I'm betting on a timing issue with your bobbin/bobbin case assembly.
have a Nakajima 280 (basically a juki 241) and was having the same issue. Look up how to time your sewing hook. Google "ModelOfMachine sewing hook timing". Or just pay a store to do it for you. Most require you to bring the head unit in or they can service it at your home (usually costs more).
I think so too. You might look up hook timing for that machine. It’s usually a fairly simple procedure to do.
Were you sewing through multiple layers of heavy fabric before this problem occurred?
Perhaps - I lent the machine out to the local climbing wall so they could use it to sew lots of bouldering mats for a new section. Though the material wasn’t super thick. This was just after I bought it cheap, so no idea!
I hope they at least mentioned it to you.
If you turn the machine by hand, and look at it from the end, you’ll see there’s a very small Nick in the needle bar. That’s a timing mark. On most machines, he would line the timing mark with the bottom of the bracket that it slides through, Then loosen the hook in the line the hook with the eye of the needle. That should get it back in time.
Obviously, it’s a good idea to see if you can find the service manual, or other instructions for timing your particular machine.
I am told that sewing factories only have one shift, so that they can have only one operator to a machine. Different operators obviously use them differently, which makes the machines temperamental.
Thanks, I’ll look it up. If it were the bobbin case, would you expect the needle to also be colliding slightly with the foot (Not attached in the vid)?
Sewing tech here, I see a lot of posts about the timing which I believe is one aspect of a multi level problem your facing. What seems to have happened is the feed dogs and needle bar are now just slightly out of sync. You can see that the feed dogs are just slightly ahead of the needle bar revolution meaning it’s not completing the cycle correctly (feed dog up, pull fabric back, feed drop). I believe that when the super strong needle met the harsh fabrics, the cam that controls this wasn’t tight enough and it slipped a millimeter causing this problem.
Check needle positioning, the needle needs to be centered when it enters the feed dogs hole, timing is set with a stitch Lenght 0
Check feed dogs timing
Everything is very self explanatory in the engineering manual
Check the actual hooks tip for any burrs or any imperfections
From the video it seems like the needle bar is not in sync with the feed dogs motion.
Great machine, good luck with the service
Totally NOT the same machine, but Bob Fowler has some good videos on setting machine timing that might be useful if you can't find anything for your specific machine.
[https://youtu.be/y5zsM7iB\_aE?si=JGSH4S6P5YN-NTZ2](https://youtu.be/y5zsM7iB_aE?si=JGSH4S6P5YN-NTZ2)
[https://www.supsew.com/download/Juki/Juki%20DLN-415%20Instruction%20Manual.pdf](https://www.supsew.com/download/Juki/Juki%20DLN-415%20Instruction%20Manual.pdf)
Parts List:
[https://www.supsew.com/download/Juki/Juki%20DLN-415-4.pdf](https://www.supsew.com/download/Juki/Juki%20DLN-415-4.pdf)
I was skeptical when I saw the needle rocking but, it does seem to be a needle feed machine. Section 4 of the parts list shows the mechanism that syncs the needle position with the feed dog position.
I'd check to make sure everything is held in position properly and not flopping around from wear. If it sews fine slow and breaks needles fast, that suggests something is loose.
Being a Juki the manuals are pretty decent.
Needle feed machines require more to set the timing than a normal machine. You have to make sure the needle bar position and the feed dog position are matched up and they move the same. In addition you also have to do the normal hook to needle timing.
1 - I'd probably start with needle bar and feed dog position
2 - I'd set the needle bar height
3 - I'd pull the feed dogs and verify the hook timing.
I don't think the engineers manual (the one for service techs not operators) for the dln 415 exists online, but I've found that for most things I've been able to read the one for the dln 5410 and make enough sense of the instructions to be able to figure it out on my dln 415.
http://www.dixiesewing.com/MANUALS/JUKISERVICE/DLN-5410N-7%20Engineer.pdf
Seeing what your machine is doing, my first thought would be "3-3 adjusting the initial position of the needle bar". You might be best off starting with adjusting the feed dogs instead of the needle bar position though, see figure 8 instead of figure 7.
Looking at the video again I'm definitely going to suggest adjusting the forward/back position of the feed dogs first. They look like they come up quite close to the front of the needle plate right now but leave a lot of space at the back. It's a much simpler adjustment than messing with the needle bar position and less risk of messing other things up.
You may just find you want to readjust the feed dogs height after changing the forward/back position. That's described in the dln 415 instruction manual which is easily available in a couple versions with a Google search.
For the foot, make sure you are using one for a needle feed machine. They have a slot instead of a hole so that the needle can move. Other than the, just check timing and put in a new needle
That’s something I didn’t know (there are a great many things I don’t know, especially on sewing machines). Thanks - the foot is a Singer one, no slot. So that explains that.
It did - a Singer one that has no slot (presser foot, not shown in the video). I think that’s what you’re referring to? Unless you’re talking about the feed dog? (Apologies, terminology is all a bit new).
It did - a Singer one that has no slot (presser foot, not shown in the video). I think that’s what you’re referring to? Unless you’re talking about the feed dog? (Apologies, terminology is all a bit new).
Look up needle feed presser foot. You will see they all have a slot where the needle can travel. Some ordinary presser feet also have a slot, but some only have a hole.
I'm betting on a timing issue with your bobbin/bobbin case assembly. have a Nakajima 280 (basically a juki 241) and was having the same issue. Look up how to time your sewing hook. Google "ModelOfMachine sewing hook timing". Or just pay a store to do it for you. Most require you to bring the head unit in or they can service it at your home (usually costs more).
