Brother rh-918a manual Troubleshooting, Problem Cause Remedy Thread breaks, Skipped stitches occur

Page 87

13. TROUBLESHOOTING

13. TROUBLESHOOTING

If there is a problem with operation, first check that the threads are correctly threaded and that the needle is correctly installed.

CAUTION

Turn off the power switch and disconnect the power cord before carrying out troubleshooting, otherwise the machine will operate if the start switch is pressed by mistake, which could result in injury.

MACHINE HEAD

Problem

 

Cause

 

 

 

 

Remedy

 

Page

 

 

 

 

 

 

 

 

 

 

Thread breaks.

Thread

tension

control

nut

Adjust

to

an

appropriate

47

 

pressure is too strong.

 

pressure.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Thread is of poor quality.

 

Use a better-quality thread.

 

 

 

 

 

 

Thread is too thick for the

Use a differently-size needle.

 

 

needle.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Needle groove or needle hole

Replace with a new needle.

28

 

are not smooth.

 

 

 

 

 

 

 

 

 

 

 

 

 

Needle and looper adjustment is

Adjust the needle bar height or

55

 

incorrect.

 

 

 

 

the looper and spreader height.

 

 

 

 

 

 

 

 

 

Needle, looper, throat plate or

Repair the damage with an

 

 

oilstone or buffer, or replace the

 

 

thread path is damaged.

 

damaged part.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Skipped stitches occur.

Thread

tension

control

nut

Adjust

to

an

appropriate

 

 

pressure is too strong or too

pressure.

 

 

 

47

 

weak.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Needle point is broken or bent.

Replace with a new needle.

28

 

 

 

 

 

 

 

 

Needle and looper adjustment is

 

 

 

 

 

 

incorrect,

or

clearance is

Adjust correctly.

 

56

 

incorrect.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Needle

and

needle

guard

Adjust correctly.

 

59

 

adjustment is incorrect.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Repair with an oilstone or

 

 

Looper tip is blunt.

 

 

replace the looper with a new

 

 

 

 

 

 

 

one.

 

 

 

 

Needle breaks.

Needle is bent.

 

 

 

Replace with a new needle.

28

 

 

 

 

 

Needle and looper adjustment is

Adjust the needle bar height or

55

 

incorrect.

 

 

 

 

the looper and spreader height.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Needle

and

needle

guard

Adjust correctly.

 

59

 

adjustment is incorrect.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RH-981A

