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Author Topic: Can buckling spring tension be increased by stretching the spring?  (Read 2561 times)

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Offline phototristan

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Can buckling spring tension be increased by stretching the spring?
« on: Sat, 28 August 2010, 14:05:07 »
I've always wondered, can buckling spring tension be increased by pulling on and stretching the spring? Would that work?
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Offline audioave10

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Can buckling spring tension be increased by stretching the spring?
« Reply #1 on: Sat, 28 August 2010, 14:27:07 »
I would worry about warping the spring slightly to one side. Might cause an inconsistant click. I worked with metals for many years. The spring is so small that you can't always predict how it would react.
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Offline ch_123

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Can buckling spring tension be increased by stretching the spring?
« Reply #2 on: Sat, 28 August 2010, 14:48:51 »
Im pretty sure that this has been tested out and failed miserably.

The whole thing depends on the dimensions of the spring being within certain tolerances, relative to the key travel, the size of the hammer, and how much force the hammer must strike whatever contact mechanism is underneath it. If you start playing around with it stops working.

For example, while the Model F springs are the same length, they have more coils, and consequently don't work if you put one on a Model M hammer and put one in a Model M. The opposite also doesn't work.
« Last Edit: Sat, 28 August 2010, 14:51:53 by ch_123 »
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Offline phototristan

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Can buckling spring tension be increased by stretching the spring?
« Reply #3 on: Sat, 28 August 2010, 16:18:06 »
Makes sense. Thanks guys.
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Offline Morning Song

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Can buckling spring tension be increased by stretching the spring?
« Reply #4 on: Sat, 28 August 2010, 16:29:11 »
The only way i think people have succeeded in tweaking the feel of a BS keyboard has been through boltmodding, which as i understand, dampens some of the noise and 'tightens' the feel. i'm not sure if it's possible to do the reverse.
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Offline Findecanor

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Can buckling spring tension be increased by stretching the spring?
« Reply #5 on: Sat, 28 August 2010, 16:31:41 »
The way to increase the tension of a spring is to compress it fully, and that is usually done as a step during manufacturing.
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Offline ch_123

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Can buckling spring tension be increased by stretching the spring?
« Reply #6 on: Sat, 28 August 2010, 16:45:46 »
Ah, the Model F's spring is like 1mm longer than the M's one.
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Offline wellington1869

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Can buckling spring tension be increased by stretching the spring?
« Reply #7 on: Sat, 28 August 2010, 18:18:11 »
Quote from: phototristan;217652
I've always wondered, can buckling spring tension be increased by pulling on and stretching the spring? Would that work?


conversely, making it softer by squishing spring?
I dont think anyone has done squish/stretch tests, have they? any volunteers so we have a definitive experiment for that?
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Offline phototristan

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Can buckling spring tension be increased by stretching the spring?
« Reply #8 on: Sat, 28 August 2010, 18:58:30 »
Quote from: Morning Song;217681
The only way i think people have succeeded in tweaking the feel of a BS keyboard has been through boltmodding, which as i understand, dampens some of the noise and 'tightens' the feel. i'm not sure if it's possible to do the reverse.


How does bolt modding change the feel? I'm not clear on how that would change the feel nor even dampen the noise.
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Offline JBert

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Can buckling spring tension be increased by stretching the spring?
« Reply #9 on: Sun, 29 August 2010, 05:16:00 »
Quote from: phototristan;217724
How does bolt modding change the feel? I'm not clear on how that would change the feel nor even dampen the noise.
The rivets which clamp front and back plate together may break after a while, which means that the springs will force the plates apart. As a result, a spring will buckle differently because it has more distance between the plates.
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Offline TheSoundofTyping

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Can buckling spring tension be increased by stretching the spring?
« Reply #10 on: Sun, 29 August 2010, 05:41:05 »
No OP, taking a spring after it has finished being made and then stretching it only weakens the spring.  It's the opposite of what you want.
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