What to do if the upper thread is not cut on my Brother BAS-341H Sewing Machine?
If the upper thread is not being cut, the movable knife may be blunt and needs replacement, or the fixed knife may be blunt and needs sharpening or replacement. The movable knife might not be picking up the upper thread, requiring a timing adjustment. You might need to adjust the standby position of the movable knife. Refer to 'Skipped stitches occur'.
Why is the pattern distorted on my Brother BAS-341H Sewing Machine?
If the pattern is distorted, it may be because the work clamp and feed plate are too heavy. If you are using heavy work clamp and feed plate, change the operation settings to the settings for heavy-weight materials.
Why is the work clamp pressure not uniform on my Brother BAS-341H?
If the work clamp pressure isn't uniform at the front and back, the work clamp may be tilted. Adjust the tilt of the work clamp.
Why doesn't the work clamp rise to the maximum height on my Brother Sewing Machine?
If the work clamp doesn't rise to its maximum height, the work clamp lifter lever position may be incorrect. Adjust the position of the work clamp lifter lever.
What to do if the lower thread is not cut on my Brother BAS-341H Sewing Machine?
If the lower thread is not being cut, it may be because the lower thread tension is too weak. Increase the lower thread tension.
Why is the work clamp pressure too weak on my Brother Sewing Machine?
If the work clamp pressure is too weak, the air pressure may be too weak. Adjust the regulator so that the air pressure is about 0.5 MPa.
Why is there a poor seam finish on the underside of the material at the sewing start with my Brother BAS-341H?
A poor seam finish on the underside of the material at the sewing start can occur if the upper thread trailing length is too long. Adjust the sub-tension so that the upper thread trailing length after thread trimming is approximately 42 mm.
What to do if the work clamp does not work on my Brother BAS-341H?
The work clamp may not function if the air cock is closed; open it. If the air pressure is too weak, adjust the regulator to approximately 0.5 MPa. If the speed controller has been tightened too far, loosen it 4 turns from the fully-tightened position.
What to do if thread wiper does not operate correctly on Brother BAS-341H?
If the thread wiper isn't working correctly, it could be obstructing the needle, in which case you should adjust its height. Adjust the operating stroke of the thread wiper. The thread wiper position might be incorrect, so adjust the operating stroke of the thread wiper.
Why is the upper thread breaking on my Brother BAS-341H?
If the upper thread is breaking, it could be due to several factors. Make sure the thread isn't too thick for the needle; if it is, select a suitable thread. Ensure the needle is installed correctly and the thread is threaded correctly. Damage or burring in parts like the rotary hook, needle hole plate, needle, or thread path can cause breakage; repair these parts by buffing. Incorrect needle and rotary hook timing requires timing adjustment. If the upper thread tension or thread take-up spring tension is too strong, reduce it. If the thread breaks due to heat, consider using a needle cooler unit or reducing the sewing speed.
General| Brand | Brother |
|---|---|
| Model | BAS-341H |
| Category | Sewing Machine |
| Language | English |
Explains safety indications and symbols used in the manual and on the machine.
Provides crucial safety notes regarding electrical hazards, environmental conditions, and proper usage.
Details environmental conditions like temperature, humidity, and electrical noise for optimal operation.
Advises on safe installation procedures, weight handling, and electrical grounding.
Safety precautions to take during sewing operations, including protective gear and avoiding moving parts.
Safety measures for cleaning the machine, handling oils, and using protective gear.
Outlines safety precautions for maintenance and inspection, including electrical safety and part handling.
Identifies and labels the key components of the sewing machine.
Lists technical specifications for the BAS-341H and BAS-342H sewing machines.
Illustrates the required dimensions and processing steps for the sewing machine table.
Step-by-step instructions for securely mounting the control box to the sewing machine table.
Details the process of attaching the oil pan and support lever base to the machine.
Instructions for safely placing and securing the machine head onto the table.
Explains the safe procedure for tilting and returning the machine head for access or adjustment.
Step-by-step guide for installing the gas spring to support the machine head.
Instructions for mounting and connecting the LCD control panel to the machine.
Details on how to install the solenoid valve assembly underneath the work table.
