Tuesday, March 25, 2008

How it works

The guys at the liquor store are always asking ...


How the heck does a sewing machine stitch?

6 comments:

Anonymous said...

There's a little tiny man under the plate. Same with a refrigerator icemaker. Little tiny man, but he has an icepick instead of a needle. Be careful in there.
Lt. Col. Gen. Tailgunner dick

Anonymous said...

Roger, I use an industrial saddle stitching machine to build my holsters. That is a great graphic, but I got to go with the "Little man" theory: a pissed off little man, who has a terrible sense of timing always runs me out of bobbin on a long straight course, when I don't want a double thread, or right after I start a complicated seam.
RAK

Desert Cat said...

I thought for a second it made sense, but it still doesn't. That shuttle (the red thing) is floating in mid-air. It has to be because as you may observe, thread passes on either side of it--the bobbin thread passes all the way along the front face of it, and the top thread passes all the way along the back face of it as well as the front face. The top thread also passes across both faces of the bobbin itself.

In an actual sewing machine it can't actually do that--stuff doesn't hover in mid-air to allow thread to pass around both sides while it spins.

I still don't know how a sewing machine stitches.

B....... said...

Desert Cat - Magnetically suspended - Similar to how cold fusion works.

Anonymous said...

the red line indicates the edge of a cup shaped shuttle carrier that is attached to a an axle.

Desert Cat said...

And so the string passes *through* this cup shaped carrier or its attached axle?

One of these days I'ma gonna tear apart a sewing machine to find out...

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