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brittany89Aug 20, 2025
How to decrease lower thread tension on my Brother Sewing Machine?
- Aanthony10Aug 20, 2025
If the lower thread tension is too high on your Brother Sewing Machine, set the lower thread tension as weak as possible.
How to decrease lower thread tension on my Brother Sewing Machine?
If the lower thread tension is too high on your Brother Sewing Machine, set the lower thread tension as weak as possible.
How to decrease thread take-up spring tension on my Brother b838 Sewing Machine?
If the thread take-up spring tension is too large on your Brother Sewing Machine, set the thread take-up spring stroke as small as possible.
What to do if the bobbin races during thread cutting on my Brother Sewing Machine?
If the bobbin races during thread cutting on your Brother Sewing Machine, it might be because the bobbin is wound over 80%. To fix this, adjust the lower thread amount to 80% of the bobbin capacity.
What to do if the thread trimmer timing is improper on my Brother Sewing Machine?
To correct improper thread trimmer timing on your Brother Sewing Machine, you can try the following: * Adjust the thread trimmer timing. * If the movable knife tip is damaged or bent, replace it. * If the movable knife tip and rotary hook stop gap is too large, set the gap to 0.05-0.2 mm.
How to fix needle and rotary hook timing on Brother Sewing Machine?
If the needle and rotary hook timing is improper on your Brother Sewing Machine, adjust the needle and rotary hook point gap to 0.05 mm.
What to do if the rotary hook is damaged on my Brother Sewing Machine?
If you have a damaged rotary hook on your Brother Sewing Machine, here are some possible solutions: * Polish the rotating hook holding slot in the needle holding slot. * Set the rotary hook and bobbin case opener gap to 0.2 mm. * Set the needle and rotary hook point gap to 0.5 mm. * Check that the needle plate gap is approximately 1.3 mm. * Adjust the needle bar lift stroke and height. * For insufficient lubrication, refer to p. 7 of the supplementary instruction manual.
How to adjust needle plate and rotary hook gap on Brother b838 Sewing Machine?
If the needle plate and rotary hook gap is incorrect on your Brother Sewing Machine, adjust the rotary hook and needle plate gap to approximately 1.3 mm.
How to decrease sewing speed on my Brother Sewing Machine?
If the sewing speed is too fast on your Brother Sewing Machine (motor rotation is too fast), decrease the sewing speed by replacing the motor pulley with a smaller one.
What to do if lower thread not running in normal direction on Brother b838?
If the lower thread is not running in the normal direction on your Brother Sewing Machine, adjust it so the lower thread winds in the same direction the rotary hook rotates.
What to do if the movable knife stroke is small on my Brother b838 Sewing Machine?
If the movable knife stroke is small (insufficient movable knife extension) on your Brother Sewing Machine, install the slider assembly so it extends out to the needle side.
Adjusting needle and feed timing for models.
Adjusting thread cutter timing for specific models.
Adjusting timing for upper and lower shafts.
Adjusting the position of the lower belt wheel.
Adjusting the gap between the needle bar and presser bar.
Adjusting needle and rotary hook timing.
Setting the gap between the rotary hook and needle plate.
Guide to identify and resolve common sewing machine problems.
General| Brand | Brother |
|---|---|
| Model | b838 |
| Category | Sewing Machine |
| Language | English |
