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For you machinists out there

Very nice! I wish they had shown the cuts at full speed or mentioned the feedrate. In the best of all perfect worlds when machining, you want the chips to curl around and break. The chips carry the heat away from the tool, prolonging the edge of the cutting tool, and its useful life. If the tool moves slow, the material passes over the tool and becomes a ribbon. The heat is pushed into the tool and the ribbon becomes a dangerous appendage to deal with.
 
interesting, chips are easier to deal with hence most modern tools have chip breaker grooves for a decent depth of cut, but we've all made razor sharp birds nests. nice to see the build up on the tip and it breaking away to affect the cut surface.
 
Yes, typically you want the material to break into chips that look like the number 9. Soft material is hard to force to make a chip. If harder material is making a ribbon, you increase the feedrate to make it take a bigger bite, which usually forces it to make chips.
 
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