How to adjust incorrect thread tightness on Brother BE-438C?
Incorrect thread tightness can be due to: * Upper thread tension being too weak; adjust the upper thread tension. * Lower thread tension being too weak; adjust the lower thread tension. * Thread take-up spring tension and height being incorrect; adjust the tension and height of the thread take-up spring.
What to do if Brother BE-438C thread is jamming?
Thread jamming can occur if: * The thread take-up spring tension and height are incorrect; adjust them. * The needle and rotary hook timing are incorrect; adjust the needle bar lift amount. * The shuttle race thread guide is not separating the threads; adjust its position.
Why is my Brother BE-438C Sewing Machine lower thread breaking?
The lower thread may break because: * The lower thread tension is too strong, so adjust the lower thread tension. * The corners of the needle hole plate or bobbin case are damaged; file smooth or replace the affected part.
Why does the upper thread keep breaking on my Brother Sewing Machine?
If the upper thread of your Brother Sewing Machine breaks, it could be due to several reasons. The upper thread tension might be too strong, so try adjusting it. Ensure the needle is installed correctly. The thread might be too thick for the needle; use the correct thread. Check the thread take-up spring tension and height, adjusting if necessary. Inspect for damage on the rotary hook, needle hole plate, or needle, and file smooth or replace if needed. If using synthetic thread, consider a thread cooling device to prevent melting.
Why does the lower thread wind to one side on my Brother Sewing Machine?
If the lower thread winds to one side on your Brother Sewing Machine, the bobbin winder thread tension stud height may be incorrect. Adjust the height of the thread tension stud to correct this.
What to do if the thread tightness is incorrect on my Brother Sewing Machine?
Incorrect thread tightness on your Brother Sewing Machine can occur if the upper thread tension is too weak, so adjust it. The lower thread tension might also be too weak; adjust that as well. Additionally, the thread take-up spring tension and height could be incorrect, requiring adjustment.
What causes the lower thread to break on my Brother BE-438C Sewing Machine?
If the lower thread breaks on your Brother Sewing Machine, it may be because the lower thread tension is too strong, so adjust it. Also, check the needle hole plate or bobbin case for damaged corners and file smooth or replace the affected part.
Why is the thread jamming in my Brother Sewing Machine?
Thread jamming in your Brother Sewing Machine could be caused by incorrect thread take-up spring tension and height; adjust accordingly. It may also be due to incorrect needle and rotary hook timing, so adjust the needle bar lift amount. Another cause may be that the shuttle race thread guide is not separating the threads properly; in this case, adjust its position.
Why is the thread coming unthreaded on my Brother BE-438C?
The thread may come unthreaded due to: * Stitches being skipped at the sewing start; refer to “Skipped stitches occur”. * Uneven needle thread; adjust the sub-tension. * The needle thread being too short; adjust the thread take-up lever stroke.
How to fix Brother BE-438C when needle breaks?
A needle can break for the following reasons: * The needle is touching the rotary hook; adjust the needle clearance. * The needle is bent; replace the needle. * The needle is too thin; use the correct needle for the material. * The needle is striking the button; refer to “6. CHECKING THE SEWING PATTERN” in the Instruction Manual.
General| Brand | Brother |
|---|---|
| Model | BE-438C |
| Category | Sewing Machine |
| Language | English |
Explains safety indications and symbols used in the manual and on the machine.
Specifies environmental conditions for machine operation.
General guidance for installing the sewing machine and its components.
Step-by-step instructions for cleaning sewing machine parts.
Procedures for carrying out regular maintenance and inspections.
Explains the high temperature warning symbol on the machine.
Illustrates the direction of operation and identifies key machine parts.
Lists and labels the safety devices attached to the machine.
Detailed technical specifications of the BE-438C sewing machine.
List of pre-set sewing programs with parameters like stitches and dimensions.
Instructions for setting up the power table, including dimensions and requirements.
Step-by-step guide to mounting the control box onto the machine.
Procedures for installing rubber cushions and the oil pan.
Steps for mounting the switching plate and machine head.
Instructions for installing the head rest and optional cooling tank.
How to install the operation panel and connect the ground wire.
Detailed instructions for connecting various machine cords to the control box.
Steps for installing the belt cover and the foot switch.
Procedures for installing the spool stand and button tray.
How to attach the eye guard assembly to the face plate.
Identifies key points requiring lubrication on the sewing machine.
Explains the purpose of each button and indicator on the operation panel.
Step-by-step guide to operating the sewing machine.
How to select and set a specific sewing program number.
Adjusting the X and Y scale settings for pattern dimensions.
How to adjust and set the sewing speed in RPM.
Safety precautions to prevent accidental changes during pattern checking.
Guidelines for selecting appropriate needles and threads based on material.
Procedures for correctly installing the needle and threading the upper thread.
Detailed steps for winding the bobbin thread onto the bobbin.
How to replace the bobbin case and thread it correctly.
Reference guide for setting and adjusting thread tension.
Detailed instructions for adjusting lower, upper, and take-up spring tensions.
How to adjust thread take-up amount and guide R.
Procedures for inserting buttons and adjusting the button holder.
Steps for replacing the Programmable Read-Only Memory (PROM).
Steps to take before starting the sewing process, including checks.
How to check the needle and clean the rotary hook.
Detailed instructions for lubricating various parts of the machine.
Procedures for draining oil and cleaning air inlets/holes.
How to adjust the needle bar height and lift amount.
Adjusting the driver needle guard and needle-to-hook clearance.
How to adjust the shuttle race thread guide position.
How to adjust the amount of thread taken up by the lever.
Steps for adjusting the movable knife for thread trimming.
How to replace the movable and fixed knives.
Adjusting knife engagement and button clamp lift.
Adjusting holding pressure and button holder position.
Adjusting needle stop position and thread wiper.
How to check input sensors and DIP switch configurations.
Checking input voltage and clearing memory settings.
How to move recorded stitch patterns to different positions.
How to set and use the bobbin thread counter.
How to display and use the production counter.
Explains the functions of DIP switches on the operation panel.
How to set the presser mode using DIP switch combinations.
Explains the functions of DIP switches located inside the control box.
How to record, use, and clear user programs.
Describes functions controlled by memory switches 00 through 0F.
Describes functions controlled by memory switches 10 through 1F.
Describes functions controlled by memory switches 30 through 4F.
How to record and use the cycle sewing function for patterns.
Explains common error codes related to machine setup and operation.
Explains specific error codes for circuit and data issues.
Lists error codes related to optional equipment malfunctions.
Lists and illustrates various feed plates for different sewing needs.
Lists different button clamp spacers.
Lists and illustrates various needle hole plates.
Troubleshooting steps for button clamp and thread wiper malfunctions.
Solutions for thread breakage and skipped stitches.
Troubleshooting for needle breakage and trimming problems.
Solutions for poor seam finish and threading issues.
Troubleshooting for machine operation and stitch tightness problems.
Describes the two-pedal and two-step foot switches.
Describes the liquid cooling tank and solenoid thread wiper.
Describes the function of the emergency stop switch.
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