Adler 269-373 back stitche length.

[Icho]

Just wondering if anyone would happen to know how th adjust the reverse stitch length so that it matches the forward stitch length on an Adler 269-373. I've been searching and only found answers for other machines. I did see an old post from years ago about this but there was no solution  so instead of restarting an old post I figured I'd start a fresh one. 

[Uwe]

The Adler 269 Service Manual describes how to adjust the feed motion eccentric on page 6. This is where you can adjust forward/reverse feed balance. On this machine, when the needle is at the lowest position (NOT the hook timing position) the needle is not supposed to move when you flip the reverse lever up/down. If the needle moves, then your feed eccentric is not properly centered.

 

The relevant page in English is here:

 

https://www.manualslib.com/manual/461721/Duerkopp-Adler-269.html?page=6#manual

 

You will also need to adjust vertical feed timing after you change horizontal feed timing.

 

Edited November 26, 2022 by Uwe

[Icho]

I'm not sure if I am checking it correctly but I turned the wheel until it is all the way down. When I lift the lever into reverse the needle and feed dog move back what looks to be the stitch length. 

[Icho]

1 hour ago, Uwe said:

The Adler 269 Service Manual describes how to adjust the feed motion eccentric on page 6. This is where you can adjust forward/reverse feed balance. On this machine, when the needle is at the lowest position (NOT the hook timing position) the needle is not supposed to move when you flip the reverse lever up/down. If the needle moves, then your feed eccentric is not properly centered.

 

The relevant page in English is here:

 

https://www.manualslib.com/manual/461721/Duerkopp-Adler-269.html?page=6#manual

 

You will also need to adjust vertical feed timing after you change horizontal feed timing.

 

I'm not sure if I am checking it correctly but I turned the wheel until it is all the way down. When I lift the lever into reverse the needle and feed dog move back what looks to be the stitch length. So if I am checking and understanding it correctly it definitely needs to be adjusted. 

[Icho]

I did end up coming across a video for a pfaff that is the same idea. In the video for that particular machine he had to set the needle bar up 4mm and make sure the feed dog isn't moving. I know it is a different machine with different specs and I have to go with the service manual for my machine but I figured I'd just check. At 4mm up the feed dogs and needle bar did not move. Tomorrow I will bring it into spec according to the adler 269-373 service manual. I do already have all of the manuals printed out and organized in a binder. I did that the evening I brought the machine home. 

The other thing I in the video was what looks to be called the pressure piece. I noticed mine is broken on 1 side. See pic. I will look into getting a new one but if it ends up being a pain I may end up making one out of aluminum. 

 

Thank you for the help so far. 

[Eitan]

Hi,

I also have the same issue.

Did you manage to solve it?

[Icho]

Not yet. I'm waiting for parts. That will be a couple weeks...hopefully less. I will update when I get it back together and try it out. 

Edited December 12, 2022 by Icho

[Uwe]

By the way, Adler uses adjustable end stops to allow you to dial in perfectly matching forward and reverse stitch length - for one specific stitch length you choose. This feature is designed for manufacturing settings where you use the same stitch length for long periods of time.

Place the stitch length lever in the forward position for the desired stitch length. Loosen the end stop screw and move the end stop to touch the lever. Lock this end stop position by tightening the screw again.

Then move the lever to match the reverse stitch length - turn the handwheel by hand until the tip of the needle is very close to the previous stitch hole. Fine-tune the lever position until the needle perfectly aligns with the previous stitch hole. Move the corresponding end stop to touch the lever in this position and lock it in.

Now you can merrily flip the lever all the way up and down to either end stop and get perfectly matching forward and reverse stitches for this particular stitch length.

Repeat every time you change stitch length. It takes less than a minute with a little practice.

Also, make sure these end stops are adjusted all the way out to achieve maximum stitch length.

 

 

[Michiel]

On 12/12/2022 at 6:07 AM, Uwe said:

 

 

 

That is an interesting part (the adjustable stop)

i have never seen this one before

does someone have (or can make) better pictures of it so i can see the complete design?

regards michiel

[Icho]

On 12/12/2022 at 12:07 AM, Uwe said:

By the way, Adler uses adjustable end stops to allow you to dial in perfectly matching forward and reverse stitch length - for one specific stitch length you choose. This feature is designed for manufacturing settings where you use the same stitch length for long periods of time.

Place the stitch length lever in the forward position for the desired stitch length. Loosen the end stop screw and move the end stop to touch the lever. Lock this end stop position by tightening the screw again.

Then move the lever to match the reverse stitch length - turn the handwheel by hand until the tip of the needle is very close to the previous stitch hole. Fine-tune the lever position until the needle perfectly aligns with the previous stitch hole. Move the corresponding end stop to touch the lever in this position and lock it in.

Now you can merrily flip the lever all the way up and down to either end stop and get perfectly matching forward and reverse stitches for this particular stitch length.

Repeat every time you change stitch length. It takes less than a minute with a little practice.

Also, make sure these end stops are adjusted all the way out to achieve maximum stitch length.

 

 

So is there supposed to be a second stop like the one in the picture on the top? I don't see any stops for the reverse other than the broken plastic piece. I do have a new one coming so I hope that will solve the problem.