Adler thread take-up arm question.

[Icho]

Hello everyone. Is there a way to adjust the timing of the take-up leaver on an Adler 269-373? I'm sure there must be but I can't see it and I don't see anything in the service manual. It definitely seems like there is a problem with mine because when the thread is looping around the bobbin shuttle, the leaver is pulling, causing the thread to "pop" as it comes around the shuttle. It has actually caused the thread to occasionally break. From what I found so far is that the take-up leaver should be at the top when the needle bar is at its highest point. That is not the case on my machine.

[Constabulary]

I would guess this rather is a hook timing problem but hard to tell from the distance.

[Icho]

  On 2/6/2023 at 6:58 AM, Constabulary said:

I would guess this rather is a hook timing problem but hard to tell from the distance.

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The hook is where it should be on the needle and it sews without skipping. The take-up leaver just seems to be pulling way too soon to the point that I can see the slides, rods and bushings in the head stressing to get the thread past the bobbin shuttle. I'd bet the thread would break every time if I used smaller or weaker thread. 

The take-up arm doesn't reach the top until the needle bar is well into the down position. 

[CowboyBob]

  On 2/6/2023 at 10:50 AM, Icho said:

The hook is where it should be on the needle and it sews without skipping. The take-up leaver just seems to be pulling way too soon to the point that I can see the slides, rods and bushings in the head stressing to get the thread past the bobbin shuttle. I'd bet the thread would break every time if I used smaller or weaker thread. 

The take-up arm doesn't reach the top until the needle bar is well into the down position. 

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Have you tried adjusting the bobbincase opening finger? 

[Constabulary]

just came to my mind - maybe the safety clutch has tripped or one of the timing belt pulleys is loose / loose set screws or the timing belt is a few teeth off.

[Icho]

  On 2/6/2023 at 11:48 AM, CowboyBob said:

Have you tried adjusting the bobbincase opening finger? 

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Yes. That was my first thought when I was setting up and tuning. I tried the settings from one extreme to the other and everything in between so I thought it was just the way it is. The other day I just realized that there is definitely something up with the take-up lever. The popping is happening just as it gets pulled to the farthest point and makes it over the right side of the shuttle. The take-up arm is already pulling it tight. I hope I'm explaining it clearly and correctly. 

[Icho]

  On 2/6/2023 at 12:29 PM, Constabulary said:

just came to my mind - maybe the safety clutch has tripped or one of the timing belt pulleys is loose / loose set screws or the timing belt is a few teeth off.

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This is actually causing the safety clutch to trip. I did slightly tighten up the safety clutch last night. In the past I had to take it apart because it was dirty and stuck. Now it works properly and I started out "softer" on it knowing I would have to create up on it until it is tight enough. The timing pulleys are definitely not slipping. 

[CowboyBob]

  On 2/6/2023 at 12:30 PM, Icho said:

Yes. That was my first thought when I was setting up and tuning. I tried the settings from one extreme to the other and everything in between so I thought it was just the way it is. The other day I just realized that there is definitely something up with the take-up lever. The popping is happening just as it gets pulled to the farthest point and makes it over the right side of the shuttle. The take-up arm is already pulling it tight. I hope I'm explaining it clearly and correctly. 

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There is no takeup lever adjustment,but here is a set screw in the needlebar cam that could be loose,otherwise maybe your hook timing is slow causing the thread to not release off of the hook when it should.You want the opener to just open alittle & not be tight when it's pulling all the way counter-clockwise.

[Icho]

  On 2/6/2023 at 2:15 PM, CowboyBob said:

There is no takeup lever adjustment,but here is a set screw in the needlebar cam that could be loose,otherwise maybe your hook timing is slow causing the thread to not release off of the hook when it should.You want the opener to just open alittle & not be tight when it's pulling all the way counter-clockwise.

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Those screws were tight but I did tried to loosen those screws to see if I can correct it that way but the only thing that did is change the needle height. I figured that was the only thing it would do but I tried anyway just in case there was some other geometry in there I wasn't seeing. I left it at that and figured I'd ask around in case I was missing anything else. I will adjust it back tonight and maybe take some videos of what is going on. I'm usually pretty good at figuring out how mechanical things work but this is messing with me. 

[CowboyBob]

  On 2/6/2023 at 2:25 PM, Icho said:

Those screws were tight but I did tried to loosen those screws to see if I can correct it that way but the only thing that did is change the needle height. I figured that was the only thing it would do but I tried anyway just in case there was some other geometry in there I wasn't seeing. I left it at that and figured I'd ask around in case I was missing anything else. I will adjust it back tonight and maybe take some videos of what is going on. I'm usually pretty good at figuring out how mechanical things work but this is messing with me. 

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This isn't an Adler but I pointed out the needlebar cam for you,should have 2-screws.

needlebar cam.pdfFetching info...