Brother BAS-342G Instruction Manual download pdf (Page 81)

13. TROUBLESHOOTING㩷

BAS-342G

Problem Cause Remedy Reference

Movable knife is not cutting cleanly. Replace with a new one. P. 61

Fixed knife is not cutting cleanly.

Sharpen the fixed knife or replace it

with a new one.

P. 61

Adjust the position of the shuttle race

thread guide.

P. 57

Movable knife is not picking up the

upper thread.

Adjust the needle bar lift amount. P. 56

Movable knife is not picking up the

upper thread because the last stitch is

being skipped.

Refer to "Skipped stitches occur". P. 71

Movable knife position is incorrect.

Adjust the position of the movable

knife.

P. 59

Upper thread is not

trimmed.

Sub-tension is too weak.

Turn the sub-tension nut to adjust the

tension.

P. 24

Shuttle race thread guide is not

separating the threads enough.

Adjust the position of the shuttle race

thread guide.

P. 57

Incorrect tightening of the upper thread Adjust the upper thread tension. P. 24

Poor stitch finish on

underside of material.

Upper thread trailing length is uneven. Adjust the sub-tension. P. 24

Upper thread tension is too weak. Adjust the upper thread tension. P. 24

Lower thread tension is too weak. Adjust the lower thread tension. P. 24

Thread take-up spring tension and

height are incorrect.

Adjust the tension and height of the

thread take-up spring.

P. 55

Incorrect tightening of

the thread

Position of arm thread guide R is

incorrect.

Adjust the position of arm thread guide

P. 56

Thread take-up spring tension and

height are incorrect.

Adjust the tension and height of the

thread take-up spring.

P. 55

Sub-tension is too weak.

Turn the sub-tension nut to adjust the

tension.

P. 24

Upper thread trailing

length is uneven.

Fixed knife is not cutting cleanly.

Sharpen the fixed knife or replace it

with a new one.

P. 61

Check if the safety switch cord is

disconnected.

P. 12

Adjust the position of the safety switch. P. 18

Sewing machine does

not operate when the

power is turned on and

the foot switch is

depressed.

Safety switch does not work.

If the safety switch is malfunctioning,

replace it with a new one.

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Brother BAS-342G Instruction Manual Page 81

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