KAWAI GRAND PIANO REGULATION MANUAL

2y ago
122 Views
3 Downloads
1.95 MB
28 Pages
Last View : 13d ago
Last Download : 2m ago
Upload by : Raelyn Goode
Transcription

K AWA I G R A N D P I A N OR E G U L AT I O N M A N U A LVol 1.6 2013/1/15Piano LaboratorySupervisorKazuo Goka1

Index1.Tighten Plate Screws . 32.Action Location . 43.Ease Keys . 54.Bed Keyframe . 75.Travel, Angle Hammers. 86.Space Hammers to Strings . 97.Space Levers to Knuckles, Wippens to Capstan Screws . 118.Repetition Spring . 129.Jack Alignment, Height. 1310.Key Height . 1411.Hammer Blow Distance. 1512.Hammer Rest Rail . 1613.Hammer Letoff . 1614.Hammer Drop . 1715.Key Dip . 1716.Back Checks. 1917.Back Stop . 2018.Repetition Spring (recheck) . 2019.Balance Rail Studs . 2120.Damper Lift . 2221.Damper Stop Rail . 2422.Damper Pedal. 2523.Sostenuto . 2624.Una Corda . 272

1. Tighten Plate ScrewsThe plate will have countersunk screws whichshould be checked for tightness using ratchethandle with Phillips No. 4 head, or similar. On anew grand piano the screws should be checkedcarefully, because the bolts are lubricated wheninstalled and can be over-tightened. Even on anolder piano we would not expect to get much morethan one quarter turn on some of the screws.For Shigeru Kawai pianos only, plate screws have 2types. There are hexagonal head screws aroundthe outside, countersunk Phillips screws on thepinblock section. These should be tightened with a17mm socket for hexagonal screws and Phillips No.4 head for the countersunk screws, as with theregular Kawai models.*Note: Shigeru Kawai pianos now use a machinebolt around the rim perimeter. This is threadedinto a steel plate support, and should not need to betightened.*Some old Kawai pianos use 14mm screws aroundoutside and a pin block area.Caution: Do not tighten the nose bolts.Other case parts such as hinge screws, music deskglide screws, lock bar screws, etc. may be tightenedas required.BE CAREFUL TO NOT OVER TIGHTENSCREWS. THEY CAN BE OVER-TURNED ORBROKEN.3

2. Action LocationHammer No. 88 should strike the string 2.16mm- 3.0mm from the capo bar. The final locationshould be chosen by the sound.To move the action forward glue a shim (thin woodveneer) onto the hard wood block at the back side ofthe Keyframe. To move the action back, file thewood block. After the block is set correctly, thenadjust the keyframe guides in the cheek blocks tomatch.If most hammers are aligned towards the left fromstrings, glue a shim (wood veneer or thick paper) tothe back side of Action Block.4

3. Ease Keys3.1 Front hole bushingWhile holding the balance rail, check the lateralmovement of the keys in the rest (up) position.Also check with the keys in the pressed (down)position. Proper gap should be 0.2 mm to 0.3mm,with a small but clear “knock” sensation.Easing a tight front hole bushing using key pliers3.2 Balance hole and balance bushingCheck the lateral movement of the keys in the restposition (up) and in the pressed (down) position.5

Ease any tight balance hole bushings with keyeasing pliers.Lift up the Key back 1 – 2mm and release. Itshould fall down slowly by its own weight, withoutsticking. For best results, key should fall moreslowly in humid season, and a little faster duringdry season.If the key sticks then ease the balance hole. Thisprocess must be done carefully until the key moveswith the desired ease, but is not too loose.*Do not ease the front and back of the balance rail.Only ease the sides of the hole by turning theeasing tool inside the key so that the flat surfacesface front to back, then apply pressure to the hole.*If the balance hole is loose on the pin, apply a fewdrops of alcohol and water (Isopropyl 70%) to thehole then set aside. Once it is dry, re-fit it to thepin.6

4. Bed KeyframeRaise all of the bedding screws so that they are notin contact with the keybed.Place the fingers of one hand against the front railand keybed, then tap the keybed with 3 fingers ofthe other hand. Listen for a knock noise and feelfor movement between the front rail and thekeybed.If there are loose areas, pull the keybed out andtrim the tight areas with a plane or sanding block.As you remove wood from the tight areas, the looseareas will settle down and become tight* Note: It is normal for the keyframe front rail tolift up at the ends during dry weather. Be awareof the relative humidity when bedding thekeyframeFor the back rail, remove the keys and tap on theaction bracket supports to check for knocking. Ifneeded, trim the bottom of the back rail at the tightareas with a hand plane or sanding block, whichwill lower the loose areas and eliminate knocking.Adjust the pressure screw in the cheekblock forlight pressure on the guide pins. This will preventknocking of the keyframe during dry weather.*Note: Keep the balance rail bedding screwsraised until later in the regulation process. Thisprevents errors in setting the key height and keydip.7

