Brother LS-2125 Mechanical Sewing Machine - Page 9 - Answered Questions & Fixed issues

There are a few places online such as www.sewingpartsonline.com, or sometimes places like JoAnn fabrics, Sears local repair shops sell them. It is a class 15 bobbin case,

You could try adjusting the tension on the bobbin but it rarely needs adjusting.
Have you checked that all the top tension discs are clean? Often a tiny bit of broken thread causes problems. Pull a thick piece of thread manually through all of them or prise gently open and look. Take out the bobbin case and put the hoover end in the empty space to **** out any stray threads, or shoot compressed air in there to blow it clean.
Remove the needle plate and check for broken threads underneath.
Try re-threading the whole thing and remember to keep the presser foot up as you do it to keep the top tension discs released.
I have found that a blunt needle can also cause this problem....no idea why.

Have you oiled your machine recently, perhaps something is stiff. Your manual should tell you where to oil. Good luck.

Here are some things that may fix the problem:
1. First, replace the needle
2. Next, remove the thread and completely rethread the machine
3. Remove the bobbin, clean any lint or thread from around the bobbin, and replace it.
Try sewing again on scrap fabric.
I hope this helps.

Did you thread it when the pressure foot was up? It must always be threaded with the pressure foot up as this disengages all the tensions. Also try re-threading as sometimes the thread misses a tension disc. If the bobbin is threaded wrongly it can also cause thread pulling. If the thread is poor quality it may have knots that cause this problem.

I would suggest removing all threads and cleaning between any visible tension discs incase there is a piece of broken thread stuck in there, then re-thread the whole machine with pressure foot up.

Check that the thread is tight around the bobbin. Make sure that the bobbin is in the right way around - the bobbin thread should double back on itself coming out of the bobbin holder. The bobbin tension adjustment is the small screw in the plate on the bobbin case that the thread passes under as it comes off the bobbin and goes out.

Firstly please check that the needle is in the right way, flat shank to the back, and is fitted all the way up into the needle holder. This will affect stitch formation as the scarf at the back of the needle is where the rotary hook moves to catch the thread from the bobbin to form the stitches. A new needle never hurts either, should put in a new one for every new sewing project as they last only 4-6 sewing hours before they start to go blunt.

If this isn't the problem, then perhaps the timing is out, have you stitched into something, a pin or the sewing foot by accident to knock the timing out?

If so, time for a trip to the mechanic.

sounds like your thread is getting caught in the thread spool's thread keeper notch. Make sure you use the spool holder disk with the closest size to the spool of thread to help prevent that. This is pretty common with old fashioned spools like coats and clark spools.

My brother suggests that i make sure the spool unwinds in a certain direction. You might check your manual to be certain the thread is unwinding the correct way.

Good luck.

Always pick the needle type and size according to the fabric that you are sewing. I'm assuming if you are "patching" you might be using an iron on patch product on the underside of the garment and you should try to use a similar weight to the garment's fabric weight to do this.

If you are patching denim for example, you'd use a "denim" needle (teflon blue coating to slide through the fibres better) if you can, probably size 90 or 100. If you don't have a denim needle then just a regular 90 or 100 needle will suffice.

If sewing knits, use a ballpoint needle. For leather and vinyl use a Leather needle, these have a different shaped tip to piece the leather.

Try this link for more good general info on needles http://sewing.about.com/od/sewingmachineindex/ig/Sewing-Machine-Needles/ you might want to print out the section on sewing machine needle sizes and pin up in your sewing room.

My sewing needle selection is over 25 different needle packs and I probably buy 4-6 packs a year to ensure I've got the right size on hand. Change your needle for every new project - a needle stays sharp for about 4-6 sewing hours then should be replaced. If you are hearing squeaking or popping noises, your needle is blunt, chuck it.

In the words of my sewing mentor Wendy "Dont spoil the ship for a ha'pworth of tar" .

check your needle and turn it the other way from how you have it.that will correct your problem or the loose the knob that hold the needle and pull out the needle a little out more.then you tighten the knob back.good luck.

Totally rethread, and insert a new needle (flat side facing away from you). Sometimes, the needle gets a burr on it or is bent without you seeing it. When you rethread, (with the presser foot up, always) pull the thread, it should move smootly, now lower the presser foot, pull thread again, it should barely move. This should seat the thread in the tension discs.

1) Check the needle or replace with a new one. A needle has a groove in one side of it and that is the side that the thread enters the needle. Some thread from the side and some from the front.
(2) Before sewing, manually turn the wheel to make the needle go down while holding the needle thread with your left hand. When the bottom thread pulls up, pull both threads toward the back of the machine before sewing.
(3) Make sure your pressure foot has been lowered. Sounds silly, but if you lift is high it might just look like it is engaged.
(4) Try it on two ply fabric first and try both a straight stitch and a zig zag and see if you have problems with both.
(5) Make sure your thread is really machine thread and not hand sewing thread.
(6) Make sure the bobbin thread is feeding off the bobbin spool in the right direction.
(7) Anything other than these is probably a tension problem or a timing problem.

If the machine is as mechanical as it looks and you describe, you may get away with replacing the motor, the foot control and the bulb, however, if there are any electronics, and the specs seem to say there are not, these will be blown as well and will need replacing. For now go with the first three items mentioned and see what happens.

Look on the back of the machine there is usually a tension dial. Try adjusting that. I f that does't work your manual lists instructions for cleaning and oiling a little bit of oil in the right place works wonders or on the oher hand a little thread in the wrong place will stop an electric motor.

Hi, take the top of the machine cover off by removing screws on top plastic cover. Make sure that the rubber ring on the wheel that turns the bobbin threader is making contact with the belt from the flywheel in the back. You may need to see if it turns freely. If not take it off and lubricate it until it frees up and then replace it and the cover.

It sounds as if your machine is either threaded incorrectly, and or your tension is off. I would start by making machine is cleaned and oiled, then I would rethread the top and and make sure the bobbin is wound correctly.

Check the power wiring, especially where it goes into the machine. Is there a connector inside that may have pulled apart? If you have a continuity tester, find the power cord terminals and check for continuity between those and the prongs on the plug, or use a voltmeter or "voltage sniffer"* to check for voltage on the terminals with the machine plugged in.

*Voltage sniffer: a gadget that chirps and flashes a red light if it is brought near an energized AC wire. It comes in various forms, e. g., inside a penlight, screwdriver handle or wire cutter handle. A fox and hound type circuit breaker tracer should also work if the "fox" is plugged into the same outlet as the sewing machine.

Forcing the wheel while trying to break the thread most likely bent an internal component. Starting from page 50 on this PDF link http://www.brother-usa.com/ModelDocuments/Consumer/Users%20Manual/UM_LS_2125_EN_272.PDF you can open the machine and inspect the components for damage.

the thread goes in the front thru the eye of the needle & out the back of the needle

The brother website has free operation manuals
On the home page,, on the left hand side down towards
The bottom look for PRODUCT MANUALS
Click on it & it will take you to another page where you can
Pick your model number & download the manual

This is how I do it. Rotate the machine by hand until the needle is at the lowest point that it travels. Now tighten the bobbin casing set screws with the thread hook slightly ahead of the needle. As the needle begins to rise the hook should pass by it and grab the needle thread and loop it around the bobbin. Be patient. You may have to adjust it several time before you get the timing back to perfect.

Good Luck!!
Chris
glfi.com

Go to www.brother-usa.com and under support, click home sewing and embroidery, then find your model number when the drop down menu comes down. You can download it for free and save it to your computer. Try your tension at 3.