Brother Needle Bar Height Adjustment: A Guide to Optimize Your Sewing Machine Performance
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9. STANDARD ADJUSTMENTS

9-4. Adjusting the height of the needle bar

The standard height for the needle bar is 2.5 mm. (The needle bar height may need changing depending on the material and thread being used.)

(2)

(4)

 

 

 

 

(5)

 

(1)

(3)

2.5 mm

2.5 mm

 

 

 

 

(6)

 

0959Q

0960Q

0961Q

1.Align the tip of the left looper (1) with the center of the needle (2) when the needle (2) is at the inside sewing position.

2.Remove the face plate.

3.Loosen the screw (3) of the needle bar clamp (5) and adjust the height of the needle bar (4).

*After aligning the tip of the left looper (1) with the top edge of the needle hole, lower the needle bar (4) 2.5 mm.

4.Adjust so that there is as little play as possible, and so that the needle bar clamp (5) and the needle bar horizontal link

(6) can maintain their oil films. This will help to ensure that the needle bar turns smoothly.

9-5. Adjusting the clearance between the looper and needle

Be sure to carry out this adjustment after changing the size of the needle.

The clearance between the tip of the looper and the needle should be 0.05 - 0.2 mm.

0.05 - 0.2 mm

(1)

0962Q

0963Q

1.Loosen the looper screw (1) and then adjust the clearance.

*This clearance must be uniform while the race stand is rotating (through 360o ).

If the clearance is not uniform, adjust the turning center for the needle bar. (This adjustment is made at the time of shipment from the factory.)

*After making the adjustment in step 1. above, carry out the adjustment procedure given in "9-7. Adjusting the spreader mounting positions".

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RH-9800

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Contents DH4-B980 RH-9800 Safety Instructions Safety indications and their meaningsInstallation Environmental requirementsMaintenance and inspection CleaningSewing Needle bar guard Contents Names of Each Part Specifications SpecificationsInstallation Table processing diagramInstalling the motor Installing the machine headRaising the machine head Installing the oil containerLowering the machine head Installing the spool stand Tightening the V-beltInstalling the air unit and the valve assembly Installing the control boxConnecting the knife valve cables Connecting the ground wires and the wirings Connecting the air tubes Installing the air hoses Adjusting the air pressureTo increase the air pressure To decrease the air pressureConnecting the power cord Lubrication Adding oilLubrication Filling the arm oil tank1116Q 0862Q 1117Q Correct USE Initializing settingsChanging the lower thread and gimp trimming Checking the direction of machine operation Installing the needle Threading the upper threadFor upper and lower thread trimming specifications -01,-02 For upper thread trimming specificationsThreading the lower thread Setting the material Threading the gimpOperation panel part names Panel button and switch namesFront panel part name Selecting a program number Changing the modeChanging the cutting timing Setting a program Setting the shape of the eyelet Setting the buttonhole lengthSetting the tacking length Setting the offsetSetting the cutting space Setting the knife position compensationP2. Setting Y correction P1. Setting X correctionP3. Setting θ 1 correction P4. Setting θ 2 correction Using the memory switch OFFOn Low speed List of error codes Using the Emergency Stop switch Automatic modeManual mode or in automatic mode Sewing1164Q 1165Q Adjusting the thread tension Tension adjustmentStroke adjustment Upper thread tensionExplanation of the cutting space function Needle and knife positionRelationship between knife position and eyelet shape Knife position compensation function Using the production counter Resetting the production counterDisplaying the production counter Counting down to zero methodUsing a cycle program Programming procedureSetting the feed bracket to the front position Using feed mode Using manual mode Setting the number of home position cycles Changing the cycle program counterReturning to the home position Cleaning and Maintenance Draining the oilStandard Adjustments Adjusting the height of the spreader and looperSpreader height 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 in the cutting block operation time Filing the cutting surface of the cutting block Adjusting the cutting pressure Replacing the knifeAdjusting the cloth opening amount Measuring the opening amountAdjusting the trimming of the upper thread Adjusting the trimming of the lower thread and gimpAdjusting the gimp length after trimming Lower thread presser Sub presserSummary of DIP Switches Front panel DIP switchesCircuit board DIP switches Troubleshooting Problem Cause Remedy Thread breaksSkipped stitches occur Needle breaksProblem CleanlyRemedy 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.

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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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