5. Hammer Travel & AngleLift a group of hammers by hand or with a straightedge and look for sideways movement as thehammers travel upward.When the hammer was down, the hammer wasevenly spaced. When raised, the hammer hasmoved to the side, indicating that it is not movingstraight up.Place a piece of travel paper between the flangeand hammer rail on the same side of the screw asthe direction the hammer is traveling. Differencesin thickness or length of paper will determine thedegree of correction.*Note: the travel paper should not be visible oncethe flange is screwed back into place.Check the hammer angle at rest position. If thehammer molding space is equal but hammer tip isnot equal, the hammer is angled.8

Checking hammer angle – spaces betweenhammers must be equal and parallel at the “rest”position.If an error is detected then the shank can be heatedup and then carefully and very gently twisted backinto the correct alignment position.*Do not use excessive force as this will stress theflange and possibly damage the bushings.After the hammer angle is corrected.6. Space Hammers to StringsFor single and bi-chord notes, the hammers should becentered under the strings.*Note: Double-check that the soft pedal is adjusted toallow the action to return all the way. Press the soft pedaland insert a strip of paper between the keyframe and theaction stop block. Release the soft pedal and the keyframewill return and trap the paper strip. The paper should befirmly gripped and cannot be pulled out until released byagain pressing the soft pedal.9

The contact point of the hammer is centered under thebichord strings.In the trichord note section the bass side of the hammershould 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 whilelooking down between the strings.10

Adjust the left edge of hammer to be even with the leftstring. After all hammers are spaced even with the strings,remove the metal ruler from the action stop block.7. Space Wippens to Knuckles, letoff buttons and CapstansThe knuckle should be centered on the repetitionlever, the capstan on the repetition cushion and thejack on the regulating button.To adjust lateral position of the wippen, loosen thescrew and shift the wippen over, or insert a piece oftraveling paper behind the wippen flange on theside that you want the wippen to move towards.To position the jack tender under the let-off button,insert traveling paper underneath the side of thewippen flange that you want the jack to movetowards.11

When spacing wippens, use a mirror to watch thejack tenders, and also verify that the wippen heelsare centered on the capstans.8. Repetition SpringStrike the key normally and slowly release. Therepetition spring should carry the hammer back upin a slow, easy movement without jumping orcatching. If the movement is too slow, dislocate thetop section of the spring and pull upwards.If the movement is too fast, press the springdownwards as shown.*When pressing or lifting the spring, you need toonly change the shape of the coil portion of thespring, not the shape of the curve area.*Always re-check the spring strength with theaction in the piano.12

9. Jack Alignment, HeightAlign jackAlign the back of the jack (nearest the hammers) tothe back of the wood core of the knuckle by turningthe jack screw in or out. When checking thealignment, be careful of your eye angle to makesure the jacks are aligned correctly.Repetition Lever heightThe top of the jack should be placed slightly lowerthan the repetition lever (0.1 mm to 0.2mm).When turning the regulating screw, depress therepetition lever to avoid damaging the felt buttonand pad.To check repetition lever setting:To check the repetition lever height, with thehammer in the “rest” position gently and slowlypress down the jack heel. The hammer shouldbarely move. If it drops but doesn’t return whenthe jack is released, then the repetition lever is toolow. If the hammer does not move when the jackheel is pressed, then the repetition lever is too high.13

10. Square and level KeysShould be 66mm to 68mm from Keybed to the topsurface of the white key, depending on the model.Set sample keys at each end, then level all keyswith a straightedge.MODELSSKEX EX GS100SK-7 RX-7SK-6 RX-6RX-A RX-BSK-2.3.5 RX-2.3.5.NEOTEX68.0mm68.0mm66.0mm66.0mmPlace thicker punchings lower on the pin, andthinner punching paper above, just under the feltpunching.Square the keys so that the top surfaces arehorizontal, by tapping the balance pin side to side.14

