Question about Brother PE770 Computerized Sewing Machine

1 Answer

When top thread goes down to pull bobbin thread up, I hear a strange noise, then the top thread breaks. Help!?!?!?

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Brother Master
  • 1,564 Answers

Check your needle, your needle plate, bobbin, bobbin carrier and shuttle for burrs. smooth with fine sand paper if you find any. If it's a needle... change it.

Good luck

Posted on Nov 12, 2012

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Thread in needle or bobbin keeps on breaking

The tread only breaks in the needle. what can i do . i don't get to sew anything . I tread the needle and get everything ready and start the machine and as quickly as that the tread is broken and the machine has not sewn at all.

Posted on Apr 07, 2009

bargainbox
  • 1388 Answers

SOURCE: Huge loops on back of fabric!

Please TRY the solution BEFORE giving your considered rating.
Specific detail on bobbin case adjustment (with picture) near halfway down reply, the remainder will help you achieve a balance of top and bottom tensions.

Ensure that all is clean and free of lint and jams, this is the most likely cause....now for tension troubleshooting .......

This solution is for tension problems...if you cannot form any sort of stitch, the issue is quite different, so please let me know if you need a different problem solved.....

It is quite long, but just work through each section in order.

The "knotting up" can reveal a lot. If you have loose threads on one side or the other, the tension on the opposite side will be the culprit.

QUICK SUMMARY FIRST:
Ensure sharp new needle,
Thread guides and Bobbin are Clean & Clear of lint
Set Top Tesion to 4 ....then....
Balance Bobbin to suit.

TOP THREAD TENSION:
If the looping threads are on the underside as you sew, it is the top tension. Top tension ought to be between 4 & 6 (this variation to allow for the different weights of fabric in your projects).

IS YOUR NEEDLE SHARP ?
If you are using a needle that has seen quite a deal of work, or you suspect it may be blunt, change it for a new one !

TOP TENSION & GUIDES:
Make sure that when you thread the machine the presser foot is up so the thread goes between the discs and not to one side, top tension between 4 and 6, and that you have threaded through all the guides, including the last one, usually on the needle arm, just above the needle clamp.

It may be there is lint trapped between the discs, this will keep them slightly apart and reduce the actual tension, sometimes dramatically.

If tensions appear correct, and the thread is definitely in the channel between the discs, but still too loose and looping, try raising presser foot and remove your thread.

Now, with a 2" (50mm) wide strip piece of fabric 8 - 10" (20 - 25cm) moistened with methylated or denatured spirit, gently insert the fabric strip and clean between the discs with a see saw / to and fro action.

In the worst cases, gentle use of a needle to pick & remove the jam may be necessary, but be very gentle and make sure the tension is set at Zero and the presser foot is raised, (to disengage tension plates).... do not gouge or score the plates, they need a polished surface to work correctly.

BOBBIN TENSION:
Far less common, but if the loose threads are on the top, it is bobbin tension that is loose, it too may have lint in the spring and be giving a "false" tension.

I would not recommend fiddling with bobbin tension without good reason, it may end up with missing small screws and spring pieces, however, you can take the needle plate off to clean
the hook race area (where bobbin case sits)

...this is just good housekeeping, my wife does this every time she replaces the bobbin....

just take it out and clean the bobbin case and the fixed metal hook race with a small brush to remove lint. If there is a significant amount of lint, use a vacuum and small brush to get the worst.

Then wipe all this area with a cloth or cotton bud (Q tip) moistened (not soaked) with methylated spirit, especially if there appears to be fine dirty deposits....oil and lint combine to conspire against you.

If it seems likely that you ......really ....do .....actually .....need .....to adjust the bobbin case, first check there is no lint trapped in the metal spring where the thread is tensioned.

TOP LOADER:
Drop-in Bobbin case will look similar to this image with the tension screw in the middle of the metalwork....

4c76dc1.jpg ...the other screw at one end is holding it all together, so beware....it is not a tragedy to undo the whole lot and clean it, but very gingerly and lay the bits out in sequence and orientation, or you risk tearing your hair out !

FRONT LOADER:
....this is a bobbin case from a front loading machine and works in a very similar fashion to the top loader with drop in bobbin, again, if you dismantle it, take care so you can put it all
back properly.
165ca5c.jpg FINISHING UP
GETTING THE BALANCE RIGHT:
When you are certain there's no trapped lint in top tension or bobbin, set the top tension to 4 and the bobbin tension to a point where you just begin to feel resistance.

Try using good quality thread of contrasting colours so you can more easily spot the changes.

