Brother LK3-B448E instruction manual Needle drops into, Hole of the button

Page 77

18. Troubleshooting

Problem

Cause

 

Check

 

 

 

Remedy

Page

 

 

 

 

Sharpen or replace the

 

Upper thread is not trimmed.

Thread jamming

Poor seam finish on reverse side of material.

Incorrect thread tightness

Button breaks.

Fixed knife is blunt.

Movable knife does not pick up the thread.

The movable knife does not pick up the thread because of skipped stitches at the sewing end.

Movable knife position is incorrect.

Sub-tension is too weak.

Thread takeup spring tension and height are incorrect.

Incorrect needle and rotary hook timing

Shuttle race thread guide is not separating the threads.

Shuttle race thread guide is not separating the threads.

Upper thread is not properly tight.

Uneven upper thread length

Upper thread tension is too weak.

Lower thread tension is too weak.

Thread takeup spring tension and height are incorrect.

Needle is striking the button.

Fixed knife blade

Shuttle race thread guide position

Needle bar lift amount

Skipped stitches at sewing end

Movable knife position

Sub-tension

Thread takeup spring tension and height

Needle bar lift amount

Shuttle race thread guide position

Shuttle race thread guide position

Upper thread tension

Upper thread length

Upper thread tension

Lower thread tension

Thread takeup spring tension and height

Needle down setting

 

fixed knife.

 

 

 

 

 

Adjust the position of

43

 

the shuttle race thread

 

guide.

 

 

 

 

 

Adjust the needle bar lift

41

 

amount.

 

 

 

 

 

 

 

 

 

Refer to "Skipped

 

 

stitches occur".

 

 

 

 

 

 

 

 

Adjust the position of

45

 

the movable knife.

 

 

 

 

 

 

 

 

 

Turn the sub-tension

27

 

nut to adjust the

 

tension.

 

 

 

 

 

Adjust the tension and

30

 

height of the thread

 

takeup spring.

 

 

 

 

 

Adjust the needle bar

41

 

lift amount.

 

 

 

 

 

 

 

 

 

Adjust the position of

43

 

the shuttle race thread

 

guide.

 

 

 

 

 

Adjust the position of

43

 

the shuttle race thread

 

 

tension.

 

 

 

 

 

Adjust the upper

29

 

thread tension.

 

 

 

 

 

 

 

 

 

Adjust the sub-tension.

27

 

 

 

 

 

 

 

 

Adjust the upper

29

 

thread tension.

 

 

 

 

 

 

 

 

 

Adjust the lower thread

29

 

tension.

 

 

 

 

 

 

 

 

 

Adjust the tension and

30

 

height of the thread

 

 

takeup spring.

 

 

 

 

 

Adjust so that the

40,46

 

needle drops into the

 

 

hole of the button.

 