Adjust Black Key Height 12.5mm from White keytop.11. Hammer Blow DistanceSet sample hammers to the correct blow distanceat both ends of each section. Hold the blowdistance gauge between one hammer and thestring, then adjust the capstan on the nexthammer so that it matches the sample. The blowdistance should be 46mm.Once sample hammers are set, slide action out andregulate the capstan screws in the remaininghammers to form a straight line.Level Hammers in each section using the capstanscrews.15

12. Hammer Rest RailSet the hammer rest rail 5mm below the hammershanks in the rest position.13. LetoffAdjust hammer letoff Distance.To improve accuracy, place a light directly abovethe string and watch the string’s shadow on thehammer felt.Press each key down slowly with one hand whileadjusting the letoff dowel with the other hand toset the letoff distance.In the bass section letoff should be 2.0mm - 2.5m,middle and treble 1.0mm - 1.5mm.16

14. Hammer DropRegulate each hammer so the drop screw touchesthe top of repetition lever at the same time the jackshould touch the regulating button. The initial falldistance of the hammer will be the same as theletoff.*Make sure to re-check this with the action inposition in the piano itself.15. Key Dip15.1 White Key DipUsing a dip block, 10.1mm, depress each key andcompare with height of the neighboring key. Addor subtract punchings until desired dip is achieved.Put paper punchings under cloth.*Make certain that the same pressure is usedthroughout the key board. Move back and forth tore-check your finger pressure as you regulate.Another way to double check for evenness is topush down 3 keys with 3 fingers using samepressure and compare the Dip.*Thicker paper lower, thinner paper upper.Maximum of 4 of any one size.17

15.2 Black Key DipSet the black key dip by comparing the feel of theaftertouch in the white keys with that of theneighboring black keys.Remove or placepunchings underneath until the aftertouch feel isthe same. Put paper punchings under cloth.*When checking aftertouch, the dampers should belifted up with pedalThicker card and paper should be lowest on thepin, thinner paper upper. There should be nomore than 4 of any one thickness paper.Black keys should be about 2mm higher thanwhite keys, when black keys pushed down tobottom.18

16. Back ChecksCorrect backcheck angle.If setting the backchecks to the correct specification(15mm from string) results in the hammer taildragging on the backcheck during fortissimoplaying, then the backcheck angle is too steep.When key is played and the hammer is incheck, tap the hammer down into thebackcheck. If the hammer can be pushed down allthe way, then the backcheck angle is too vertical.AlignmentUsing bending pliers, space the back checks so theyare even and square to the hammer tails. The backcheck wire must be bent twice, once at the bottomand the opposite way at the top.The backchecks must be uniformly spaced andtheir back surfaces parallel to the hammer line19

17. BackchecksThe hammer top should be an average distance of15mm from the strings with the key is played andthe hammer is in check. Set the outer key of eachsection then align the other keys.Check to see that the hammer tails do not drag onthe back check by moving the key with one handand pushing down on the hammer with the other.If the tail drags, adjust the angle of the back checkagain.18. Repetition Spring (recheck)Re-check the repetition spring regulation aftersetting the backchecks.20

19. Balance Rail StudsWhen regulated correctly, the balance rail studs(glide bolts) should just touch the keybed, but notlift the balance rail. Knock on the tops of the keyswhile turning the screw, lowering the studs just farenough to stop the knocking noise.Then lift up on the hammer rail with one handwhile knocking on the tops of the keys with theother hand. Check for even pressure for each of thestuds.For left side stud, push Una Corda Pedal slightly tocheck.Start by setting the stud at the tenor break (justabove the bass section), then set the bass end andrecheck the tenor break stud again. Then movetowards the treble (right) side, re-checking theprevious stud each time.Then re-check them again with the damper pedalpressed down.Finally, adjust the 1 or 2 hidden studs underneathusing pliers or 12mm wrench.A long straightedge can be used to set the hiddenbalance rail studs.Finally recheck all the studs using the knock testfrom above.21

20. DamperAlignmentAdjust the dampers so they are seated squarely onstrings.Make sure the dampers travel straight by bendingthe damper wire twice.Keep the damper wire and damper head parallel.When you push up damper lever slowly thebackside of damper should lift up very slightlyearlier than front side.The damper wire should be at right angles to thebottom surface of the damper head, but thedamper head should still lift slightly from backfirst.22

Level Damper LeversLoosen all damper block screws, and adjustdamper lever capstan to make the damper leverssame height. Place a ruler on top of the damperlevers as shown to assist in adjusting the capstans.Place a 2mm thickness paper punching betweenthe pitman and the damper lift rail.Initial Damper liftAdjust pedal rod head to set the sample damperlevers so that they start moving when the hammeris 23mm (1/2 blow distance) from string.Tighten damper wire screws for sample damperlevers in each section.Reinstall the action and check the damper lift.Once the samples are set, tighten all damper wirescrews, then remove paper punching and correctthe damper head alignment.23

