-----Original Message----- From: erwinspiano at aol.com To: ilvey at sbcglobal.net Sent: Mon, 7 Jul 2008 2:33 pm Subject: Re: Keyframe Bedding The key frames in modern grands all have a somewhat arched/pinched key frame arrangement? front to back & end to end. Adjusting the bedding bolts to a neutral position to start with & then turning the bolts tighter against the key bed is where the stressing comes from.? You can measure the subsequent rise at the front of the keys as the bolts are being turned as ?per Jon Pages suggestion.? The back of the frame is held down by the dags & the ends by the key blocks ? Actually this is also a bit of a buffer or safety factor for climate changes. This way the bolts will hopefully stay in contact with the bed in each season & not be so prone to change with humidity & temp. ? Dale -----Original Message----- From: David Ilvedson <ilvey at sbcglobal.net> To: erwinspiano at aol.com Sent: Mon, 7 Jul 2008 11:42 am Subject: Re: Keyframe Bedding How are you putting a little stress on the keyframe?? David Ilvedson, RPT Pacifica, CA 94044 Original message From: erwinspiano at aol.com To: ilvey at sbcglobal.net, pianotech at ptg.org Received: 7/7/2008 11:40:02 AM Subject: Re: Keyframe Bedding Yes, putting a little stress on the keyframe. Actually it would be under a tensioning stress. I heard it first from R.Jolly & David Andersen. Whatever it works. ? Dale Stressing the keyframe??? David Ilvedson, RPT Pacifica, CA 94044 Jon ? Nice idea. Easy visual.? My kind of tehnique. Jon You probably of experienced this alreay. Stressing the keyframe a bit more also improves the sound. I've heard it dramtically on many pianos. It has to do with coulping the keyframe more intensely to the bed.? ? ? Dale Let's try something different, a piano related topic:? ? An easy way to set the glide bolts is with a caliper.? ? With the glide bolts off the keybed, measure a key? height in front of the bolt. Reset the caliper to .015"? to .020" higher and turn the bolt until the key touches? the caliper. Plus .010" at the ends is sufficient.? ? Apply slight upwards lift at the stack to see if the? glide bolt still knocks and tweak as needed.? This is an easy way to apply even pressure across.? ? Longer keys would necessitate a wider gap? measured with the caliper.? -- ? Regards,? ? Jon Page? The Famous, the infamous, the lame - in your browser. Get the TMZ Toolbar Now! The Famous, the infamous, the lame - in your browser. Get the TMZ Toolbar Now! The Famous, the infamous, the lame - in your browser. Get the TMZ Toolbar Now! -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20080707/6eb29879/attachment-0001.html
This PTG archive page provided courtesy of Moy Piano Service, LLC