Brother DH4-B980 instruction manual Adjusting the trimming of the upper thread

Page 59

9. STANDARD ADJUSTMENTS

9-15. Adjusting the trimming of the upper thread

The upper thread should be trimmed at the correct time after sewing is completed.

(1)

(2)

<-00, -01>

1.Adjust so that the upper thread trimmer knife (1) cuts

only one of the threads in front of the right looper (2). Note: If both strands of the thread loop are cut, the

thread remaining in the needle may become too short and skipped stitches may result.

0980Q

(3)

(4)

0981Q

<-02>

1.Adjust so that the upper thread trimmer knife (3) cut

only one of the threads in front of the right looper (4). Note: If both strands of the thread loop (forward and

back) are cut, the thread remaining in the needle may become too short and skipped stitches may result.

9-16. Adjusting the trimming of the lower thread and gimp

<-00, -01>

The lower thread and gimp should be trimmed at the correct time after the feed bracket has returned to the home position. Thread trimming operation can be checked in steps while manual mode is active. (Refer to “Using manual mode” on page 39.)

 

(6)

 

(6)

 

 

(7)

 

(1)

 

(4)

(4)

(8)

 

(2)

 

(2)

 

 

 

 

(3)

(3)

(5)

(7)

0982Q

0983Q

 

1.The mechanism is adjusted so that the lower thread and gimp are separated from each other and spread by the loop spreader (1).

2.The lower thread is held between thread nipper M (2) and thread nipper D (3) on the plate spring. The gimp is held between thread nipper M (2) and thread nipper U (4) on the plate spring.

3.Adjust so that the edge of the fixed knife (6) and the index mark (8) on the movable knife (7) are aligned when the thread trimmer knife arm (5) is at the maximum stroke.

RH-9800

53

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Page 58 Page 60
Contents DH4-B980 RH-9800 Safety indications and their meanings Safety InstructionsEnvironmental requirements InstallationSewing CleaningMaintenance and inspection Needle bar guard Contents Names of Each Part Specifications SpecificationsTable processing diagram InstallationInstalling the machine head Installing the motorLowering the machine head Installing the oil containerRaising the machine head Tightening the V-belt Installing the spool standConnecting the knife valve cables Installing the control boxInstalling the air unit and the valve assembly Connecting the ground wires and the wirings Connecting the air tubes To decrease the air pressure Installing the air hosesAdjusting the air pressure To increase the air pressureConnecting the power cord Filling the arm oil tank LubricationAdding oil Lubrication1116Q 0862Q 1117Q Changing the lower thread and gimp trimming Initializing settingsCorrect USE Checking the direction of machine operation Threading the upper thread Installing the needleThreading the lower thread For upper thread trimming specificationsFor upper and lower thread trimming specifications -01,-02 Threading the gimp Setting the materialFront panel part name Panel button and switch namesOperation panel part names Changing the cutting timing Changing the modeSelecting a program number 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 spaceP3. Setting θ 1 correction P1. Setting X correctionP2. Setting Y correction P4. Setting θ 2 correction OFF Using the memory switchOn Low speed List of error codes Sewing Using the Emergency Stop switchAutomatic mode Manual mode or in automatic mode1164Q 1165Q Upper thread tension Adjusting the thread tensionTension adjustment Stroke adjustmentRelationship between knife position and eyelet shape Needle and knife positionExplanation of the cutting space function Knife position compensation function Counting down to zero method Using the production counterResetting the production counter Displaying the production counterProgramming 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 MaintenanceLooper 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 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 Needle breaks TroubleshootingProblem Cause Remedy Thread breaks Skipped stitches occurLower thread is not cut ProblemCleanly Remedy Upper 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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