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I read the emails, sin e I am in the group, but have never written. I am getting g the message retread broken thread. Cleaned throughly the bobbin case and area, cleaned the upper thread take up area. Took off the little cover on top and cleaned the brush and surrounding area. Still get message. I was told to clean the sensors, but where are they!! Before I take it to my technician, thought I would see if you had any suggestions. Thanks.
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Jim Stutsman
As you have discovered, no amount of cleaning will help this. This is a sensor issue. After threading the machine, open the door at the left end. Looking in there, you will see an oval hole, which I usually say is kidney shaped. If you’ve never had an actual kidney out for inspection, think kidney bean. Sticking out of that hole is a small metal rod. It moves back and forth as the needle goes up and down. If it doesn’t move, you get the broken thread message. There are a few possible things that can cause this:
- There is a ring of felt, or rubber, around the edges of that hole. I’ve seen a few times when it got pulled loose and jammed the rod so it couldn’t move. Fixing it is not difficult with tweezers and patience, to just reposition it around the edge. If it actually fell into the hole it will require removing the tension, which is a big job for a technician.
- A second issue happens at the bottom of the thread path, the point where it makes a U-turn back to the top. If the thread happens to not quite get into the slot, and instead stays on top of the plastic under the U-turn symbol, it can wear in a small groove. That makes it easier for the thread to get caught the next time, and eventually it may catch there every time. Lay the machine on its back, and you can see if it’s hanging up there. There’s not much of a practical way to fix this, but just use care to make sure the thread goes in every time.
- Again with the machine on its back, you’ll notice that when threading there is a spring just before the U-turn. This is called a check spring. It’s job is to keep the thread taut as the needle goes up and down, and it will move accordingly. If the spring is broken or not moving, that will also cause the message because slack thread will not move the rod mentioned in step 1.
- If the thread comes out of the take-up lever, you can also get this message, although you’ll usually have a bird-nest under the bobbin case first. When you thread, there is a small clip on the take-up lever to keep the thread from coming out. If the clip is broken or missing, the thread can come out easily.
Those are the most common causes. If none of them help, you’ll need the technician.
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Thank you. I will try to go thru all of these. Belated happy birthday.
As you have discovered, no amount of cleaning will help this. This is a sensor issue. After threading the machine, open the door at the left end. Looking in there, you will see an oval hole, which I usually say is kidney shaped. If you’ve never had an actual kidney out for inspection, think kidney bean. Sticking out of that hole is a small metal rod. It moves back and forth as the needle goes up and down. If it doesn’t move, you get the broken thread message. There are a few possible things that can cause this:
- There is a ring of felt, or rubber, around the edges of that hole. I’ve seen a few times when it got pulled loose and jammed the rod so it couldn’t move. Fixing it is not difficult with tweezers and patience, to just reposition it around the edge. If it actually fell into the hole it will require removing the tension, which is a big job for a technician.
- A second issue happens at the bottom of the thread path, the point where it makes a U-turn back to the top. If the thread happens to not quite get into the slot, and instead stays on top of the plastic under the U-turn symbol, it can wear in a small groove. That makes it easier for the thread to get caught the next time, and eventually it may catch there every time. Lay the machine on its back, and you can see if it’s hanging up there. There’s not much of a practical way to fix this, but just use care to make sure the thread goes in every time.
- Again with the machine on its back, you’ll notice that when threading there is a spring just before the U-turn. This is called a check spring. It’s job is to keep the thread taut as the needle goes up and down, and it will move accordingly. If the spring is broken or not moving, that will also cause the message because slack thread will not move the rod mentioned in step 1.
- If the thread comes out of the take-up lever, you can also get this message, although you’ll usually have a bird-nest under the bobbin case first. When you thread, there is a small clip on the take-up lever to keep the thread from coming out. If the clip is broken or missing, the thread can come out easily.
Those are the most common causes. If none of them help, you’ll need the technician.
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Thanks. While I was checking the kidney shaped hole with little lever inside (all fine), I noticed some thread wrapped around one of the levers that go up and down. Managed to get it out with the twizzers. Seems to have resolved the problem!! If I hadn't even looking in their per your suggestion, I would have never noticed!! Many thanks. Have a great evening.
Thank you. I will try to go thru all of these. Belated happy birthday.
As you have discovered, no amount of cleaning will help this. This is a sensor issue. After threading the machine, open the door at the left end. Looking in there, you will see an oval hole, which I usually say is kidney shaped. If you’ve never had an actual kidney out for inspection, think kidney bean. Sticking out of that hole is a small metal rod. It moves back and forth as the needle goes up and down. If it doesn’t move, you get the broken thread message. There are a few possible things that can cause this:
- There is a ring of felt, or rubber, around the edges of that hole. I’ve seen a few times when it got pulled loose and jammed the rod so it couldn’t move. Fixing it is not difficult with tweezers and patience, to just reposition it around the edge. If it actually fell into the hole it will require removing the tension, which is a big job for a technician.
- A second issue happens at the bottom of the thread path, the point where it makes a U-turn back to the top. If the thread happens to not quite get into the slot, and instead stays on top of the plastic under the U-turn symbol, it can wear in a small groove. That makes it easier for the thread to get caught the next time, and eventually it may catch there every time. Lay the machine on its back, and you can see if it’s hanging up there. There’s not much of a practical way to fix this, but just use care to make sure the thread goes in every time.
- Again with the machine on its back, you’ll notice that when threading there is a spring just before the U-turn. This is called a check spring. It’s job is to keep the thread taut as the needle goes up and down, and it will move accordingly. If the spring is broken or not moving, that will also cause the message because slack thread will not move the rod mentioned in step 1.
- If the thread comes out of the take-up lever, you can also get this message, although you’ll usually have a bird-nest under the bobbin case first. When you thread, there is a small clip on the take-up lever to keep the thread from coming out. If the clip is broken or missing, the thread can come out easily.
Those are the most common causes. If none of them help, you’ll need the technician.
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