Post by groink_hi
I didn't realize springs is a complete science. LOL!!!!
Anyway, the original spring that comes with the keyboard is 1.0mm thick,
10mm diameter, and 20mm long. This would be 1*10*20 in spring lingo. The
tension of the spring appears to be somewhat weak, as it has around two
to two 1/2 windings. The more windings, the more tension therefore the
harder it is to push the RESET button down.
The stem on the switch is also in play. The length from the base of the
switch to where the key cap sits is 13mm. So, this 20mm spring is
compressed almost in half while it sits there. Then, when you press the
key cap, the stem shrink down to 7mm. That means the spring pushes down 6mm.
So, while Googling around, I can't find the exact spring. But, I've found
springs that come pretty close. One spring is 1*10*20, but it has four
windings - double that of the original spring. There's also a 1*10*15,
which is shorter but it has three windings.
I'm wondering if getting the 1*10*15 is the better one? Although it has
slightly more windings than the original spring, being 5mm shorter, along
with the existing stem and key cap, it may come close to the tension of
the original spring.
a wonderful thing. ;-)