Brother 884-B01, OVERLOCK MACHINE 31

CHAPTER 6

TROUBLESHOOTING

This sewing machine is designed for trouble-free operation. However, the following chart indicates trouble which may occur if basic adjustments are not made properly.

Trouble		Cause	Remedy
1. Does not feed	Presser foot pressure too		Turn the pressure adjustment screw clockwise to
	loose		increase the presser foot pressure. (See page 7.)

2. Needles break	1.	Needles bent, or needle	Replace with new needle. (See page 11.)
2. Needles break		tip blunt	Replace with new needle. (See page 11.)
		tip blunt
	2.	Needles incorrectly	Install needles correctly. (See page 11.)
		installed	Install needles correctly. (See page 11.)
		installed
	3.	Material pulled forcibly	Do not press or pull material too hard when
	3.	Material pulled forcibly	sewing.
			sewing.

3. Threads break	1. Improper threading		Thread correctly. (See pages 13-18.)

	2.	Thread tangled	Check spool pin, thread holders, etc. and
			remove tangled thread.

	3. Thread tension too tight		Adjust the thread tension. (See pages 8-10.)

	4.	Needles incorrectly	Install needles correctly. (See page 11.)
		installed	Install needles correctly. (See page 11.)
		installed
	5.	Wrong needle used	Use correct needle
	5.	Wrong needle used	Schmetz 130/705H - suggested (See page 11.)
			Schmetz 130/705H - suggested (See page 11.)

	6. The tip of the thread		Put the tip of the thread change assembly in
		change assembly is not	Put the tip of the thread change assembly in
		change assembly is not	the eye of the upper looper. (See page 24.)
		in the eye of the upper	the eye of the upper looper. (See page 24.)
		in the eye of the upper
		looper.
4. Skipped stitches	1.	Needle bent, or needle	Replace with new needle. (See page 11.)
4. Skipped stitches		tip blunt	Replace with new needle. (See page 11.)
	2.	Needle incorrectly	Install needle correctly. (See page 11.)
		installed	Install needle correctly. (See page 11.)
		installed
	3.	Wrong needle used	Use correct needle.
	3.	Wrong needle used	Schmetz 130/705H - suggested (See page 11.)
			Schmetz 130/705H - suggested (See page 11.)

	4.	Improper threading	Thread correctly. (See pages 13-18.)

	5. Presser foot pressure too		Turn the pressure adjustment screw
	5. Presser foot pressure too		clockwise to increase the presser foot
		loose	clockwise to increase the presser foot
		loose	pressure. (See page 7.)
			pressure. (See page 7.)
	6. The tip of the thread		Put the tip of the thread change assembly in
		change assembly is not	Put the tip of the thread change assembly in
		in the eye of the upper	the eye of the upper looper. (See page 24.)
		looper.
5. Stitches are not	Thread tensions are not		Adjust the thread tension. (See pages 8-10.)
uniform	adjusted properly		Adjust the thread tension. (See pages 8-10.)
uniform	adjusted properly

	1. Thread tension too tight		Decrease thread tension when sewing
6. Fabric is puckered			lightweight or fine material.
			(See pages 8-10.)

	2.	Improper threading or	Thread correctly. (See pages 13-18.)
		thread tangled

English