3 ms·
My guess for why there isn't a wire all the way through is that they already have a machine that attaches wires to the ends of resistors and they don't want to
by OnlyOneCannolo 6y ago
My guess for why there isn't a wire all the way through is that they already have a machine that attaches wires to the ends of resistors and they don't want to bother with another machine.
- exmadscientist 6y agoTwo reasons it has to be like this, both of the "they already have a machine" sort: 1. The way ordinary through-hole film resistors are made is to deposit a carbon or metal film on the substrate, then trim it in a spiral pattern to set the resistance. To make a zero-ohm resistor, then, all they do is... not trim the film. Skipping a step is very easy for them to do! 2. The components must have identical body shapes to ordinary through-hole resistors, or the automated placement equipment can't handle them. It is possible to use wire jumpers as well, but that's a different machine. (Which absolutely exists and is used, it's just only found in assembly shops big enough to buy them.)