Re:Macbook charger teardown: surprising complexity inside Ap...
by ars on Wednesday November 25, 2015 @09:46PM
(#10630992)
> The simple fact is that there is no way to make a wire that gets twisted and yanked and bent at a 90-degree angle, and which will nevertheless last forever.
If you can, count how many strands are inside that wire. If it's fewer than 90 strands you know why this wire fails.
I bet it's probably only 19 which is the minimum for a moving wire not to break.
> That's just not a thing we can do.
Yes it is. Assembly robots that move all day can have even 5,000 strands in the wires in a careful helical winding pattern that prevents the strands from being under tension - those will not break even after constant movement and folding.
If you can, count how many strands are inside that wire. If it's fewer than 90 strands you know why this wire fails.
I bet it's probably only 19 which is the minimum for a moving wire not to break.
> That's just not a thing we can do.
Yes it is. Assembly robots that move all day can have even 5,000 strands in the wires in a careful helical winding pattern that prevents the strands from being under tension - those will not break even after constant movement and folding.