What Conrad said. I've done lots of them that way and never had an una corda problem. When you're in the field you need a 10 minute solution. Seems like the original question dealt with a Korean piano. I think most of them have steel angle iron to reinforce them and prevent warpage. As I recall one of those mfrs recommends putting one end on the floor, holding the other up, and pushing in the middle to bend the steel to correct the warpage. I've never had the guts to do it. Dean Dean May cell 812.239.3359 PianoRebuilders.com 812.235.5272 Terre Haute IN 47802 -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Conrad Hoffsommer Sent: Monday, June 23, 2008 6:35 AM To: Pianotech List Subject: Re: Keyslips making keys stick Richard Brekne wrote: > As I understand it, these solutions involve placing / gluing something > or another in between the front of the key frame front rail and the key > slip. If thats the case I see nothing elegant about the solution at all. > Simple perhaps, but no more so then a more appropriate fix. If this was > a good way of doing thing I am quite sure virtually every piano > manufacturer would have some kind of similar thing built into their > pianos from the get go. None do... and that should be a clue. > > If the thing it warped... unwarp it. > Cheers > RicB In an ideal world,yes. Local conditions sometime overrule. A.K.A. Expediency in the trenches. After trying the "right" way to cure the inward warping of the key slip more than once with the condition only returning, I happened to see a certain piano with this malady actually in use. (in a classroom) The teacher was leading the class from the piano... while standing. When not actually playing, the teacher would be leaning against the piano and pushing the key slip against the keys. An intervention had to be done. After experimenting on the thickness to regain clearance, I glued cardboard front rail punchings to the front of the keyframe. Haven't had rubbing keys since, and the una corda works just fine. I've had to do this on consoles, too, but gluing is not necessary. Flame me if you must, I'm doing some alpha testing on a new line... ;-} -- Conrad Hoffsommer, RPT - Keyboard Technician Luther College, 700 College Dr., Decorah, Iowa 52101-1045 1-(563)-387-1204 // Fax 1-(563)-387-1076 You have the right to remain silent. Anything you say can and will be used against you.
This PTG archive page provided courtesy of Moy Piano Service, LLC