Question about Singer 5050 Mechanical Sewing Machine

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The needle thread is blocked by a clamp/lever adjacent to the bobbin case. The needle thread breaks before one stitch is complete. Singer Model 771 Touch and Sew Please help. Thank you.

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  • anneaude May 17, 2008

    Your response spurred me on to do more searching on the web. My machine is 30 years old. (Singer Model 771) The bobbin rests in the bobbin case parallel to the floor.



    I did a search for "Singer 771 position bracket" and found a diagram at:

    http://www.tandtrepair.com/700Stuff/Free...



    Apparently an "eccentric stud set screw" needed adjusting!



    Thank you!

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Threading instructions for similar brother model:

http://www.mastersewusa.com/masmag11901_files/b114_471_721_771_XL711S_info_tg.htm

Possibly lever is to keep bobbin in place? If so, should slide left/right over top of bobbin.

Posted on May 14, 2008

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1 Answer

Does any one know anything about a sewing machine model 217-APP no 457. Think it may be a singer, have just found it in late mother-in-laws shed. It won't pick up the bobbin thread but runs ok


not picking up the bobbin thread is an indication of needle / hook timing
thread tension problems appear as a mess of stitches under the cloth
the timing can be checked by having the needle full down and the hook of the bobbin case should be at the needle just above the eye of the needle
if it is too early or late then it is not in position to get the thread

May 13, 2015 | Sewing Machines

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What to do when the thread keeps breaking


The top thread breaks
1. the needle thread is not threaded properly
2. The needle thread tension is to tight
3. The needle is bent or blunt
4. The needle is incorrectly inserted
5. The needle thread & the bobbin thread are not set under the presser foot when starting to sew
6. the threads were not drawn to the rear after sewing
7. The thread is either to heavy or to fine for the needle
8. Try a different spool or cone of thread
Bobbin thread breaks
1. There is a right way & wrong way to insert the bobbin in the case --when you insert the bobbin in if it doesn't stitch correctly turn the bobbin over see if that helps or bobbin case is not inserted correctly
2. Lint has collected in the bobbin holder
3. The bobbin is damaged & doesn't turn smoothly
4. Lower thread tension is two tight




Jul 10, 2014 | Singer Sewing Machines

1 Answer

My sewing machine singer 7256 giving me a problem causing my fabric underside stitches bird nesting and suddenly the bobbin case comes out from its place and thread strangles and stuck, Why?


try changing the needle-- Correct needle insertion is mandatory for proper use of your sewing machine.
Raise the needle bar to the highest point, then loosen the needle clamp screw to remove the old needle.
Place the new needle in the needle clamp with the flat side of the needle facing the back, (round needle, the groove in the needle should face away from the shaft).
Push the needle all the way up as far as it will go. Then tighten the needle clamp screw.
rethread the machine top & bobbin
make sure the thread has not come off the thread take up lever
also check the top thread tension
do you have a manual?

Jun 04, 2012 | Singer Sewing Machines

1 Answer

Janome help sewing spandex


Upper thread breaks
needle may be in backwards
Raise the needle bar to the highest point then loosen the clamp screw to remove the old needle, place the new needle in the clamp with the flat side to the back of the machine
Push the needle all the way up to the stop or as far as it will go, then tighten the needle clamp screw
upper tension may be to tight
the needle may be bent or damaged

Lower thread breaks
The most probable cause of lower thread breaking is improperly wound bobbin
don't wind the bobbin so full that it would be tight & hard to insert into bobbin case
bent bobbin--replace
thread catching on the bobbin spring or latch on bobbin case check to see that the bobbin is inserted completely & correctly & that you are using the right kind of bobbin .

May 22, 2012 | Sewing Machines

1 Answer

How to fix new home machine it model No.731016401. model 360 manufactured by Janome its not sewing cloths. The thread is placed properly but when i try sewing it starts to break the thread. it turns in...


Upper thread breaks
1.needle may be in backwards
Correct needle insertion
Correct needle insertion is mandatory for proper use of sewing machine.
Raise the needle bar to the highest point, then loosen the clamp screw to remove the old needle, place the new needle in the clamp with the flat side to the back of the machine or if using a round needle--the groove in the needle should face away from the shaft.
Push the needle all the way up to the stop or as far as it will go, then tighten the needle clamp screw
2.upper tension may be to tight--try 3 to 5
3.the needle may be bent or damaged--try rolling the needle on a flat surface to see if it's bent or not
4.thread may be hanging up in bobbin case--check area for loose threads or lint
???
Lower thread breaks
The most probable cause of lower thread breaking is improperly wound bobbin
1.always start with a empty bobbin
Never wind one color over the other
2.choose thread that is identical in color & type as the one to be used for upper threading
3.wind the bobbin evenly across & in layers
4.don't wind the bobbin so full that it would be tight & hard to insert into bobbin case
5.bent bobbin--replace
6.lint built up in the bobbin case--frequent cleanings will eliminate this problem, the more often you use the sewing machine the more often it needs to be cleaned
7.thread catching on the bobbin spring or latch on bobbin case, check to see that the bobbin is inserted completely & correctly, & that you are using the right kind of bobbin

also check the thread take up lever to make sure the thread has not come off of it cause that can make the machine jam up also

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1 Answer

My singer curvy 8780 has a timing issue the needle is scraping on the bobbin casement and will not sew,cleaned and oiled, changed needle turned off and on. any suggestions?


Good day!

please try this simple tips:

Good day!

A sewing machine operator can often help themselves when their machine does not operate properly.
Here are some simple instructions, which if properly used can save time and mechanics service calls.
TROUBLE;UPPER THREAD KEEPS BREAKING;
This could be trouble;================Do this;
1.Top tension to tight================loosen tension 1 turn
2.Machine improperly threaded=========check threading
3.Thread twisted on guide post========"
4.Thread twisted out of tension======="
5.Take up spring bent or broken=======Check action of spring
6.Thread jumped off pull off finger===Check threading
7.Needle bent or burred===============new needle
8.Bad cone of thread==================try another cone
TROUBLE;LOWER THREAD KEEPS BREAKING;
1.Bobbin tensionspring to tight=======Loosen tension slightly
2.Bobbin threaded wrong===============check threading
3.Bobbin wound to tight or uneven=====try new bobbin
4.lint or thread on bobbin case=======clean inside case
5.Lint or thread inside hook==========clean inside hook
6.Bobbin case nicked bent or burred===check/change case
TROUBLE;MACHINE STARTED SKIPPING STITCHES;
1.Needle bent or burred===============change
2.Needle set in crooked===============Check
3.Thread jumped off take up spring====check threading
4.Thread jumped off pull off finger===check threading
TROUBLE STITCHES SHOWING LOOPS;
1.Forming loops on top of cloth=======Tighten bobbin tension
======================================or loosen top tension.
2.forming loops on bottom of cloth====Tighten top tension
3.Bobbin placed in case incorrectly===remove and replace
4.Bobbin thread slipped from under====check threading of
tension===============================bobbin case
5.Lint or thread in top tension=======clean between tension discs


Thank you and good luck.

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