Guidance on connecting the various air tubes to the system.
Instructions for connecting and setting up the air hose for pneumatic functions.
Explains the connection and operation of the two-pedal foot switch.
Instructions for routing and connecting various electrical cords within the control box.
Emphasizes the importance of secure ground connections for electrical safety.
Guides on how to properly secure all cords and air tubes under the table and in the control box.
Instructions for connecting the power cord, including ground wire connection and voltage specifications.
Steps for securely attaching the eye guard for operator safety.
Instructions for mounting the cotton stand for thread spool placement.
Detailed instructions on lubricating the machine before first use and for maintenance.
Procedure to check the machine head switch and adjust its position if errors occur.
Step-by-step guide for correctly inserting the needle into the machine.
Explains how to operate the work clamp and start sewing using the two-pedal foot switch.
Detailed instructions for threading the upper thread through the machine.
Describes how to use the threading mode for easier thread insertion.
Instructions for winding thread onto the bobbin using the machine's winder.
Step-by-step guide for properly inserting the bobbin case into the rotary hook.
Provides reference values and guidelines for setting upper and lower thread tension.
Explains how to adjust the lower thread tension for optimal sewing.
Details on adjusting the upper thread tension using digital controls and manual nut.
Steps to follow before turning on the power and starting the machine.
Instructions on configuring the work clamp for two-step lowering operation.
Step-by-step guide for performing the actual sewing operation on the machine.
Explains how to use the emergency stop switch and continue sewing after a stop.
Detailed steps for cleaning the rotary hook assembly and removing lint.
Instructions for draining and managing the lubricating oil from the machine.
Procedure for checking the regulator for water and draining it.
How to clean the air inlet ports on the control box using a vacuum cleaner.
Instructions for cleaning the eye guard with a soft cloth.
Guidance on checking the needle for damage or bending before sewing.
Refers to section 3-18 for lubrication instructions.
How to adjust the thread breakage sensor sensitivity for reliable detection.
Adjusting the height and tension of the thread take-up spring for even thread length.
How to adjust the arm thread guide for different material weights to control thread take-up.
Procedure for adjusting the needle bar height relative to the needle bar bush.
Steps to align the needle with the rotary hook for correct stitch formation.
How to adjust the driver position to prevent needle contact and skipped stitches.
Setting the precise gap between the needle and the rotary hook tip.
Instructions for positioning the shuttle race thread guide correctly.
Methods to adjust the amount of oil supplied to the rotary hook for proper lubrication.
Steps to adjust the position of the movable knife for accurate thread trimming.
Detailed procedure for replacing the movable and fixed knives for thread trimming.
Instructions for correctly installing the feed plate onto the machine.
How to adjust the position and stroke of the thread wiper for effective operation.
Guides on setting the correct installation position for the intermittent presser foot.
How to adjust the stroke of the intermittent presser foot by changing link positions.
Procedure to set the maximum lift amount for the work clamp.
How to adjust the air pressure using the regulator to the specified 0.5 MPa.
Adjusting lifting and lowering speeds of the work clamp using valve knobs.
Diagrams for processing work clamps and feed plates to match specific sewing patterns.
Provides a comprehensive list of error codes, their causes, and remedies for troubleshooting.
Troubleshooting steps for when the machine fails to start.
Diagnosing and fixing issues related to the work clamp not functioning correctly.
Addresses issues with the lower thread winding unevenly or incorrectly on the bobbin.
Troubleshooting common issues causing thread to unravel at the beginning of sewing.
Common causes and remedies for skipped stitches during sewing.
Troubleshooting guide for frequent upper thread breakage issues.
Reasons and solutions for the lower thread breaking during operation.
Common causes and remedies for needle breakage during sewing.
Troubleshooting steps when the upper thread is not being trimmed properly.
Solutions for issues where the lower thread is not cut correctly.
Addresses problems with the upper thread not being sufficiently taut.
Troubleshooting steps for when the lower thread is not tight enough.
Solutions for poor seam quality at the beginning of the sewing process.
How to fix irregular upper thread trailing length for consistent stitching.
To Next Page
