Related Manuals for Kawai SK-7
Summary of Contents for Kawai SK-7
- Page 1 K A W A I G R A N D P I A N O R E G U L A T I O N M A N U A L Ver 1.4 2011/7/21 Piano Laboratory Supervisor Kazuo Goka １...
- Page 2 Regulation Process Index １ Tighten all Plate Screws・・・・・・・・・・・・・・・・・・・・P3 ２ Strike Point, Keyframe Position ・・・・・・・・・・・・・・・・P4 ３ Ease Keys ・・・・・・・・・・・・・・・・・・・・・・・・・・・P5 ４ Bed Keyframe・・・・・・ ・・・・・・・・・・・・・・・・・・・P7 ５ Travel, Angle Hammers ・・・・・・・・・・・・・・・・・・・・・P8 ６ Space Hammers to Strings・・・・・・・・・・・・・・・・・・・・P9 ７ Space Levers to Knuckls, Whippens to Capstan Screws ・・・・・・P11 ８...
- Page 3 For Shigeru Kawai pianos only, plate screws have 2 types. There are hexagonal head screws around the outside, countersunk Phillips screws on the pinblock section.
- Page 4 ２．Strike Point, Keyframe Position Hammer No. 88 should strike the string 2.16mm - 3.0mm from the capo bar. The final location should be chosen by the sound. To move the action forward glue a shim (thin wood veneer) onto the hard wood block at the back side of the Keyframe.
- Page 5 ３．Ease Keys 3.1 Front hole bushing While holding the balance rail, check the lateral movement of the keys in the rest (up) position. Also check with the keys in the depressed (down) position. Proper gap should be 0.2 mm to 0.3mm, with a small but clear “knock”...
- Page 6 Ease any tight balance hole bushings with key easing pliers. Lift up the Key back 1 – 2mm and release. It should fall down slowly by its own weight, without sticking. For best results, key should fall more slowly in dry conditions, and a little faster during humid conditions.
- Page 7 ４.Bed Keyframe Raise all of the bedding screws so that they are not in contact with the keybed. Place the fingers of one hand against the front rail and keybed, then tap the keybed with 3 fingers of the other hand. Listen for a knock noise and feel for movement between the front rail and the keybed.
- Page 8 ５. Hammer Travel & Angle Lift a group of hammers by hand or with a straight edge and look for sideways movement as the hammers travel upward. When the hammer was down, the hammer was evenly spaced. When raised, the hammer has moved to the side, indicating that it is not moving straight up.
- Page 9 Checking hammer angle – spaces between hammers must be equal and parallel at the “rest” position. If an error is detected then the shank can be heated up and then carefully and very gently twisted back into the correct alignment position. *Do not use excessive force as this will stress the flange and possibly damage the bushings.
- Page 10 The contact point of the hammer is centered under the bi-chord strings. In the trichord note section the bass side of the hammer should overlap the left string 1mm. For easy hammer spacing, put 1mm shim (metal ruler) between keyframe and action stop block Use the Hammer flange spacer under the pin block while looking down between the strings.
- Page 11 With the 1mm ruler in place, adjust the left edge of hammer to be even with the left string. After all hammers are spaced even with the strings, remove the metal ruler from the action stop block. ７．Space Levers to Knuckles, Whippens to Capstan Screws The knuckle should be centered on the repetition lever, the capstan on the repetition cushion and the jack on the regulating button.
- Page 12 When spacing wippens, use a mirror to watch the jack tenders, and also verify that the wippen heels are centered on the capstans. ８．Repetition Spring Strike the key normally and slowly release. The repetition spring should carry the hammer back up in a slow, easy movement without jumping or catching.
- Page 13 ９．Jack Alignment, Height Align jack Align the back of the jack (nearest the hammers) to the back of the wood core of the knuckle by turning the jack screw in or out. When checking the alignment, be careful of your eye angle to make sure the jacks are aligned correctly.
