Brother rh-918a manual Standard Adjustments, Adjusting the height of the spreader and looper

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9. STANDARD ADJUSTMENTS

9. STANDARD ADJUSTMENTS

CAUTION

Maintenance and inspection of the sewing

Disconnect the air hoses from the air supply and

machine should only be carried out by a

wait for the needle on the pressure gauge to

qualified technician.

drop to "0" before carrying out inspection,

Ask your Brother dealer or a qualified electrician

adjustment and repair of any parts which use

the pneumatic equipment.

to carry out any maintenance and inspection of

 

 

the electrical system.

If the power switch and air need to be left on

Turn off the power switch and disconnect the

when carrying out

some adjustment, be

extremely careful

to observe all safety

power cord from the wall outlet at the following

precautions.

 

times, otherwise the machine may operate if the

 

 

 

start switch is pressed by mistake, which could

If any safety devices have been removed, be

result in injury.

absolutely sure to re-install them to their original

When carrying out inspection, adjustment

positions and check that they operate correctly

and maintenance.

before using the machine.

When replacing consumable parts such as

 

 

the loopers and knife.

 

 

9-1. Adjusting the height of the spreader and looper

Spreader height

The clearance between the left spreader (forked spreader) and the eye looper must be set to match the thickness of the lower thread. The clearance between the right spreader and the right looper should be as small as possible while still letting the parts slide.

 

 

 

 

3072Q

 

 

 

 

3071Q

 

 

 

 

 

 

1.The right spreader (1) and left spreader (2) move by means of springs (3). Adjust so that the spreaders move smoothly between the right spreader stopper (4), the left spreader stopper (5) and the LS-holder bracket (6), with no looseness.

2.If adjustment is necessary, loosen the screw (7) and then move the right spreader stopper (4) or left spreader stopper (5) up or down.

Looper height

3073Q

3074Q

1.Set the clearance between the eye looper (8) and the left spreader (2) to the same distance as the thickness of the lower (looper) thread.

2.The clearance between the right looper (9) and the right spreader (1) should be as small as possible.

3.If adjustment is necessary, loosen the screw (10) and then move the eye looper (8) and right looper (9) up or down.

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RH-981A

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Contents RH-981A Indications Safety InstructionsSymbols Environmental requirements Sewing 3122Q Contents Changing Functions Using Fly indexer -52 specifications Names of Each PartFly indexer specifications -52 specifications SpecificationsSpecifications PD-9810, Programmer Sewing shapeOptional parts Replacement parts list for specification changes SpecificationsInstallation Table processing diagramInstalling the motor Installing the motor pulley Installing the control boxInstalling the machine head Raising the machine head Lowering the machine headInstalling the oil container Installing the operation panelTightening the V-belt Installing the air unit and the valve unit Installing the spool standInstalling the hand switch Connecting the valve cablesConnecting the wiring Connections inside the control box P18 PanelConnecting the motor cables Connecting the air tubesSecuring the cables To increase the air pressure Installing the air tubesAdjusting the air pressure To decrease the air pressureConnecting the power cord Installing the programmer sold separately Installing the foot switch optionInstalling the indexer option Installing the indexer main unitReplacing the plate presser and presser plate Installing the upper thread presserInstalling the valve unit Connecting the connectors Securing the air tubes and cables Installing the hand switch Lubrication LubricationAdding oil Filling the arm oil tankOiling the looper, spreader and looper base Removing the work clamp platesChanging the lower thread and gimp trimming Correct USEData initialization Installing the needle Threading the upper threadThreading the lower thread For upper thread trimming specificationsFor upper and lower thread trimming specifications -01, -02 Threading the gimp 02,-52Specifications Setting the material00, -01, -02 specifications Horizontal setting position Cloth setting positionWhen set to the left setting position Large size specification Installation positionStandard specification Replacing the PROMs Operation Name and function of each operation panel itemStarting up Program setting method Parameter table Taper barOperation OFF Parameter table Straight bar tacking Operation OFF Cycle program Production counter Using the program memosProgram memo contents Sewing Automatic sewingUsing the Emergency Stop switch Upper thread tension Adjusting the thread tensionReference values Explanation of the cutting space function Needle and knife positionRelationship between knife position and eyelet shape Setting the feed bracket to the front position Switching between single-pedal and dual-pedal operationUsing test feed mode Using manual mode Changing the mode during an operation Moving the cloth feed bar -52 specificationsCleaning and Maintenance CleaningDraining the oil Checking the air filterSpreader height Standard AdjustmentsAdjusting the height of the spreader and looper Looper heightAdjusting the needle and looper timing Adjusting the loop stroke Adjusting the height of the needle bar Adjusting the clearance between the looper and needleAdjusting the needle guard Adjusting the spreader mounting positionsAdjusting the spreader timing Adjusting the needle racking width stitch widthChanging the knife cutting length Replacing the hammer Filing the cutting surface of the hammer Adjusting the contact between the knife and the hammerAdjusting the contact between the knife and the hammer Adjusting the cutting pressure Replacing the knifeAdjusting the position of the work clamp plate Adjusting the cloth opening amount Measuring the opening amountAdjusting the trimming of the upper thread Adjusting the trimming of the lower thread and gimpLower thread presser -02, -52 specifications At the time of shipment Auxiliary clamp arm -02, -52 specificationsAdjusting the cloth feeding speed -52 specifications 3110Q Adjusting the indexer hole spacing -52 specifications Using the set screw collarAdjusting the position of limit switch L -52 specifications Adjusting the position of limit switch R -52 specificationsChanging Functions Using the Memory Switches Memory switch table Changing Functions Using the DIP Switches Panel DIP switchesCircuit board DIP switches Circuit board DIP switch CCircuit board DIP switch D List of Error Codes Errors after power is turned onErrors during operation Hardware errors Skipped stitches occur TroubleshootingProblem Cause Remedy Thread breaks Needle breaksLower thread is not cut Problem Cause Remedy Upper thread is not cutCleanly Thread slips out118-981

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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