{"product_id":"backchecking-from-hammer-line-gauge","title":"Backchecking from Hammer Line Gauge","description":"\u003cp\u003eThis gauge allows backchecking to be regulated by measuring up from the hammer line as opposed to down from the strings. Instructions:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eBlow distance and key dip must be regulated first\u003c\/li\u003e\n\u003cli\u003eMove the action to any relatively flat surface\u003c\/li\u003e\n\u003cli\u003eSubtract the desired backchecking distance from the blow distance to determine the backchecking height above the hammer line\u003c\/li\u003e\n\u003cli\u003eWorking section by section, replicate key dip by shimming the front rail or allowing it to overhang the edge of the work surface\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWork through the section, iteratively play a key, observe the backchecking height by resting the gauge on the neighboring hammers, and adjust the backcheck as necessary\u003c\/li\u003e\n\u003cli\u003eTip: Before moving on to the next section, also regulate drop and repetition spring strength\u003c\/li\u003e\n\u003cli\u003eTip: You can use the gauge to reach in between the hammers to adjust the backcheck away from the keys.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eThis method is great primarily for at-the-piano regulations.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThere's no need to create backchecking sample notes across the action\u003c\/li\u003e\n\u003cli\u003eIn fact, there's no need to do any sampling of the piano at all\u003c\/li\u003e\n\u003cli\u003eReplicating key dip section by section is much easier than repeatedly pulling the action out to adjusting sample note backchecks and returning the action to testing the backchecking distance; it also makes drop and repetition spring strength adjustments more accurate\u003c\/li\u003e\n\u003cli\u003eThis method works without a Regulating Rack\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBonus: Free digital protocol included, \"Grandwork Hybrid Regulation Protocol III—Primarily at the Piano.\"\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLearn a fast and exceptionally accurate method for regulating grand actions at the piano with a minimal (or initial) investment in tools\u003c\/li\u003e\n\u003cli\u003eSee how this tool works in context\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Grandwork","offers":[{"title":"Default Title","offer_id":46256438116399,"sku":null,"price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0358\/9385\/files\/20260927_171236.jpg?v=1790555112","url":"https:\/\/grandwork.tools\/products\/backchecking-from-hammer-line-gauge","provider":"Grandwork Tools and Training","version":"1.0","type":"link"}