- Page 14 Set sample keys at each end, then level all keys with a straightedge. MODELS NEOTEX SKEX EX GS100 68.0mm SK-7 RX-7 68.0mm SK-6 RX-6 RX-A RX-B 66.0mm SK-2.3.5 RX-2.3.5. 66.0mm Place thicker punchings lower on the pin, and thinner punching paper above, just under the felt punching.
- Page 15 Adjust Black Key Height 12.5mm from White key top . １１．Hammer Blow Distance Set sample hammers to the correct blow distance at both ends of each section. Hold the blow distance gauge between one hammer and the string, then adjust the capstan on the next hammer so that it matches the sample.
- Page 16 １２．Hammer Rest Rail Set the hammer rest rail 5mm below the hammer shanks in the rest position. １３．Hammer Letoff Adjust hammer letoff Distance. To improve accuracy, place a light directly above the string and watch the string’s shadow on the hammer felt.
- Page 17 １４．Hammer Drop Regulate each hammer so the drop screw touches the top of repetition lever at the same time the jack should touch the regulating button. The initial fall distance of the hammer will be the same as the letoff. *Make sure to re-check this with the action in position in the piano itself.
- Page 18 15.2 Black Key Dip Set the black key dip by comparing the feel of the aftertouch in the white keys with that of the neighboring black keys. Remove or place punchings underneath until the aftertouch feel is the same. Put paper punchings under cloth. Thicker card and paper should be lowest on the pin, thinner paper upper.
- Page 19 １６．Back Checks Correct backcheck angle. If setting the backchecks to the correct specification (15mm from string) results in the hammer tail fortissimo dragging on the backcheck during playing, then the backcheck angle is too steep. When key is played and the hammer is in check, tap the hammer down into the backcheck.
- Page 20 １７．Back Stop The hammer top should be an average distance of 15mm from the strings with the key is played and the hammer is in check. Set the outer key of each section then align the other keys. Check to see that the hammer tails do not drag on the back check by moving the key with one hand and pushing down on the hammer with the other.
- Page 21 １９．Balance Rail Studs When regulated correctly, the balance rail studs (glide bolts) should just touch the keybed, but not lift the balance rail. Knock on the tops of the keys while turning the screw, lowering the studs just far enough to stop the knocking noise. Then lift up on the hammer rail with one hand while knocking on the tops of the keys with the other hand.
- Page 22 ２０．Damper Alignment Adjust the dampers so they are seated squarely on strings. Make sure the dampers travel straight by bending the damper wire twice. Keep the damper wire and damper head parallel. When you push up damper lever slowly the backside of damper should lift up very slightly earlier than front side.
- Page 23 Loosen all damper block screws, and adjust damper lever capstan to make the damper levers same height. Place a ruler on top of the damper levers as shown to assist in adjusting the capstans. Place a 2mm thickness paper punching between the pitman and the damper lift rail.
- Page 24 Damper lift with pedal Adjust dampers so they lift evenly with the damper pedal. To adjust, loosen the screw in the damper top flange and move the damper up or down. *Do not use the capstan screws for this adjustment ２１．Damper Upstop Rail Press a black key and lift the damper head to see how much movement is remaining.
- Page 25 ２２．Damper Pedal Adjust the damper tray height. There must be slight lost motion in the damper pedal (approx. 1 to 2 mm), which is adjusted using the head of the pedal rod. The head and pedal lever should have lost motion of 1-2mm at the damper lever.
- Page 26 ２３．Sostenuto Set the height of the sostenuto rod to be slightly higher than the tabs on the damper levers. Then adjust the sostenuto bracket screws so that the rod does not cover the tabs when viewed from above. Tightening the bottom screw will bring the rod closer to the tabs.
- Page 27 ２４．Una Corda When the una corda pedal is pressed all the way down, the hammer should strike only 2 strings in all 3-string notes (tenor and treble sections). The left string should not be struck. Shift pedal Adjust with the pedal rod head and tighten lock nut so there is no lost motion in the pedal.
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