10. TROUBLESHOOTING

 

Problem

 

 

Cause

 

 

Remedy

Reference

 

 

 

 

 

 

 

Upper

thread

is

not

Movable knife is not cutting cleanly.

Replace with a new one.

P. 95

trimmed.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fixed knife is not cutting cleanly.

 

Sharpen the fixed knife or replace it

P. 95

 

 

 

 

 

 

 

with a new one.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Adjust the position of the shuttle race

P. 92

 

 

 

 

 

 

Movable knife is not picking up the

thread guide.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

upper thread.

 

 

 

Adjust the needle bar lift amount.

P. 91

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Movable knife is not picking up the

 

 

 

 

 

 

 

 

upper thread because the last stitch is

Refer to "Skipped stitches occur".

P. 142

 

 

 

 

 

 

being skipped.

 

 

 

 

 

 

 

 

 

 

 

Movable knife position is incorrect.

Adjust the position of the movable

P. 93

 

 

 

 

 

 

knife.

P. 94

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sub-tension is too weak.

 

 

Turn the sub-tension nut to adjust the

Instruction

 

 

 

 

 

 

 

 

tension.

manual

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Poor

stitch

finish

on

Shuttle

race thread guide is

not

Adjust the position of the shuttle race

P. 92

underside of material.

separating the threads enough.

 

thread guide.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Incorrect tightening of the upper thread

Adjust the upper thread tension.

P. 89

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Upper thread length is irregular.

 

Adjust the sub-tension.

Instruction

 

 

 

 

 

 

 

manual

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Incorrect

tightening

of

Upper thread tension is too weak.

 

Adjust the upper thread tension.

P. 89

the thread

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Lower thread tension is too weak.

 

Adjust the lower thread tension.

P. 89

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Thread

take-up

spring

tension

and

Adjust the tension and height of the

P. 90

 

 

 

 

 

 

height are incorrect.

 

 

thread take-up spring.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Position

of arm

thread

guide

R is

Adjust the position of arm thread guide

P. 90

 

 

 

 

 

 

incorrect.

 

 

 

R.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Upper

thread

length is

Thread

take-up

spring

tension

and

Adjust the tension and height of the

P. 90

irregular.

 

 

 

 

height are incorrect.

 

 

thread take-up spring.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sub-tension is too weak.

 

 

Turn the sub-tension nut to adjust the

Instruction

 

 

 

 

 

 

 

 

tension.

manual

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fixed knife is not cutting cleanly.

 

Sharpen the fixed knife or replace it

P. 95

 

 

 

 

 

 

 

with a new one.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sewing

machine does

 

 

 

 

 

Check if the machine head switch cord

Instruction

not operate

when

the

 

 

 

 

 

is disconnected.

manual

power is turned on and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the

foot

switch

is

Machine head switch does not work.

Adjust the position of the machine head

P. 88

depressed.

 

 

 

 

 

 

 

 

switch.

 

 

 

 

 

 

 

 

 

 

 

 

If the machine head switch is

 

 

 

 

 

 

 

 

 

 

 

 

malfunctioning, replace it with a new

 

 

 

 

 

 

 

 

 

 

 

 

one.

 

BAS-311G, BAS-326G

143

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Brother BAS-311G service manual 143

BAS-311G specifications

The Brother BAS-311G is a state-of-the-art industrial sewing machine designed specifically for advanced garment manufacturing. This high-speed, fully automated model is engineered to meet the demands of modern production environments, offering exceptional performance and versatility.

One of the key features of the BAS-311G is its automatic thread trimmer, which significantly reduces downtime and enhances productivity. This machine is capable of cutting the thread at the end of each seam, ensuring a clean finish and minimizing the need for manual intervention. This feature is especially beneficial in high-volume production settings where efficiency is paramount.

The BAS-311G also boasts an advanced automatic needle positioning system, allowing users to set the needle to stop in the up or down position. This functionality enhances control over the sewing process, making it easier to pivot and maneuver fabric, which is crucial for intricate designs and patterns. This precision is a boon for manufacturers looking to improve the quality of their finished products.

Another notable aspect of the BAS-311G is its versatility. The machine is equipped with an adjustable stitch length feature, enabling users to customize stitches according to specific project needs. This flexibility allows for the production of a wide range of garments, from delicate fabrics to thicker materials, making it suitable for various industries including fashion, sportswear, and workwear.

In terms of technology, the BAS-311G incorporates Brother's pioneering technology that ensures smooth and reliable operation. The machine includes a digital control panel, which simplifies the selection of stitch patterns and settings. Users can easily navigate through options, making adjustments on the fly, which is crucial in a fast-paced production environment.

Built with durability in mind, the BAS-311G is engineered for heavy-duty use with high-quality materials that withstand the rigors of daily operation. Its robust construction ensures longevity and sustained performance, making it a wise investment for businesses seeking reliable machinery.

In summary, the Brother BAS-311G is an excellent choice for manufacturers looking to enhance their sewing operations. With features such as automatic thread trimming, adjustable stitch lengths, and advanced technology integration, it stands out as a top-tier industrial sewing machine designed to improve efficiency and quality in garment production.