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<div class="moz-cite-prefix">Am 22.01.2016 um 00:09 schrieb
cheater00 .:<br>
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<blockquote
cite="mid:CA+9GZUhA3UDaa+Ohkh8sFaHjeZ-coJ5A+mkDKO1-U6Eue5bZCQ@mail.gmail.com"
type="cite">
<pre wrap="">Reading up on the new Nord Piano 3, I was wondering if anyone ever
tried to emulate the feel of a piano keyboard - how the resistance of
a key changes depending on the state of the hammer mechanism, by using
electromagnets
</pre>
</blockquote>
I remember the Frankfurt Musikmesse in 1992 or '93; there was a
manufacturer of organ keyboards (the real ones with the pipes
behind...), who had built a prototype for a piano action keyboard,
which worked only with magnets. <br>
Under the key there was a kind of keel, which had a magnet (m) on
it (see ASCII-sketch below). On the bottom of the housing was
another magnet (M), which simulated the weight of the key by its
repulsion. But that could be done with springs too - so he
positioned two additional magnets (x) aside and a little lower than
the keel. It requires a certain initial pressure to overcome the
force of these magnets - which is typical for a real piano, but is
lacking on all electric pianos that I know. This was the best
electrical keyboard I have ever played.<br>
<font face="Courier New, Courier, monospace"> ___<br>
|key|<br>
|___|<br>
|<br>
|<br>
m<br>
x x<br>
<br>
__M__<br>
</font><br>
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