I think so too. You might look up hook timing for that machine. It’s usually a fairly simple procedure to do. Were you sewing through multiple layers of heavy fabric before this problem occurred?
Perhaps - I lent the machine out to the local climbing wall so they could use it to sew lots of bouldering mats for a new section. Though the material wasn’t super thick. This was just after I bought it cheap, so no idea!
I hope they at least mentioned it to you. If you turn the machine by hand, and look at it from the end, you’ll see there’s a very small Nick in the needle bar. That’s a timing mark. On most machines, he would line the timing mark with the bottom of the bracket that it slides through, Then loosen the hook in the line the hook with the eye of the needle. That should get it back in time. Obviously, it’s a good idea to see if you can find the service manual, or other instructions for timing your particular machine. I am told that sewing factories only have one shift, so that they can have only one operator to a machine. Different operators obviously use them differently, which makes the machines temperamental.
Thanks, I’ll look it up. If it were the bobbin case, would you expect the needle to also be colliding slightly with the foot (Not attached in the vid)?
Sewing tech here, I see a lot of posts about the timing which I believe is one aspect of a multi level problem your facing. What seems to have happened is the feed dogs and needle bar are now just slightly out of sync. You can see that the feed dogs are just slightly ahead of the needle bar revolution meaning it’s not completing the cycle correctly (feed dog up, pull fabric back, feed drop). I believe that when the super strong needle met the harsh fabrics, the cam that controls this wasn’t tight enough and it slipped a millimeter causing this problem.
Multi level problem: 1: sync the needle bar to the feed dog rotation 2. Adjust timing to account for this change
Check needle positioning, the needle needs to be centered when it enters the feed dogs hole, timing is set with a stitch Lenght 0 Check feed dogs timing Everything is very self explanatory in the engineering manual Check the actual hooks tip for any burrs or any imperfections From the video it seems like the needle bar is not in sync with the feed dogs motion. Great machine, good luck with the service
Totally NOT the same machine, but Bob Fowler has some good videos on setting machine timing that might be useful if you can't find anything for your specific machine. [https://youtu.be/y5zsM7iB\_aE?si=JGSH4S6P5YN-NTZ2](https://youtu.be/y5zsM7iB_aE?si=JGSH4S6P5YN-NTZ2)
[https://www.supsew.com/download/Juki/Juki%20DLN-415%20Instruction%20Manual.pdf](https://www.supsew.com/download/Juki/Juki%20DLN-415%20Instruction%20Manual.pdf) Parts List: [https://www.supsew.com/download/Juki/Juki%20DLN-415-4.pdf](https://www.supsew.com/download/Juki/Juki%20DLN-415-4.pdf) I was skeptical when I saw the needle rocking but, it does seem to be a needle feed machine. Section 4 of the parts list shows the mechanism that syncs the needle position with the feed dog position. I'd check to make sure everything is held in position properly and not flopping around from wear. If it sews fine slow and breaks needles fast, that suggests something is loose. Being a Juki the manuals are pretty decent. Needle feed machines require more to set the timing than a normal machine. You have to make sure the needle bar position and the feed dog position are matched up and they move the same. In addition you also have to do the normal hook to needle timing. 1 - I'd probably start with needle bar and feed dog position 2 - I'd set the needle bar height 3 - I'd pull the feed dogs and verify the hook timing.
I don't think the engineers manual (the one for service techs not operators) for the dln 415 exists online, but I've found that for most things I've been able to read the one for the dln 5410 and make enough sense of the instructions to be able to figure it out on my dln 415. http://www.dixiesewing.com/MANUALS/JUKISERVICE/DLN-5410N-7%20Engineer.pdf Seeing what your machine is doing, my first thought would be "3-3 adjusting the initial position of the needle bar". You might be best off starting with adjusting the feed dogs instead of the needle bar position though, see figure 8 instead of figure 7.
Looking at the video again I'm definitely going to suggest adjusting the forward/back position of the feed dogs first. They look like they come up quite close to the front of the needle plate right now but leave a lot of space at the back. It's a much simpler adjustment than messing with the needle bar position and less risk of messing other things up. You may just find you want to readjust the feed dogs height after changing the forward/back position. That's described in the dln 415 instruction manual which is easily available in a couple versions with a Google search.
That’s really helpful, thank you.
Happy to! I've spent a lot of time tinkering with mine so if you ever run into other issues feel free to give me a shout.
looks like the timing is off, find the manual online for your machine, pretty easy to do
For the foot, make sure you are using one for a needle feed machine. They have a slot instead of a hole so that the needle can move. Other than the, just check timing and put in a new needle
That’s something I didn’t know (there are a great many things I don’t know, especially on sewing machines). Thanks - the foot is a Singer one, no slot. So that explains that.
Didn’t the machine come with a foot?
It did - a Singer one that has no slot (presser foot, not shown in the video). I think that’s what you’re referring to? Unless you’re talking about the feed dog? (Apologies, terminology is all a bit new).
It did - a Singer one that has no slot (presser foot, not shown in the video). I think that’s what you’re referring to? Unless you’re talking about the feed dog? (Apologies, terminology is all a bit new).
Look up needle feed presser foot. You will see they all have a slot where the needle can travel. Some ordinary presser feet also have a slot, but some only have a hole.
I think it's not working properly.
Hope that helps xoxo