Set your zigzag to one width less than maximum (eg. 5 of 6 ...or... 4 of 5 etc) and sew a sample for a few inches and check the result.... adjust the bobbin tension screw very little at
a time, perhaps 1/16 of a turn.

You may find you are playing with this balance for some little while and if you are putting the needleplate on and off each time begin to think it cannot be correct to do this.....BUT....it is,
and eventually, you do get a "feel" for the correct tension and then it happens quite quickly.....as a user you won't be doing it very often unless there is lint built up (or are there small hands at work around the house !?!?!)

OTHER ISSUES:
If you live near the ocean as we do, salt air can play havoc with metalwork inside and out, so to help minimise this, keep a few small packets of dessicant (silica gel) in your machine
case....no case ? then make some sort of cover !

Same applies in any damp or humid environment, keep your machine dry and dust free.

Budget for a proper full service every couple of years (more often if heavily used) and if you don't use your machine for a few years, be aware that old oil will dry out and combining with
dust and form a "clag" like glue (another reason for some sort of cover, even a teatowel !)

FINALLY, A WORD ON THREAD:
If it is worth spending the time, energy and money on making something that you would like to give lasting enjoyment......use quality thread, .......it may seem to cost a little more at the
time, but the results, ease of use and added longevity will be worth the extra, and as a bonus, your tension troubles may be fewer and further between, because there is a more consistent diameter with good thread, and less compensating to be done by your tension plates and less thread breaks !

bargainbox.com.au

Posted on Aug 02, 2009

  • 1 Answer

SOURCE: I have a pc-8500 and

have a brother 8200 upgraded to a 8500. The touch screen seems to move to the right after some use. Is there a way that I can fix this or does it have to go to the shop.

Posted on Aug 23, 2009

  • 1116 Answers

SOURCE: how do you thread bobbin for Bicor VX1005?

Look through these threading guides for a Brother that has the same features. http://www.sewusa.com/Sewing_Machine_Threading_Diagrams.htm

The above site has a manual, but I not a threading guide. Unless it is the same as another model.

Posted on Mar 07, 2010

  • 1116 Answers

SOURCE: Bobbin thread bunching up.

Thread the machine with the presser foot up and see if this will remedy the problem.

If not, refer to the manual to be sure the threading and bobbin are set up as they should be.

If the bobbin thread and top thread continue to not link together, it could be the timing needs to be adjusted.

In this case, take the machine to a Brother dealer for service along with a sample of the stitching.

Posted on Apr 01, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

3 Answers

How do I set a straight stitch? What is causing the top thread to break?


You do not say which machine you have. As for a straight stitch, make sure the needle is central and not in zig zag mode.
The thread can break for several reasons, such as. Incorrect tension.
:Wrong thread for the material.
: Thread in bobbin different from the top thread.
:Old thread.
: Not threaded correctly.
: Needle not inserted correctly, or incorrect needle.or the thread could be wound around the spool holder pin,
Try removing the spool and turn it around.
Hope this helps.

Mar 02, 2015 | Sewing Machines

1 Answer

How do I change the bobbin in a Janome sewing machine?


There is a small plastic plate where the needle goes down through the foot, remove this cover and you will see the bobbin. Remove the bobbin and refill or selecting another bobbin turn it so that when you pull the thread the bobbin turns anti-clock-wise, slip the bobbin into the black plastic casing, pulling the thread towards the small red arrow at the bottom of the casing, slip the thread between break in the silver metal sleeve pulling it to your left between the 2 pieces of metal this is where the tension on the thread is. You have now changed your bobbin. With the plastic plate still off, hold the top thread with your left hand and with your right slowly turn the wheel, this will send the needle (holding your top thread) down into the bobbin casing and will pick up the bottom thread, pull on the top thread and bring the bottom thread up through the hole in the plate. Replace the plastic plate and recommence sewing. Good luck
Sue

Sep 24, 2014 | Janome Sewing Machines

1 Answer

Sewing machine


The top thread is probably breaking due to the bobbin thread tangling.
First-off fit a new needle .... do that anyway ! And if you haven't recently cleaned your machine (and you should do it every week as a minimum), clean-out under the stitch plate, remove the hook, clean the hook race and give it a small drop of oil, even if you're using the lightweight plastic hook/shuttle. Check that you have adequate bobbin tension ... when you pull the thread out of the bobbin case there should be a bit of resistance --- technically, this should be set-up using the correct tool and a set of weights, but if there is no, or very little resistance, you need to increase the bobbin tension a little bit at a time using the small screw that holds the tension spring down onto the bobbin case. This is a very fine adjustment, so you may find you only need to turn the screw less than a quarter turn to get it right. Ensure that, when you thread the top thread up, you do-so with the foot lifted so that the thread goes down properly between the top tension discs.If you're still not getting anywhere, check the basic timing/needle depth by looking at some of my other posts on the subject.

