Brother rh-918a manual Replacing the PROMs

Page 41

5. CORRECT USE

5-9. Replacing the PROMs

Refer to the following when replacing the PROMs (for example, when upgrading the version number). At this time, be particularly careful not to make a mistake with the direction of the PROM.

<Control circuit board>

 

 

 

 

 

 

The PROM which is marked “MN” is the main PROM.

 

 

 

 

 

 

 

 

 

 

 

 

This PROM is mounted in position (1).

 

 

 

 

 

 

The PROM which is marked “MT” is the machine

 

 

 

 

 

 

motor PROM.

3047Q

 

 

 

 

 

This PROM is mounted in position (2).

 

 

 

 

 

 

 

 

 

<Panel circuit board>

 

The PROM which is marked “PL” is the panel PROM.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This PROM is mounted in position (3).

 

 

 

 

 

* The figure inside the box indicates

 

 

 

 

 

the version number.

 

 

 

 

 

 

2430Q

3048Q

 

RH-981A

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Contents RH-981A Indications Safety InstructionsSymbols Environmental requirements Sewing 3122Q Contents Changing Functions Using Names of Each Part Fly indexer -52 specificationsFly indexer specifications -52 specifications SpecificationsSpecifications PD-9810, Programmer Sewing shapeOptional parts 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 Installing the hand switch Installing the spool standInstalling the air unit and the valve unit Connecting the valve cablesConnecting the wiring P18 Panel Connections inside the control boxConnecting the air tubes Connecting the motor cablesSecuring the cables Adjusting the air pressure Installing the air tubesTo increase the air pressure To decrease the air pressureConnecting the power cord Installing the foot switch option Installing the programmer sold separatelyInstalling the indexer main unit Installing the indexer optionReplacing 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 Adding oil LubricationLubrication Filling the arm oil tankRemoving the work clamp plates Oiling the looper, spreader and looper baseChanging the lower thread and gimp trimming Correct USEData initialization Threading the upper thread Installing the needleThreading the lower thread For upper thread trimming specificationsFor upper and lower thread trimming specifications -01, -02 02,-52 Threading the gimpSpecifications 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 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 Production counter Using the program memosProgram memo contents Automatic sewing 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 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 oilAdjusting the height of the spreader and looper Standard AdjustmentsSpreader height Looper 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 Filing the cutting surface of the hammer Adjusting the contact between the knife and the hammerAdjusting the contact between the knife and 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 At the time of shipment Auxiliary clamp arm -02, -52 specificationsAdjusting the cloth feeding speed -52 specifications 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 Problem Cause Remedy Thread breaks TroubleshootingSkipped stitches occur Needle breaksCleanly Problem Cause Remedy Upper thread is not cutLower thread is not cut 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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