Page 22: Machine Specifications
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Page 23
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Page 24: Optional Parts (B722/B724)
From the library of: Superior Sewing Machine & Supply LLC...
Page 25
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Page 26: Work Table
From the library of: Superior Sewing Machine & Supply LLC...
Page 27: Motor (B721/B723)
From the library of: Superior Sewing Machine & Supply LLC...
Page 28: Installation
From the library of: Superior Sewing Machine & Supply LLC...
Page 29: Installing The Oil Pan
From the library of: Superior Sewing Machine & Supply LLC...
Page 30: Installing The Machine Head
From the library of: Superior Sewing Machine & Supply LLC...
Page 31: Installing The Knee Lifter Assembly (Except -900)
From the library of: Superior Sewing Machine & Supply LLC...
Page 32: Installing The Belt
From the library of: Superior Sewing Machine & Supply LLC...
Page 33: Installing The Bobbin Winder
From the library of: Superior Sewing Machine & Supply LLC...
Page 34: Installing The Belt Cover
From the library of: Superior Sewing Machine & Supply LLC...
Page 35
From the library of: Superior Sewing Machine & Supply LLC...
Page 36
From the library of: Superior Sewing Machine & Supply LLC...
Page 37: Installing The Cotton Stand
From the library of: Superior Sewing Machine & Supply LLC...
Page 38: Lubrication
From the library of: Superior Sewing Machine & Supply LLC...
Page 39: Checking The Machine Pulley Rotating Direction
From the library of: Superior Sewing Machine & Supply LLC...
Page 40: Preparation Before Sewing
From the library of: Superior Sewing Machine & Supply LLC...
Page 41: Removing The Bobbin Case
From the library of: Superior Sewing Machine & Supply LLC...
Page 42: Winding The Lower Thread
From the library of: Superior Sewing Machine & Supply LLC...
Page 43: 8Obinage Du Fil Inferieur
From the library of: Superior Sewing Machine & Supply LLC...
Page 44: Installing The Bobbin Case
From the library of: Superior Sewing Machine & Supply LLC...
Page 45: Threading The Upper Thread
From the library of: Superior Sewing Machine & Supply LLC...
Page 46: Adjusting The Stitch Length
From the library of: Superior Sewing Machine & Supply LLC...
Page 47: Using The Thread Wiper (8722/8724-400, 900, Option)
From the library of: Superior Sewing Machine & Supply LLC...
Page 48: Sewing
From the library of: Superior Sewing Machine & Supply LLC...
Page 49: Sewing
From the library of: Superior Sewing Machine & Supply LLC...
Page 50: Thread Tension
From the library of: Superior Sewing Machine & Supply LLC...
Page 51: Adjusting The Presser Foot Pressure
From the library of: Superior Sewing Machine & Supply LLC...
Page 52: Tension Du Fil
From the library of: Superior Sewing Machine & Supply LLC...
Page 53: Reglage De Ia Pression Du Pied Presseur
From the library of: Superior Sewing Machine & Supply LLC...
Page 54: Cleaning
From the library of: Superior Sewing Machine & Supply LLC...
Page 55
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Page 56
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Page 57
From the library of: Superior Sewing Machine & Supply LLC...
Page 58: Standard Adjustments
From the library of: Superior Sewing Machine & Supply LLC...
Page 59: Adjusting The Thread Tension Spring
From the library of: Superior Sewing Machine & Supply LLC...
Page 60
From the library of: Superior Sewing Machine & Supply LLC...
Page 61: Adjusting Arm Thread Guider
From the library of: Superior Sewing Machine & Supply LLC...
Page 62: Adjusting The Presser Foot Height
From the library of: Superior Sewing Machine & Supply LLC...
Page 63: Adjusting The Feed Dog Height
From the library of: Superior Sewing Machine & Supply LLC...
Page 64: Adjusting The Feed Dog Angle
From the library of: Superior Sewing Machine & Supply LLC...
Page 65: Adjusting The Needle Bar Height
From the library of: Superior Sewing Machine & Supply LLC...
Page 66: Adjusting The Needle And Feed Mechanism Timing
From the library of: Superior Sewing Machine & Supply LLC...
Page 67: Reglage De Ia Synchronisation De L'aiguille Et Du Dispositif D' Entrainement
From the library of: Superior Sewing Machine & Supply LLC...
Page 68: Adjusting The Needle And Rotary Hook Timing
From the library of: Superior Sewing Machine & Supply LLC...
Page 69: Checking The Rotary Hook And 8-Case Holder Position Bracket Clearance
From the library of: Superior Sewing Machine & Supply LLC...
Page 70: 11-10.Adjusting The Upper Shaft And Rotary Hook Lubrication Amount
From the library of: Superior Sewing Machine & Supply LLC...
Page 71: 11-11.Adjusting The Synchronizer (8722/8724)
From the library of: Superior Sewing Machine & Supply LLC...
Page 72: 11-11.Reglage Du Synchroniseur (8722/8724)
From the library of: Superior Sewing Machine & Supply LLC...
Page 73: Replacing The Fixed Knife And Movable Knife (B722/B724)
From the library of: Superior Sewing Machine & Supply LLC...
Page 74: Replacing The Movable Knife
From the library of: Superior Sewing Machine & Supply LLC...
Page 75: Troubleshooting
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Page 76
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Page 77
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Page 78
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Page 79: Fehlersuche
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Page 80
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Page 81
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Page 82
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Page 83: Resolution Des Problemes
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Page 84
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Page 85
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Page 86
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Page 91
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This manual is also suitable for:
Db2-b723
Db2-b722
Db2-b724
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