MezzoDelCammin
Joined 5 years ago
Joined 5 years ago
2024, 253 comments: https://news.ycombinator.com/item?id=40103590
2022, 271 comments: https://news.ycombinator.com/item?id=32035054
2020, 298 comments: https://news.ycombinator.com/item?id=25136422
Bosch used to do the first magnetos / dynamos in the early 1900s motorbikes / cars. The principle is similar to this day - one rotating magnetic field within one static. You can do all kinds of shenanigans and combinations of permanent magnets / coils where it's either the electric current generating a magnetic field or the magnetic field generating an electric current. Depending whether You want the movement to generate electricity or the electricity to generate movement.
In the first magnetos (the thing that uses the engine rotation in order to generate a current that then makes a spark in the spark plug) they used permanently magnetized exterior plating and a rotating winding. That's sort of what You see in the logo - two coil windings rotating in their housing.
I see the point of it being a potential e-waste in 10 years, but I'm not sure the mechanical route was much better in that respect (looking at you, shimano shifter-derailleur-brake compatibility table that currently runs a few pages long even before adding all the Di2 stuff)
BTW - "what" do You need a 48-spoke hub for? Are You building cargo bikes in Your spare time? I'm not trying to be snarky - the "all our bikes load limit is 120kg bicycle included" has long been bothering me as well (100kg rider), so... kinda curious about Your side projects
There's plenty of hacking that can be done on the subject of sewing and I admit that laser cutter is a cool one.
I'm still pretty partial to that sewing machine route (or needle and thread, if handiwork is prefferable). Simply because it lets you quickly iterate and build the taste, preferences and heuristic of how to get there. Personally, I still can't read a pattern propetly. But I'm more than happy to put a few pins into a shirt and prototype in front of a mirror.
Also, it gives me a good estimate of what I'm OK doing myself and what I will outsource to an actual tailor because it's either beyond my level, or I simply don't have time to do it.
For some basic jerseys (think T-shirts) a basic zigzag is fine to begin with. That 100EUR sewing machine will have some fancier stretch stitch options that are slow, but "good enough" to look like an overlock (but can't do the cut of course).
If you have the space / money, overlock is definitely what I'd get as a second / third machine. It's much quicker / cleaner if you're working on jerseys or shirts.
But I still keep wearing the T-shirts I did when I was starting. On my list the first thing to do is to understand how to alter something to fit you. It can be done by hand (needle and thread), but to be reasonably efficient, the BOM would be "sewing machine, box of pins, scissors, piece of chalk / ruler and something to press / iron".