Reference Table In Trouble - Brother BAS-6150 Instruction Manual

Chapter 10 Troubleshooting

Reference table in trouble

Trouble
Upper thread breakage
Lower thread breakage
Uneven stitch
Stitch skip
Weak tension of threads
102
• Is the needle bend ? Is the needle point crushed ?
→ Replace the needle with new one.
• Is the needle correctly attached ?
→ Attach the needle correctly.
• Is the threading correctly performed ?
→ Refer to "How to thread the upper thread".
• Is the tension of upper thread too strong ?
→ Adjust the upper thread to correct tension.
• Is the clearance between the rotary hook and bobbin case opener correctly
adjusted ?
→ Refer to "Timing adjustment of needle and rotary hook".
• Is the timing of needle and rotary hook correctly adjusted ?
→ Refer to "Timing adjustment of needle and rotary hook".
• Is the threading correctly arranged ?
→ Refer to "How to thread the lower thread".
• Is the tension of lower thread correctly adjusted ?
→ Adjust the lower thread to correct tension.
• Is oil or waste thread stuck to the bobbin case ?
→ Get rid of waste thread or wipe put oil.
• Is the needle bend ? Is the needle point crushed ?
→ Replace the needle with new one.
• Is the needle bend ? Is the needle point crushed ?
→ Replace the needle with new one.
• Is the needle correctly attached ?
→ Refer to "How to attach the needle".
• Is the threading correctly arranged ?
→ Refer to "How to thread the upper thread".
• Is the timing of needle and rotary hook correctly adjusted ?
→ Refer to "Timing adjustment of needle and rotary hook".
• Is cut pieces of cloth clogged around the rotary hook ?
→ Clean around the rotary hook.
• Is the resilience and operational scope of thread take up spring proper ?
→ Refer to "Adjusting the thread tension spring".
• Is the tension of upper thread too weak ?
→ Adjust the upper thread to correct tension.
• Is the tension of lower thread too weak ?
→ Adjust the lower thread to correct tension.
BAS-6150
Check and corrective action