Brother DH4-B980 instruction manual Replacing the knife, Adjusting the cutting pressure

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9. STANDARD ADJUSTMENTS

9-12. Replacing the knife

When replacing the knife with a new one, file the surface of the cutting block until smooth and until the knife does not leave a mark on the cutting block.

Before replacing the knife, be sure to check that there is no gap between the knife (1) and the knife stopper (2).

(1)

(2)

(L 1 - L 4)

(3)

 

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1.Loosen the screw (3), and then remove the knife (1).

2.Insert the new knife (1) into the knife stopper (2), and then tighten it with the screw (3).

3.Adjusting the contact between the knife and cutting block. (Refer to the previous page.)

Note: For L1 - L4 specifications, secure the knife stopper (2) in the position closest to you (the position indicated by the dotted lines).

*When replacing the knife (1), make sure that the knife number matches the number for the eyelet shape. Replace the knife and cutting block as a set.

If knives with different numbers are used on the same cutting block, accurate cutting will not be possible, and damage to the knife may result.

9-13. Adjusting the cutting pressure

Adjust the cutting pressure to the minimum pressure that still allows the material to be cut.

*If the knife cutting length is 20 mm, sufficient cutting performance can be obtained with an air pressure of 0.2 MPa.

To adjust the cutting pressure, adjust the air pressure of the knife pressure adjustment regulator (1) which is mounted underneath the work table.

(1)

*If the cutting pressure is increased to more than is necessary, it will cause the cutting block to become worn or the knife to become damaged.

*If the material cannot be cut cleanly, do not increase the cutting pressure over the maximum limit. Check the contact between the knife and the cutting block, while referring to "9-11. Adjusting the contact between the knife and the cutting block".

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RH-9800

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Contents DH4-B980 RH-9800 Safety indications and their meanings Safety InstructionsEnvironmental requirements InstallationCleaning Maintenance and inspectionSewing Needle bar guard Contents Names of Each Part Specifications SpecificationsTable processing diagram InstallationInstalling the machine head Installing the motorInstalling the oil container Raising the machine headLowering the machine head Tightening the V-belt Installing the spool standInstalling the control box Installing the air unit and the valve assemblyConnecting the knife valve cables Connecting the ground wires and the wirings Connecting the air tubes Adjusting the air pressure Installing the air hosesTo increase the air pressure To decrease the air pressureConnecting the power cord Adding oil LubricationLubrication Filling the arm oil tank1116Q 0862Q 1117Q Initializing settings Correct USEChanging the lower thread and gimp trimming Checking the direction of machine operation Threading the upper thread Installing the needleFor upper thread trimming specifications For upper and lower thread trimming specifications -01,-02Threading the lower thread Threading the gimp Setting the materialPanel button and switch names Operation panel part namesFront panel part name Changing the mode Selecting a program numberChanging the cutting timing Setting a program Setting the buttonhole length Setting the shape of the eyeletSetting the offset Setting the tacking lengthSetting the knife position compensation Setting the cutting spaceP1. Setting X correction P2. Setting Y correctionP3. Setting θ 1 correction P4. Setting θ 2 correction OFF Using the memory switchOn Low speed List of error codes Automatic mode Using the Emergency Stop switchManual mode or in automatic mode Sewing1164Q 1165Q Tension adjustment Adjusting the thread tensionStroke adjustment Upper thread tensionNeedle and knife position Explanation of the cutting space functionRelationship between knife position and eyelet shape Knife position compensation function Resetting the production counter Using the production counterDisplaying the production counter Counting down to zero methodProgramming procedure Using a cycle programSetting the feed bracket to the front position Using feed mode Using manual mode Changing the cycle program counter Setting the number of home position cyclesReturning to the home position Draining the oil Cleaning and MaintenanceAdjusting 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 in the cutting block operation time Filing the cutting surface of the cutting block Replacing the knife Adjusting the cutting pressureMeasuring the opening amount Adjusting the cloth opening amountAdjusting the trimming of the lower thread and gimp Adjusting the trimming of the upper threadAdjusting the gimp length after trimming Sub presser Lower thread presserFront panel DIP switches Summary of DIP SwitchesCircuit board DIP switches Problem Cause Remedy Thread breaks TroubleshootingSkipped stitches occur Needle breaksCleanly ProblemRemedy Upper thread is not cut Lower thread is not cut15-1, Naeshiro-cho, Mizuho-ku, Nagoya 467-8561, Japan. Phone

DH4-B980 specifications

The Brother DH4-B980 is an innovative and advanced sewing and embroidery machine designed for both professional use and home enthusiasts. Recognized for its robust performance and user-friendly features, the DH4-B980 stands out in the market.

One of the primary features of the Brother DH4-B980 is its impressive sewing speed, allowing users to achieve up to 1,000 stitches per minute. This heightened efficiency is complemented by a range of built-in stitches, offering over 150 different stitch options, including decorative, quilting, and utility stitches. This variety equips users with the creativity to tackle a broad spectrum of sewing projects, from simple alterations to intricate embroidery designs.

The Brother DH4-B980 also features advanced embroidery capabilities. With an expansive embroidery area of 10 x 6 inches, users can work on larger designs without the need for rehooping. Additionally, the machine comes with pre-installed embroidery designs and fonts, ensuring that users have a multitude of options right at their fingertips. The user-friendly LCD touchscreen display allows for easy navigation through features, adjustments, and design selections, making the embroidery process intuitive.

In terms of technology, the Brother DH4-B980 incorporates the advanced My Custom Stitch feature, enabling users to create personalized stitch patterns. This functionality sets the machine apart, as it allows for customization to fit specific project needs or personal styles. The machine is also equipped with automatic needle threading and a quick-set drop-in bobbin, adding to overall convenience and ease of use.

Another noteworthy aspect is the built-in sewing assistant, providing tips and settings based on the selected stitch type. This feature enhances the learning curve for beginners while catering to the needs of more experienced sewists. The machine’s high-quality LED lighting illuminates the workspace, ensuring clarity and precision in sewing, particularly in low-light conditions.

Durability is achieved through quality construction and materials, ensuring that the actual performance matches user expectations even after extensive use. The Brother DH4-B980 is also designed with versatility in mind, catering to quilters, fashion designers, and hobbyists alike.

In summary, the Brother DH4-B980 combines speed, versatility, and advanced technology in a single sewing and embroidery machine. Its user-friendly features and innovative capabilities make it an excellent choice for anyone looking to elevate their sewing experience.
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