Loose loop at pick up bar

[Frodo]

Shouldn’t this thread loop be taunt ?

if so, how do I adjust it?

[Frodo]

Mod, video did not upload correctly

please delete it from this thread to avoid confusion 

[Wizcrafts]

Is that a Singer 29? What sub-model is it? Your video doesn't show enough of the top of the take-up rack to ID it.

Early models only have a flat spring on top to pull the take-up check lever back to keep the thread taut. A tight spring keeps the thread taut for most projects. If the top spring, no matter its style, is loose, the check lever tends to drop down too soon and stay down, thus leaving the top thread looser than it should be. So, try tightening that top spring.

Later models also have a barrel shaped adjuster to force more slack when sewing thick jobs. When it is fully backed out it has no affect. As you screw it in the check lever is forced to stay up. This adds slack thread on top. That may help maintain the stitch length in thick leather by reducing the back pressure that tight thread causes.

[Quade]

I was able to watch the video so it seems like you got it right. 

[Frodo]

EC 974118 is on the brass plate directly below the 29k62 brass plate

picture of the top adjustment

[Frodo]

EC 974118 is on the brass plate directly below the 29k62 brass plate

picture of the top adjustment

 

 

below are 2 pictures, one at the top of rotation. The other at the bottom of rotation 

[Constabulary]

Normal - nothing unusual. You have thread slack on all sewing machines (as far as I know) when the needle bar is in the lower position before it rises and is forming the thread loop. However - thread slack can cause problems on the Singer 29K or Adler 30 when the paddle spring on the needle bar is worn / has a worn in grove (caused by thread and / or the threading wire).

Edited December 27, 2022 by Constabulary

[Wizcrafts]

Frodo, do this test. With the machine threaded with your usual size thread, gently pull up from the top and down under the foot on the top thread. Is there any tension on the thread, or is it totally loose? It should have some tension holding onto the thread.

If the thread is very easy to pull through the snout, lower the needle bar all the way to expose the bottom of the paddle spring, which is immediately over the needle mounting bracket. Take a small screwdriver and gently push against the paddle and see if it grabs the thread tighter. If so, it may be that some thread fragments are caught between the spring and needle bar thread channel. Running the thread down should clear it. Compressed air may help if shot down through the top of the thread channel.

If the spring appears to be bent, or cracked, it must be replaced. This is requires punching out the tapered stud on top at the needle bar/take-up lever junction. It pushes out from front to back. Then you remove the presser foot and screw, then pull the needle bar out from the top. The paddle spring is secured by two tiny screws. One or both of them may have been filed down on the leading edge so it clears the bushing as the foot is turned in any direction. Carefully remove them and keep them separated left and right so you can reinstall them in the same positions. Clean out any debris in the thread channel. Get a new paddle spring and fasten it down all the way, minding the position of the screws.

NB: If you have to replace the screws they may need to be filed a bit on the edges that protrude of of round and might touch the revolving bushing.

The paddle spring is responsible for holding the top thread taut as the hook comes around to pick off the loop. If that spring is twisted, cracked, gouged or too loose, the loop will dissolve before the hook can pick it off. Sometimes, users will deal with this situation by loosening the top spring that pulls the check lever up, so it drops down easily. Then they compensate for a lack of thread control by tightening the barrel adjuster to force the lever up. I've done this a few times on patchers until I obtained a new spring and found time to install it.

[Frodo]

Do not laugh but.. is the needle bar missing?

doesn’t it go in that slot?

[Frodo]

Do not laugh but.. is the needle bar missing?

doesn’t it go in that slot?