Nov 26, 2011 | Bernina Activa 140

1 Answer

Elna 2007 sewing machine breaking upper thread in bobbin unit. It will be going along fine then the thread will snap. thread tension on 1. zigzag stitch. Thread passing through upper machine OK, but...


Is your top thread tension on 1? this sounds way too loose, should be 4 or 5.
This is a horizontal top loading bobbin machine isn't it like the Janomes?

Do you have a manual for it? It sounds to me like the top thread is too loose and as it is pulled down and around the rotary hook there is no tension on it to pull it back up through the fabric and form a stitch which is then causing it to jam. Then once youve gots bits of thread in there, its just jamming and jamming. Cleaning out the bobbin holder as you described is good, you may need to do it again and ensure all bits of thread are out of it.

I think you need to revist all the threading up and ensure that the top thread is under tension, try number 5. Also check that bobbin is correctly wound nice and smoothly, then loaded into the bobbin holder correctly so that the thread is coming off the bobbin spool in the right direction, ie thread needs to come off the bobbin, then reverse direction in a "v" shape, usually in the direction of the back of the free arm. And that the thread has been clicked into the tension spring fully, put the thread into the slot of the tension device and press down on it with your finger tip until you hear it click into tension.

Also double check the take up lever, if the thread has slipped out of this, it will jam up for sure.

If you don't have any manual for this then try www.sewusa.com, there is good troubleshooting tips and threading diagrams for lots of makes and models.

Hope this helps you, persever, its most likely threading/tension issues and can be overcome with the right settings.


Aug 15, 2011 | Elna 2007 Mechanical Sewing Machine

1 Answer

Necchi 535FA--the tension seems to be off. The thread keeps breaking or pulling out of the needle. When i sew on cotton it was working then when I switched to a stretchy faux crushed velvet the tread...


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.

Jun 06, 2011 | Sewing Machines

2 Answers

The top thread continues to break once I begin sewing. I have done all the recommended changes (tension controls, etc.) Everything is threaded correctly. It appears the top thread or the bobbin thread...


I know you've said you have checked the tensions but that usually is the problem. When you pull on the top thread after it goes through the tension but before you thread it through the needle is there some tension but not so much that it breaks when you gently pull on it? It will be a bit harder to pull it at the point after it goes through the needle but it should have a bit of give there too without breaking.

Also check the bobbin again. Take it out of the machine and examine how the thread is wound around the bobbin. Is it all criss crossed or is it fairly evenly wound? Is it in the right direction and through the tension slot? Now dangle it by the thread while in the bobbin case. It should not just reel out to the floor but should slip a bit with some tension and hang there. A slight **** of the wrist should cause it to release a bit more thread and drop a bit more to the floor. It should allow slip but it shouldn't just reel out fast.

When you reinsert the bobbin case into the machine you should feel/hear a slight click as it catches into place.

Also check the needle though that usually isn't what causes this kind of problem.

The thread will break when it has no 'give'. Either the tensions aren't quite right or it is catching somewhere along the way through the various guides where you thread it. Oh and make sure the spool itself is freely turning on the spindle! Sometimes it is because of catching at that point and simply turning the spool upside down so it can't catch will solve the problem ! :)

May 24, 2011 | Simplicity Pioneer II SA200 Mechanical...

1 Answer

I have an elna lotus sewing machine and have refilled the bobbin but cant remember how the bobbin goes back into its place. the machine will sew for awhile and then the cotton gets tangled .can you help...


Is this a Swiss made Elna Lotus with top loading bobbin (check machine plate on right beside power inlet for manufacture details) ? (the original Lotus was released back in 60's but that name has been reused on a number of different models since, some made under licence elsewhere) If yes, then the following applies:

Bobbin should have holes on one side only, always wind it with the holes on top and load it into the bobbin holder the same way so it is rotating anti clockwise when you pull the thread.

Drop wound bobbin into bobbin holder and, while holding the bobbin still with one finger, pull the thread tail towards you into the tension spring, then press down on the thread until you hear it "Click" into the tension spring.

Then hand wind the fly wheel towards you while holding the top thread tail to catch the bottom thread and bring it up to the top needle plate, close the back sliding plate over the bobbin.

Other thing with these machines is ALWAYS hold the two thread tails firmly when you start a new seam so the threads don't get pulled down into the bobbin holder area. Really important.
You can dowload a manual from www.arizonaexpressionz.com for most of the Swiss machines.

