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Happ to stop using Cherry switches
MonMotha:
--- Quote from: AndyWarne on July 04, 2009, 04:55:25 pm ---I personally like Sanwa switches the best of all. The reason for this might be somewhat too objective though, I admit. Its because the output looks best on an oscilloscope, very little contact bounce and a nice clean make/break. A better signal then any Cherry switch. I accept that they are a heavier action than the Cherry switches though, and my criteria might not be the best way to subjectively judge a switch.
--- End quote ---
The high actuation force (much too high for a gaming button application, in my opinion - I'm used to 75-150g, while those seemed like at least 250g) was the least of the problems my friend saw with his. Within a week or two, two out of the 10 switches had failed. They'd "stick" - that is, they'd hold for a period of time after you released them, often making and breaking contact rapidly during that "sticking" time. It's not hard to debounce a switch (though one could argue all day as to preferred methods of doing it), but it's basically impossible to deal with behavior like that.
Ummon:
--- Quote from: AndyWarne on July 04, 2009, 04:55:25 pm ---I personally like Sanwa switches the best of all. The reason for this might be somewhat too objective though, I admit. Its because the output looks best on an oscilloscope, very little contact bounce and a nice clean make/break. A better signal then any Cherry switch.
--- End quote ---
Nice.
RandyT:
--- Quote from: AndyWarne on July 04, 2009, 04:55:25 pm ---Microswitches used in gaming applications can and do experience contact problems and sometimes this can happen quite early in the lifetime of the switch.
The problem is lack of contact "wetting" which is an issue when contacts are used with very low currents. Tarnishing of the contacts will occur if the contacts have a wetting current which is above the current being switched.
...
We dont yet know if the E-Switches will suffer from any problems or not. They may well be fine. The point is though that the fact these are switching a low current does not mean the lifetime of the switch will be longer than any manufacturers stated life. It might well be much shorter.
--- End quote ---
This is just a long way of saying "the contacts might tarnish". Of course, the only contacts which will never tarnish are those made from gold, which most, including the Cherrys, are not.
This "concern" is also failing to take into consideration two things;
1) Tarnishing of contacts is of most concern where humidity is very high and the contacts are exposed to surrounding air. Due to the enclosed nature of the typical microswitch, there would be very little chance of this being a problem, unless you happen to live in a jungle.
2) One of the benefits of "snap" switches over conventional leaf type switches is the mechanical action that provides a consistent interaction between the contacts. This interaction is literally the slamming together of two pieces of metal under spring tension. As tarnish, especially as it first forms, is very, very thin, this slamming action serves to break through it to reestablish the contact surface every time it is actuated.
It should probably also be mentioned that the harder and more solidly the contacts slam together, the less "bounce" will be detected on a scope. But this usually equates to a harder actuation, which is detrimental to the feel of the switch, and possibly performance when being used in this application (gaming.)
There seems to be little point in bringing up theory of switch contact design and dynamics that don't apply significantly to the types of switches currently being discussed.
RandyT
kowal:
Omron=trash? very interesting:PPPP
now Omron make best durability micro
V series have 50.000.000
I think it is best micro on world fell is very good, same clik, good plunger reflection, nice realization. comparable quality have only MicroYamatace
but Omron V have 200g force to engage it is switch only for joystick
for buttons max is 100g, over>100 sux:P
on buttons I use only Chery (KWJ or D42) other good thing is SAIA X3 (something 90g) or Freeport witch grey-white plunger (something 85g), but I still will Cherry.
RandyT:
--- Quote from: kowal on July 06, 2009, 12:54:22 pm ---Omron=trash? very interesting:PPPP
now Omron make best durability micro
V series have 50.000.000
I think it is best micro on world fell is very good, same clik, good plunger reflection, nice realization. comparable quality have only MicroYamatace
but Omron V have 200g force to engage it is switch only for joystick
for buttons max is 100g, over>100 sux:P
on buttons I use only Chery (KWJ or D42) other good thing is SAIA X3 (something 90g) or Freeport witch grey-white plunger (something 85g), but I still will Cherry.
--- End quote ---
MonMotha didn't say Omron were "trash." Your translator app doesn't understand slang.
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