Commons:Deletion requests/File:Lockstitch.gif
The file depicts physical impossibilities AbyssopalegicIdeas (talk) 04:14, 30 August 2020 (UTC)
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. AbyssopalegicIdeas (talk) 04:14, 30 August 2020 (UTC)
- Actually, I retract the second point. I just realized, I was wrong. There are setups that can have the needle lower behind the hook; the needle can't lower behind the driver. The thread must be able to pass through a gap behind the hook (which completely detached and just sits in place) and the front of the driver.
- Having said all that, the primary point of the animation depicting the upper thread passing through the hook itself isn't physically accurate, so I'm still leaving this page up for deletion. AbyssopalegicIdeas
Keep · This is seen wrong, there are no physical impossibilities. The hook doesn't pass through a solid object. It is passing BEHIND the hook. (I know this process from praxis and my university time.)
The file is reviewed by the awarding process of picture of 2009 and used in several Projects. A 2D Animation can show the movement in the 3th dimension. If you want so see the movment arount have a loot here: Youtube: Das Geheimnis der Nähmaschine/Secret of Sewingmashin (WDR Sachgeschichte) (a model physical model showing the same) HBR (talk) 00:00, 31 August 2020 (UTC)
Why does it work in the reverence video? HBR (talk) 19:12, 2 September 2020 (UTC)
- Keep Irrelevant (and wrong) reason for deletion. Andy Dingley (talk) 22:32, 5 September 2020 (UTC)
- See also File:Error within Lockstitch Animation.png Andy Dingley (talk) 22:36, 5 September 2020 (UTC)
- Keep I have actually found this file searching for potential nominations for COM:MOTD. I fail to to see why it should be deleted. ℺ Gone Postal (〠 ✉ • ✍ ⏿) 06:28, 16 September 2020 (UTC)
Kept: No valid reason for deletion. --Podzemnik (talk) 07:51, 9 October 2020 (UTC)
