Do you like this presser foot?

[Gymnast]

1 hour ago, trash treasure said:

This is actually pretty interesting - If the modification results in that much less tension needed, then there might be a real benefit with pucker reduction for seaming some fabrics - I may have to do some experiments on my own ...........

Thanks trash. If you try it out, I should love to know your results. I have got a supprice myselves. It is hard to believe that such a simple thing is not in use already.

[Gymnast]

Thanks Wiz - yes please. Could I do this in some other way?

[Wizcrafts]

34 minutes ago, Gymnast said:

Thanks Wiz - yes please. Could I do this in some other way?

You only have a short time to edit a post as a standard user. Moderators can act at any time.

[Gymnast]

The first test got some rightfull critique due to the different foots used in test. Now I got 3 equal foots shown from start in picture below.

All the these "vintage" foots are delivered from same supplier in same order and post. They are all hinged feet, so they can tilt a Little to the front and behind like the very first normal foot shown in picure in first post of this thread. The left one is as received. It has a rather sharp edge below and to the back, and it is bad design/manufacturing and not normal for this kind of foot. So the foot in the middle has been grinded at that point, so it is considered normal. The foot to the right do also have a notch as described in previously in this thread. The notch make space for thread, so it is easier for the machine to pull the thread for the lock in the stich.

Again two layers of vinyl is used for the test and a Serafil 20 thread. So the foot in the middle of the photo and the foot to the right are compared using two kinds sizes of needles:

I think the previous test might have been done with a 130/21 needle. This can explain the difference in thread tension to the previous test from 4.4 N to 3.8 N. With this marginal pressure on the foot, you can see a little tilt in the foot, when the needle is pulled up. This can of cause not happen with the foot with no hinge in the first post.

Still the foot with the notch seems to require less thread tension and less pressure on presser foot.

Edited June 2, 2019 by Gymnast

[DavidMillsSaddlery]

On 4/27/2019 at 4:25 AM, Gymnast said:

he may very well be a scientist with that equipment... but these needles look like they’re in backwards, and the thread isn’t run properly either...

 

 

 

[Gymnast]

On ‎6‎/‎3‎/‎2019 at 6:27 AM, turbotexas said:

he may very well be a scientist with that equipment... but these needles look like they’re in backwards, and the thread isn’t run properly either...

Oh, thats a special announcement about my credibility. I did not expect that in this forum, but it is after all the internet of today.

I am suppriced to learn, that someone used to sewing can think, that sewing like that can be done with an inverted needle.

Sometimes the good thing about internet is, that some matters can be easily verified by people who want to do that. There is over 50 videoes on youtube that show details on how Singer 201 make stitches, the direction of the grove of the needle, and how the thread will pass the machine. Make your own judgement on who is creditble. This is one of the videos:

I am sorry, if some of you will feel uncomfortable with me showing some test results. I actually just write down what I see, measure and what I think about it. Use it and think what you like and make your comments. I do know, that many here have a lot more expirience with sewing than I have.

[dikman]

You're quite right of course, gymnast, if the needle was in backwards there's no way you would get any stitches! As for the thread path, the only thing I can see that's not quite right is the angle of the thread coming down from the needle clamp, it looks like the wire guide is missing? In reality, however, it won't make much difference as at least one of my machines is missing the guide but it works fine.

Your testing methodology is impressive, it's just not something that many of us worry about, we tend to "wing it" and just learn about tension by experience. I don't think we've seen anyone delve into tensions in such a detailed manner before.

[kgg]

On 6/3/2019 at 4:27 AM, turbotexas said:

he may very well be a scientist with that equipment... but these needles look like they’re in backwards, and the thread isn’t run properly either... 

I think the problem with the above statement is that turbotexas is not familiar with older domestic Singers which have the needles installed with the long grove on the right hand side versus commercial machines having the needle installed  with the long groove installed on the left. The thread always follows the long groove so the threading of the needle on the older domestic Singers is done from right to left which the video shows correctly. I find this topic interesting on how a different / modified foot can affect the thread tension. This may not be a problem on commercial sewing machines but we all should be aware of this when we change out the presser foot on any machine particularly if a problem crops up after the change out. I think your methodology is spot on: problem, base line data, modification, test, document result, result comparison and let the chips fall wherever. The data won't lie.  

kgg

[JJN]

I think people that are not familiar with the 201k might assume by the appearance that this is a horizontal axis hook that is located on the right side of the needle. That is why it looks like the needle is in backwards to some of us. This machine is a vertical axis hook and it is located on the left side of the needle.

From the photo it looks like the needle may be slightly off with the scarf aiming  a little to the rear, but it might just be the way the photo looks.

[Wizcrafts]

If I recall correctly, the Singer 15-91 also threads from right to left (groove on right). However, it is a horizontal hook machine using Class 15 bobbins.

Singer slant needle machines thread from front to back with a vertical hook in front of the needle.