10. TROUBLESHOOTING

Problem

 

 

Cause

 

 

 

Remedy

 

 

Reference

 

 

 

 

 

 

 

 

 

 

 

 

 

Upper thread breaks.

Upper thread tension is too strong.

 

Adjust the upper thread tension.

 

 

P. 89

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Needle is incorrectly installed.

 

 

Install the needle correctly.

 

 

Instruction

 

 

 

 

 

manual

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Thread is too thick for the needle.

 

Select a thread that matches the needle.

P. 89

 

 

 

 

 

 

 

 

 

 

 

Thread

take-up

spring

tension

and

Adjust the tension and height

of

the

P. 90

 

height are incorrect.

 

 

 

 

thread take-up spring.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Damage or burring of the rotary hook,

Repair or replace the problem part.

 

 

 

needle hole plate or needle.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Thread

breaking

from

heat

(Synthetic

Use a cooling tank.

 

 

Instruction

 

thread)

 

 

 

 

 

 

 

 

 

manual

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Thread is threaded incorrectly.

 

Thread the thread correctly.

 

 

Instruction

 

 

 

 

manual

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Lower thread breaks.

Lower thread tension is too strong.

 

Adjust the lower thread tension.

 

 

P. 89

 

 

 

 

 

 

 

 

 

 

 

Damage to corners of needle hole plate

Repair or replace the problem part.

 

 

 

or bobbin case.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Skipped stitches occur.

Clearance between needle

and rotary

Adjust the needle clearance.

 

 

P. 92

 

hook tip is too great.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Needle

and

rotary

hook

timing

is

Adjust the needle bar lift amount.

 

 

P. 91

 

incorrect.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The driver is covering the needle more

Adjust the driver needle guard.

 

 

P. 91

 

than necessary.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Needle is bent.

 

 

 

 

 

 

Replace the needle.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Needle is incorrectly installed.

 

 

Install the needle correctly.

 

 

Instruction

 

 

 

 

 

manual

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Needle is broken.

 

 

 

 

 

 

 

 

Adjust the needle clearance.

 

 

P. 92

 

Clearance between needle and rotary

 

 

 

 

 

 

 

 

hook tip is too great.

 

 

 

 

Adjust the needle bar lift amount.

 

 

P. 91

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Needle is bent.

 

 

 

 

 

 

Replace the needle.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Select a needle that is suitable for the

 

 

Needle deflection

 

 

 

 

 

sewing conditions.

 

 

P. 89

 

 

 

 

 

 

 

 

 

Reduce the sewing speed.

 

 

 

 

Needle is too thin.

 

 

 

 

 

Select a needle that is suitable for the

P. 89

 

 

 

 

 

 

sewing conditions.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Thread jamming.

Thread

take-up

spring

tension

and

Adjust the tension and height

of

the

P. 90

 

height are incorrect.

 

 

 

 

thread take-up spring.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Needle

and

rotary

hook

timing

is

Adjust the needle bar lift amount.

 

 

P. 91

 

incorrect.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Shuttle

race

thread

 

guide is

not

Adjust the position of the shuttle race

P. 92

 

separating the threads.

 

 

 

 

thread guide.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

142

BAS-311G, BAS-326G

Page 149
Image 149
Brother BAS-311G 142, Problem Cause Remedy Reference Upper thread breaks, Lower thread breaks, Needle is broken

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.