65 grams weight for key balance
65 grams weight for key balance
SKU: 7291-1
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Instructions for Key Balance Optional 65 Gram Ring
Purpose - To extend the measuring range of the Key Balance to measure and diagnose upright damper spring tension from the front of key.
Using the Ring Conversion Scale - Slide the 65 gram Ring over the brass stub and position over the key that is being tested. With the damper engaged ( do not depress the sustain pedal), slide the indicator in the normal manner until the key drops to the point of escapement. Take the reading on the scale. Use this number on the left side of the conversion chart affixed to the ring.
Example: If the balance reading is 50 grams, the conversion is 80 grams. This would be the combined value of both the action and the resistance of the damper spring.
This is a diagnostic tool. You may subtract the down-weight value from the combined value to determine damper spring resistance at the front of key. In general, if the damper spring alone is as strong, or stronger than the down weight, then the damper spring tension is too high for smooth regulation and adds unnecessary touch weight.
Example: If down weight is 55 grams, combined weight is 115 grams, damper weight is 60 grams
Purpose - To extend the measuring range of the Key Balance to measure and diagnose upright damper spring tension from the front of key.
Using the Ring Conversion Scale - Slide the 65 gram Ring over the brass stub and position over the key that is being tested. With the damper engaged ( do not depress the sustain pedal), slide the indicator in the normal manner until the key drops to the point of escapement. Take the reading on the scale. Use this number on the left side of the conversion chart affixed to the ring.
Example: If the balance reading is 50 grams, the conversion is 80 grams. This would be the combined value of both the action and the resistance of the damper spring.
This is a diagnostic tool. You may subtract the down-weight value from the combined value to determine damper spring resistance at the front of key. In general, if the damper spring alone is as strong, or stronger than the down weight, then the damper spring tension is too high for smooth regulation and adds unnecessary touch weight.
Example: If down weight is 55 grams, combined weight is 115 grams, damper weight is 60 grams
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Pianos Bolduc, fabricant de composantes de qualité pour pianos, fabricant d'outils spécialisés et important reconstructeur de pianos, distribue des pièces et des fournitures pour les techniciens et reconstructeurs de pianos du monde entier. Ce catalogue a été spécialement conçu pour servir les techniciens, les reconstructeurs et les fabricants de pianos. Pour des conseils techniques, n'hésitez pas à nous contacter par courriel (info@pianosbolduc.com).