70

LK3-B448E MARKII/BA-16

Page 76 Page 78
Image 77
Page 76 Page 78
Contents LK3-B448E Indications SymbolsEnvironmental requirements Lightning may cause problems with correct operationIii SewingLK3-B448E MARKII/BA-16 Contents Changing functions using the DIP switches Name of each part Name of each partSpecifications SpecificationsSpecifications NeedleProgram list Specifications Program No Optional parts Installation InstallationPower table Installing the motor pulley Installing the motorInstalling the control box Installing the cushions Installing the oil panInstalling the head rest Installing the machine headInstalling the control box for vibrating bowl Installing the liquid cooling tank, optionalInstalling the vibrating bowl Installing the shooter Installing the button feederP11 Connecting the cordsControl box for vibrating bowl connection Installation Button feeder connectionPower switch connector control box Installing the button feeder coverInstallation Power switch connection Connecting the ground wire Installing the operation panelInstalling the V-belt Installing the foot switch Installing the belt coverInstalling the spool stand Installing the eye guard Installing the motor coverAdjustment by the accessory spring Lubrication LubricationLubrication points Draining the oil Applying greaseOperation OperationName and function of each operation panel item S E TY-SCALE Setting the program number Operating procedureSetting the X-scale and Y-scale Setting the sewing speedOperating the vibrating bowl Operating the button feederTo ensure safety during use When checking by operating only the feed mechanismChecking the sewing pattern Checking the sewing patternCorrect use Installing the needleSelecting the needle and thread Threading the upper threadWinding the lower thread Lower thread tension Upper thread tension Replacing the bobbin case and threading the threadThread tension reference guide Thread take-up amount Adjusting arm thread guide RBefore starting sewing SewingSewing Cleaning the rotary hook Maintenance and inspectionCleaning the control box air inlet port Maintenance and inspectionChecking the needle Cleaning the eye guardWipe the eye guard clean with a soft cloth Tileing back the machine head AdjustmentsAdjustments Adjusting the needle bar lift amount Adjusting the needle bar heightAdjusting the shuttle race thread guide Adjusting the driver needle guardAdjusting the needle clearance Adjusting the movable knife Adjusting the thread take-up amountAdjustments Replacing the movable knife and fixed knife Adjusting the button clamp lift amount Adjustment Adjusting the holding pressureAdjusting the position of the button holder Adjusting the button clamp height Adjusting the thread wiper Adjusting the needle up stop positionIf buttons are not fed properly, check the following Adjusting the vibrating bowlAdjustment for excess buttons in the button shooter Button clamp adjustment Button replacementIf button hole arrangements differ Adjustment Adjustment when the button thickness changesAdjusting the button carrier plate Adjustment Adjusting the feeder position adjustment Horizontal feed position Adjustment Adjusting the needle locationButton hole gap Vertical feed positionReplacement the V-belt Sewing machine Belt P1 P2 P3 P4 Checking the input sensor and DIP switch inputChecking the input voltage Moving stitch patterns Using the bobbin thread counter Using the countersUsing the production counter Using the countersUsing user programs Using user programsRecording a user program P1 P2Clearing the user programs Using user programs Using a user programUsing the cycle sewing function Using the cycle sewing functionPress the P1 switch o Recording a cycle sewing programClearing a cycle sewing program Using the cycle sewing function Using a cycle sewing programOperation panel DIP switches Changing functions using the DIP switchesSetting the presser mode Changing functions using the DIP switchesDIP switches inside the control box Changing special functions using the memory switches Clearing all memory settingsMemory switches 00 0F P1 P2 P3 P4Memory switches 30 4F Memory switches 20 2FTable of error codes Table of error codesPanel display Text display Errors generated when optional equipment is connectedSegment LED alphabet LK3-B448E MARKII/BA-16 Troubleshooting Troubleshooting40,46 Hole of the button Needle drops into15-1, Naeshiro-cho, Mizuho-ku, Nagoya 467-8561, Japan. Phone

LK3-B448E specifications

The Brother LK3-B448E is a versatile and innovative sewing machine designed to meet the needs of both home sewers and professionals alike. This comprehensive machine is especially advantageous for users who want to experiment with intricate designs and achieve high-quality results with ease.

At the core of the LK3-B448E lies its advanced computerized technology, which facilitates a seamless sewing experience. The machine features a user-friendly interface, making it accessible for not just experienced sewists but also beginners. The LCD display provides clear visibility of settings, stitch patterns, and design options, ensuring that users have full control over their projects.

One of the standout features of the LK3-B448E is its extensive library of built-in stitch patterns. With over 100 different stitches to choose from, including decorative, utility, and quilting stitches, users can easily customize their sewing to suit any project. In addition to the built-in stitches, this machine supports the use of embroidery patterns and designs, expanding creative possibilities significantly.

The LK3-B448E also incorporates advanced sewing technologies, such as automatic needle threading and a drop-in bobbin system. These features simplify the setup process, allowing users to spend more time sewing and less time managing technicalities. Furthermore, the machine offers adjustable stitch length and width, enabling personalized settings that cater to various fabric types and sewing tasks.

Another remarkable characteristic of the LK3-B448E is its adjustable presser foot pressure. This allows for better control, whether working with delicate fabrics or thicker materials. The machine’s speed controls help manage sewing speed, providing additional comfort for users as they tackle intricate patterns or detailed designs.

The LK3-B448E also supports USB connectivity, enabling users to transfer new designs and updates effortlessly. This feature ensures that the machine remains relevant with cutting-edge patterns and functionalities, extending its lifespan and usability.

In conclusion, the Brother LK3-B448E combines user-friendly design with advanced technology, offering a comprehensive sewing experience. Its extensive features, coupled with customizable settings, make it an ideal choice for both novice and experienced users looking to enhance their sewing projects. With the LK3-B448E, creating beautiful garments and intricate designs is a straightforward and enjoyable process.
Top Page Image Contents