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Contents RH-981A Safety Instructions SymbolsIndications Environmental requirements Sewing 3122Q Contents Changing Functions Using Names of Each Part Fly indexer -52 specificationsSpecifications SpecificationsFly indexer specifications -52 specifications Sewing shape Optional partsPD-9810, Programmer Specifications Replacement parts list for specification changesTable processing diagram InstallationInstalling the motor Installing the control box Installing the motor pulleyInstalling the machine head Lowering the machine head Raising the machine headInstalling the operation panel Installing the oil containerTightening the V-belt Connecting the valve cables Installing the spool standInstalling the hand switch Installing the air unit and the valve unitConnecting the wiring P18 Panel Connections inside the control boxConnecting the air tubes Connecting the motor cablesSecuring the cables To decrease the air pressure Installing the air tubesAdjusting the air pressure To increase the air pressureConnecting the power cord Installing the foot switch option Installing the programmer sold separatelyInstalling the indexer main unit Installing the indexer optionInstalling the upper thread presser Installing the valve unitReplacing the plate presser and presser plate Connecting the connectors Securing the air tubes and cables Installing the hand switch Filling the arm oil tank LubricationAdding oil LubricationRemoving the work clamp plates Oiling the looper, spreader and looper baseCorrect USE Data initializationChanging the lower thread and gimp trimming Threading the upper thread Installing the needleFor upper thread trimming specifications For upper and lower thread trimming specifications -01, -02Threading the lower thread 02,-52 Threading the gimpSetting the material 00, -01, -02 specificationsSpecifications Cloth setting position When set to the left setting positionHorizontal setting position Installation position Standard specificationLarge size specification Replacing the PROMs Name and function of each operation panel item OperationStarting up Parameter table Taper bar Program setting methodOperation OFF Parameter table Straight bar tacking Operation OFF Cycle program Using the program memos Program memo contentsProduction counter Automatic sewing SewingUsing the Emergency Stop switch Adjusting the thread tension Reference valuesUpper thread tension Needle and knife position Relationship between knife position and eyelet shapeExplanation of the cutting space function Switching between single-pedal and dual-pedal operation Setting the feed bracket to the front positionUsing test feed mode Using manual mode Moving the cloth feed bar -52 specifications Changing the mode during an operationCleaning Cleaning and MaintenanceChecking the air filter Draining the oilLooper height Standard AdjustmentsAdjusting the height of the spreader and looper Spreader heightAdjusting the needle and looper timing Adjusting the loop stroke Adjusting the clearance between the looper and needle Adjusting the height of the needle barAdjusting the spreader mounting positions Adjusting the needle guardAdjusting the needle racking width stitch width Adjusting the spreader timingChanging the knife cutting length Replacing the hammer Adjusting the contact between the knife and the hammer Adjusting the contact between the knife and the hammerFiling the cutting surface of the hammer Replacing the knife Adjusting the cutting pressureAdjusting the position of the work clamp plate Measuring the opening amount Adjusting the cloth opening amountAdjusting the trimming of the lower thread and gimp Adjusting the trimming of the upper threadLower thread presser -02, -52 specifications Auxiliary clamp arm -02, -52 specifications Adjusting the cloth feeding speed -52 specificationsAt the time of shipment 3110Q Using the set screw collar Adjusting the indexer hole spacing -52 specificationsAdjusting the position of limit switch R -52 specifications Adjusting the position of limit switch L -52 specificationsChanging Functions Using the Memory Switches Memory switch table Panel DIP switches Changing Functions Using the DIP SwitchesCircuit board DIP switch C Circuit board DIP switchesCircuit board DIP switch D Errors after power is turned on List of Error CodesErrors during operation Hardware errors Needle breaks TroubleshootingProblem Cause Remedy Thread breaks Skipped stitches occurThread slips out Problem Cause Remedy Upper thread is not cutCleanly Lower thread is not cut118-981

rh-918a specifications

The Brother RH-918A is a versatile and innovative machine tailored for both personal and professional use. As a robust electronic sewing machine, it combines functionality and user-friendly features that cater to a wide range of sewing enthusiasts, from beginners to advanced users.

One of the standout features of the Brother RH-918A is its extensive stitch selection. With over 100 built-in stitches, including decorative stitches, utility stitches, and heirloom stitches, users have ample options to choose from, allowing for creativity and customization in every project. The machine also incorporates an easy-to-use stitch selector dial, making it simple for sewists to navigate and find the perfect stitch for their needs.

Another key characteristic of the RH-918A is its automatic needle threader. This time-saving feature allows users to thread the needle effortlessly, reducing eye strain and frustration, especially for those who may struggle with manual threading. Additionally, the top-loading bobbin system facilitates quick bobbin changes and ensures smooth feeding, enhancing overall sewing efficiency.

The machine is equipped with a powerful motor that provides consistent and strong stitches, able to handle various fabric types, from lightweight cotton to heavier materials like denim and canvas. This capability is critical for crafting garments, home décor items, and more intricate projects.

The Brother RH-918A also boasts several convenient features to enhance the user experience. An LED light illuminates the sewing area, making it easier to work on detailed projects, particularly in low-light environments. Furthermore, the machine includes multiple presser feet, such as a zipper foot, buttonhole foot, and walking foot, to expand its functionality and accommodate different sewing techniques.

For enhanced stability, the Brother RH-918A comes with a sturdy metal frame, ensuring durability and precision. Its intuitive interface, comfortable handwheel, and adjustable stitch length and width settings add to the overall ease of use, making sewing enjoyable for everyone.

In summary, the Brother RH-918A combines a wide range of stitches, user-friendly technologies, and robust build quality, making it an excellent choice in the world of sewing machines. Whether for basic repairs or elaborate creations, this machine stands out for its performance and reliability, appealing to a diverse audience of sewing enthusiasts.
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