Matias Quiet Pro duplicate key presses

[dapayne12]

Hi,

I love noisey mechanical keyboards with great tactile feedback. Unfortunately, I work in an office surrounded by other people, most of whom do not have the same appreciation for great keyboards. Out of respect I do not use my buckling springs, or Cherry MX blue keyboards in the office. That's why I ordered the Matias Quiet Pro keyboard.

I have been using this keyboard since Monday. The tactile feedback for this keyboard is good, and it’s definitely quiet enough for the office space I work in. But I’m having problems with the keys labeled L and D. I use the Dvorak keyboard layout, so they actually map to E and N on my system. The problem is, key presses for these two keys are sometimes registered twice, like this:

This is ann examplee.

Sometimes the second registration of the keypress appears following the next letter, like this:

teset

I don’t have this problem with other letters on this keyboard. I also don’t have this problem with any of my other keyboards, so I don’t think iti’s caused by my typing.

I mentioned this to the company I have ordered the keyboard from, and they have offered me to return the keyboard. I’m just wondering if anyone else has had similar issues with the Matias Quiet Pro key switches. I thought it’s odd that this problem would appear on more than one key. Should I get a replacement, or just get a refund?

Thanks,

David

[ImbaHue]

Hi there,

Welcome to DT.

I also had the same kind of issue you are experiencing though mine is a clicky switch.

What I did was I used it for a couple of weeks and bam, it disappeared just like that.

It's probably the individual switch chattering.

Get a replacement and see if it works, if not just get a refund. IDK.

Kind Regards,
-ImbaHue

[jacobolus]

This is called switch "chatter" or "bounce". Basically, the electrical contact is not happening "cleanly", so when you press a key the circuit is read as closed and then open and then closed again in quick succession. This happens to some extent with every keyswitch with a direct electrical contact.

Usually the chatter can be detected and ignored by the keyboard's "debounce" routine. Basically, the keyboard records the state of each key repeatedly, and then if the key goes off and back on again in too short a time window, the keyboard knows that the second one was due to the contact bounce rather than a deliberate second keypress.

If the electrical contact part of a switch gets corroded, or dirty, or is misaligned, etc., the bouncing can get much worse, beyond the ability of the simple debounce routine to handle. You can try to clean dust off by taking the top switch housing off, blowing out the inside with compressed air, and then putting the switch back together.

Alternately, Matias customer support is pretty friendly, and they’re typically willing to replace keyboards having this type of problem.