What to do if Brother Sewing Machine does not start after emergency stop?
If your Brother Sewing Machine does not start after an emergency stop, it may be because the emergency stop switch has not been released. To resolve this, turn the emergency stop switch knob to release it.
What to do if my Brother LH4-B800E is skipping stitches?
If your Brother Sewing Machine is skipping stitches, it might be due to using a thin needle (use a needle with a count that matches the thread and material). Another cause could be upper clamping foot pressure (increase it). Also, check for a blunt rotary hook point (polish with buff or replace the rotary hook), strength of sub thread tension (zigzag portion) (adjust the upper thread tension to the appropriate tension), or excessive needle bar play (reduce the needle bar play, or replace the parts).
Why does the lower thread break on my Brother Sewing Machine?
If the lower thread breaks in your Brother Sewing Machine, try the following: * Thread the bobbin correctly to match the sewing. * Install the needle correctly. * Thread the upper thread correctly. * Adjust the timing of the needle and rotary hook. * Adjust the clearance between the needle and rotary hook. * Adjust the height of the needle bar. * Adjust to an appropriate tension.
What to do if cutter position is incorrect in Brother LH4-B800E?
If the cutter position is incorrect on your Brother Sewing Machine, adjust the cutter to the center of the needle plate cutter groove.
How to fix poor thread tightening on Brother Sewing Machine?
To resolve poor thread tightening on your Brother Sewing Machine, adjust the tack tension and adjust the zigzag tension.
Why is the needle thread breaking on my Brother Sewing Machine?
If the needle thread of your Brother Sewing Machine is breaking, make sure to reattach the needle properly. Other potential causes include incorrect needle installation height (the end of the needle shank should touch the top edge of the needle hole of the needle bar), a bent, blunt, or burred needle (replace the needle), using the wrong needle for the thread (replace with a suitable needle), improper threading (rethread the machine), issues with the thread path (polish with buff), or incorrect thread tension (adjust the needle thread tension). Also, adjust the needle thread tension if you have problems with sub thread tension (Zigzag chain stitch) or main thread tension.
Why does my Brother LH4-B800E stop while sewing?
If your Brother Sewing Machine stops during sewing, it could be due to the thread breakage detector (adjust it). Another reason might be an emergency stop triggered if the treadle is pressed firmly and then released, as the machine may interpret this as a backward depression of the treadle.
What to do if upper shaft cannot be turned manually in Brother LH4-B800E?
If the upper shaft of your Brother Sewing Machine cannot be turned manually, turn the machine pulley backward to set the needle bar to the needle up position and then return to the home position.
What to do if clearance between upper thread scissors and work clamp is incorrect on Brother LH4-B800E Sewing Machine?
If the clearance between the upper thread scissors and work clamp is incorrect on your Brother Sewing Machine, install the upper thread scissors correctly.
How to fix uneven seams at the beginning of sewing with my Brother LH4-B800E Sewing Machine?
If the seams on your Brother Sewing Machine are uneven at the beginning of sewing, increase the bobbin thread tension. You should also adjust the lower thread retainer position.
General| Brand | Brother |
|---|---|
| Model | LH4-B800E |
| Category | Sewing Machine |
| Language | English |
Explains the meaning of danger, caution, and warning symbols used in the manual.
Details safe practices for machine installation, including handling weight and securing cords.
Instructions for installing the power table and related components.
Steps for installing the sewing machine motor.
How to mount the sewing machine head onto the bed base.
Detailed instructions for connecting electrical harnesses, ground wire, and power cord.
Procedures for installing and adjusting the treadle mechanism.
How to operate the machine using the treadle for different functions.
Guide to setting and customizing sewing programs and parameters.
How to check sewing patterns without manually turning the machine pulley.
Proper procedures for installing the sewing machine needle.
Step-by-step guide for threading the upper thread correctly.
Instructions for winding the lower thread onto the bobbin.
Guide on how to correctly thread the bobbin case.
Details on adjusting upper and lower thread tensions for optimal stitch quality.
Step-by-step guide to start and complete a sewing operation.
Procedures for responding to emergency stops during sewing.
Procedures for responding to thread breakage during sewing.
How to handle thread breakage that occurs just before sewing finishes.
Instructions for cleaning thread passages, work clamp, and shuttle areas.
Steps to adjust the needle bar to its correct height.
How to adjust the timing between the needle and the rotary hook.
A table listing error codes, their causes, and recommended remedies for malfunctions.
Provides solutions for issues like thread breaks, skipped stitches, and poor tension.
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