Why is the lower thread not tight on my Brother BAS-300G-484/484SF Sewing Machine (0574M)?
If the lower thread is not tight on your Brother Sewing Machine (0574M), it could be because the lower thread tension is weak (increase the lower thread tension) or the upper thread tension is too strong (reduce the upper thread tension).
What causes poor seam finish on underside of material at the sewing start with my Brother BAS-300G-484/484SF?
A poor seam finish on the underside of the material at the sewing start with your Brother Sewing Machine could be due to the upper thread trailing length being too long. Adjust the sub-tension so that the upper thread trailing length after thread trimming is approximately 45 mm. You might also need to reduce the stroke of the thread take-up lever.
What causes the upper thread trailing length to be irregular on my Brother Sewing Machine?
Irregular upper thread trailing length on your Brother Sewing Machine can occur if the movable knife or fixed knife are not cutting cleanly. Replace the movable knife or sharpen/replace the fixed knife. Also, check if the sub tension or thread take-up spring tension are weak and adjust them accordingly.
What to do if my Brother BAS-300G-484/484SF work clamp pressure is not uniform?
If the work clamp pressure is not uniform at the front and back of the work clamp on your Brother Sewing Machine, adjust the tilt of the work clamp.
How do I fix my Brother Sewing Machine if the lower thread winding amount is incorrect?
If the lower thread winding amount is incorrect on your Brother Sewing Machine, adjust the position of the bobbin presser.
General| Model | BAS-300G-484/484SF |
|---|---|
| Number of Needles | 1 |
| Stitch Type | Lock Stitch |
| Type | Industrial Sewing Machine |
| Needle | DPx5 |
| Presser Foot Lift | 17 mm |
Explains the meanings of safety indications and symbols used in the manual and on the machine.
Provides essential notes on safe operation, environmental conditions, and installation guidelines.
Details safety measures for sewing, cleaning, maintenance, and outlines warning labels.
Identifies and illustrates the main components of the sewing machine.
Lists the key technical specifications, including speed, area, and power requirements.
Details the dimensions and requirements for the sewing machine table installation.
Provides steps for installing the control box and the oil pan.
Guides the installation of the machine head, hinge holders, and auxiliary plates.
Details how to tilt the machine head and install the operation panel.
Covers the installation of the pneumatic unit and speed controller adjustments.
Explains the procedures for connecting various cords and ensuring proper grounding.
Covers connecting the power cord, installing the cotton stand, and eye guard.
Covers the correct procedures for installing the needle and threading the upper thread.
Details the process of winding the lower thread and installing the bobbin case.
Explains how to adjust upper and lower thread tensions for optimal sewing.
Describes the procedure for detecting the machine's home position.
Identifies and explains the functions of each item on the basic operation panel.
Guides on loading sewing data and setting program numbers.
Explains how to set X/Y scales, sewing speed, and check the sewing pattern.
Details how to adjust the height of the intermittent presser foot.
Lists advanced functions and guides on setting memory switches.
Covers using lower thread and production counters, and setting split numbers.
Explains how to record, use, and clear user programs and cycle programs.
Provides steps for reinitializing memory data to restore normal operation.
Provides guidelines for handling CF cards and details their folder structure.
Explains the different modes for reading and writing data to/from CF cards.
Details the procedures for reading and writing sewing data to CF cards.
Covers turning on the power, selecting programs, and starting sewing.
Explains how to use the STOP switch for pausing and the thread wiper function.
Details cleaning the rotary hook and control box air inlet ports.
Covers draining the oil and performing necessary lubrication.
Covers checking the machine head switch and adjusting the arm thread guide.
Guides on adjusting thread take-up spring, needle bar height, and hook clearance.
Details adjustments for thread take-up amount and thread wiper position.
Covers replacing knives, installing feed plate, and adjusting presser foot.
Explains how to adjust the work clamp lift amount and air pressure.
Provides diagrams for processing work clamps and feed plates to match sewing patterns.
Provides solutions for common problems encountered during machine operation.
Lists error codes, their causes, and recommended remedies.
Illustrates the characters displayed on the 7-segment display.
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