Keyslips making keys stick

Richard Brekne ricb at pianostemmer.no
Sun Jun 22 12:27:51 MDT 2008


Hi folks...

Going back to the original post its perhaps a good idea to remember that 
there are basically two causes for keys sticking on the key slip. Either 
the slip is slanted inwards a bit, in which case a bit of shimming on 
the distal edge of the underside of the slip will do the trick, or its 
warped, in which case the shimming may or may not be enough to do the job.

In the case of the warped keyslip that does not respond well enough to 
shimming, about the only good way of fixing the problem is to unwarp the 
darn thing. Putting pressure on it by forcing something between the 
front rail of the key frame and slip is not kosher for obvious reasons 
and I personally wouldn't go there unless it was a last resort for a 
very temporary solution.

Some key slips have a metal slip screwed along their insides which 
resists any warping tendencies and allows to some degree to bend the 
warped area back into line. A heat gun normally does the job nicely in 
slip thats just wood.

Sometimes the cheek block holding wedges need to be modified as well.

Cheers
RicB


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