If it is not Swiss made one, then your bobbin may be vertical front loading (like the Brothers).

There are threading diagrams for lots of machines at www.sewusa.com, there might be one there that covers your machine.

May 22, 2011 | Elna Sewing Machines

1 Answer

The tension on the bobbin is giving big loops and then breaking


This could be one of the following:
  • wrong bobbin for the machine
  • bobbin loaded the wrong way - must rotate anticlockwise when you pull the thread
  • thread not into the tension spring/device on the bobbin holder correctly
  • bobbin wound badly, uneven tension, loose or uneven across the bobbin
  • poor quality or old dry brittle thread could cause the breaking (but the loops is definitely tension issues).
This is a top loading bobbin machine machine and you can download a manual from
http://www.singerco.com/accessories/manuals.html

Here is the threading diagram from the manual.

tally_girl_21.jpg It is important to click the thread down into the tension spring on all top loading bobbin machines and then pull gently on the thread to check that it is under tension, you should feel firm resistance when you pull the thread. If not, then take it out, and try again.

Other thing to look at is how the bobbin is wound. It is necessary to wind a bobbin smoothly and with some tension on the spool as the thread comes off it. Best analogy is the garden hose reel. If you wind it up and don't control where the hose goes onto the reel it will all lump up in the middle, and you won't get all the hose onto it. And then when you go to pull the hose out, it will jam and be difficult to pull. Same with bobbin thread. You want a nice neat even fill across the whole width of the bobbin, not just the middle. To achieve this make sure you use the bobbin winder tension disc when winding. Also use the spool cap on top of the thread spool to stop it from bouncing around as it unwinds - the thread will then wind off around the spool cap and this keeps it running smoothly and not twisting and jerking. If you don't have a spool cap then put the curved handle of a pair of scissors on top of the thread spool to tension it while you wind the bobbin. Also watch the bobbin as it winds, give the thread a nudge with your finger to control the fill onto the bobbin so it winds top, bottom and middle of the bobbin evenly.

I would suggest the following:
clean out the race following the manual directions to remove the bobbin holder, clean in this area, replace it. Wind a fresh bobbin and then load it into the machine, following the manual instructions carefully. Also thread the top of the machine following the manual, put in a new sharp needle from the pack, turn the top tension dial to a medium number (often 5 if dial goes from zero to 10).

Now test sew again. Look at the seam, if you have loops on the bottom of the fabric, underside, then the top thread tension is too loose or not in the top tension discs fully. Generally you should not need to adjust the tension on the bobbin thread for these machines.


Apr 13, 2011 | Singer 5050 Mechanical Sewing Machine

1 Answer

Thread breaking.


Rethread the machine following these directions:
all machines thread the same. TTN tension, take up, needle.
Beginning with the spool, guide the thread through the thread guides to the tension assembly. Pull the thread through the tension assembly and test it to make sure the tension is working correctly.
(To do this test, adjust your tension setting to normal or medium or 5 or something in the middle. Raise the presser foot and pull the thread through the tension. It should pull easily!! Lower the presser foot and pull the thread. It should pull noticeably harder.) If it passes this test, continue up through the take up lever,then down through the thread guides to the needle. Make sure your needle is fully inserted and turned the correct way.( If you load your bobbin case from the left side,the needle rule is normally FLAT to the RIGHT is RIGHT. There are some exceptions. If you have a newer style drop in bobbin or your bobbin case loads in the front then the rule is FLAT to the BACK.
Remove the bobbin case and bobbin. Pull on the bobbin thread to make sure it doesn't pull too hard. It should have some tension on it but not a lot. Insert the bobbin and bobbin case into the hook assembly and pull on the bobbin thread again.The tension should still be about the same. If it is tight, you need to look at the bottom of the pin that the bobbin case sits on and see if there are any threads looped around it. If there are , you need to remove them.
Hold the top thread , turn the hand wheel and see if the thread is catching someplace around the hook assembly. If it pulls the thread up easily, put some fabric in it and see how it works.
Make sure the thread is through the take up lever.
sewman7

Sewman7

Jul 09, 2008 | Euro-Pro Fast and Easy 420 Mechanical...

Not finding what you are looking for?
Brother PE770 Computerized Sewing Machine Logo

77 people viewed this question

Ask a Question

Usually answered in minutes!

Top Brother Sewing Machines Experts

Tally Girl
Tally Girl

Level 3 Expert

1122 Answers

Les Dickinson
Les Dickinson

Level 3 Expert

18389 Answers

Irene Tulloch

Level 2 Expert

458 Answers

Are you a Brother Sewing Machine Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...