File talk:Lockstitch.gif

  Cool animation!

Interesting, but it would benefit from more frames of animation and perhaps also a slower speed. I cannot really figure out what is going on.--SkiDragon (talk) 01:48, 18 August 2009 (UTC)

There is a slow version. --AM (talk) 07:39, 18 August 2009 (UTC)

Spanish Description

Please, add in the page description:

{{ImageNote|id=1|x=323|y=38|w=14|h=326|dimx=419|dimy=500|style=2}} {{es|Aguja}} {{ImageNoteEnd|id=1}}

--Wilfredo Rodríguez (talk) 17:51, 18 August 2009 (UTC)

Improved Version

As a former sewing machine mechanic, I immediately spotted what I think is a glaring flaw in the existing animation. One of the most important principles of the lock-stitch process is that a loop is formed in the thread as the needle rises, before the shuttle's hook arrives at the needle, not at bottom dead center (BCD) as the current animation indicates.

I have taken it upon myself to edit the animation to represent this principle and feel it would be a good idea to replace the existing gif file with my edited version. My version also fixes a mistake in the existing animation, wherein the first and last frames are identical, causing an apparent pause in the shuttle's rotation.

I've only posted my version to a free picture hosting site for the time being, and would appreciate advice on how (or whether) to proceed from here.

Antagony1960 (talk) 16:20, 22 May 2010 (UTC)

Error in animation

This animation as is cannot be right. The yellow thread passes on both sides of the spool in a way to make it impossible for the spool to stay in place.

Also, when I look at my own sewing machine, the rotating thingy does not rotate: it goes back-and-forth. --82.156.30.17 20:14, 24 March 2016 (UTC)

You can see the movemt of the spool in this video: (4:38min) Youtube: Das Geheimnis der Nähmaschine/Secret of Sewingmashin (WDR Sachgeschichte) (a model physical model showing the same) HBR (留言) 19:10, 2 September 2020 (UTC)

Request for deletion due to inaccuracies and physical impossibilities

The animation has flaws that are not the product of abstraction for coherence, but physical impossibilities.

First off, the animation depicts the upper thread passing through a solid object (the hook). If you look at the upper thread being pulled behind the bobbin, at first it is behind the hook, but then suddenly appears in front of the hook. If anyone has any doubts of this, save the file and compare frames 3 and 10.

Secondly, the needle is depicted lowering behind the hook in the animation, that wouldn't work. The needle has to lower in front of the hook because the hook holds one part of the upper thread (the part coming from the needle) behind the bobbin, while it also brings the other part (the part leading up to the previous stitch) is pulled in front of the bobbin, around the lower thread.

I think this file should be nominated for deletion. I think it would be better not to have a file at all than to have one that gives incorrect information. At least until someone makes a correct animation.