Damper lift with PedalOnce dampers are tightened and aligned, recheckthe dampers for even lift with the damper pedal.To adjust, loosen the screw in the dampertop flange and move the lever up or down.*Do not use the capstan screws for this adjustment21. Damper Stop RailPress a black key and lift the damper head to seehow much movement is remaining. (1 to 2 mm ispermissible)Make certain that the damper levers will not touchthe sostenuto rod even if the lever is lifted upstrongly.24

22. Damper PedalAdjust the damper tray height.There must be slight lost motion in the damperpedal (approx. 1 to 2 mm), which is adjusted usingthe head of the pedal rod.The head and pedal lever should be adjusted tocreate lost motion at the damper lever.Tighten the bottom lock nut with 10mm wrenchwhile holding the pedal rod with the other hand.Pedal Stop CapstanThe dampers should be lifted to the same heightwith the pedal as they are with the black keys.Adjust the pedal stop capstan so that the pedal liftmatches the black key lift.25

23. SostenutoSet the height of the sostenuto rod to be slightlyhigher than the tabs on the damper levers.Then adjust the sostenuto bracket screws so thatthe rod does not cover the tabs when viewed fromabove. Tightening the bottom screw will bring therod closer to the tabs. Tightening top screw willbring rod away from the tabs.*Adjustment should be uniform across the rodfrom bass to treble.*When one screw is tightened, the other should bebacked off by the same amount to avoidunnecessary tension.Adjust the lift height (sostenuto rod angle) with thecapstan under the keybed. The sostenuto pedalshould hold the dampers at the same height as thekey.*Test by pressing the pedal and strikingnon-sustained keys with forte blows to make surethey will not catch.*Check that sostenuto function works for alldampers.26

24. Una CordaWhen the una corda pedal is pressed all the waydown, the hammer should strike only 2 strings inall 3-string notes (tenor and treble sections).The left string should not be struck.Shift pedalAdjust with the nut at the top of the pedal rod sothere is no lost motion in the pedal. Adjust thescrew in the right cheek block so the action willshift, allowing the trichord hammers to clear theleft string, and all hammers should strike thestrings halfway between string marks.27

KAWAI GRAND PIANO 6868Key nce46464646464647474746464646464646464646464646Let OffBas. Mid. Tre3.0 2.5 2.02.5 1.5 1.52.5 2.0 1.52.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.0DropBas. Mid. Tre3.0 2.5 2.02.5 1.5 1.52.5 2.0 1.52.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.02.0 1.5 1.0BackCheck17B16 MT14B17 MT15B16 MT14B16 MT14B16 MT141515151515151515151515151515151528

action in the piano. 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 you

Related Documents:

Yamaha CX7: RitMuller GH272R: 50,000.00 30-90 days: 14 Grand Piano, Polished 5'5" Kawai: GX-1 BLAK Pearl River: GP160 10,000.00 : 30-90 days Kawai: GX-1 BLAK 20,785.00 : 20 days 15 Grand Piano, Satin 5'5" Kawai GX-1 BLAK: Pearl River GP160: 12,000.00 30-90 days: Kawai GX-1 BLAK: 20,785.00 30 days: 16 Grand Piano, Polished 6'2" Kawai .

Th e Kawai EX concert grand piano is widely regarded by professional pianists and piano technicians as one of the fi nest instruments within its class. Hand-built by Master Piano Artisans at the Shigeru Kawai Piano Research Laboratory in Ryuyo, Japan, each EX instrument undergoes a

The 42nd ARD International Competition (Germany), first prize winner selected Kawai . China Conservatory of Music International music halls and institutions with Kawai pianos installed 2016 MMR Product of the Year (GL series Grand Pianos) 2016 MMR Home Digi

Artists still delivers a remarkably traditional piano playing experience. Th is is thanks to the instruments’ understated cheekblock control panels and handsome cabinet designs, with a selection of distinctive grand piano-like characteristics that celebrate Kawai’s rich, classical pedigree.

Southern Keyboards Distinguished Owners Customer Type City Unit 1ST BAPTIST AUSTELL CHURCH AUSTELL KAWAI STUDIO PIANO 1ST BAPTIST BUCHANAN CHURCH BUCHANAN KAWAI 5'1" GRAND PIANO 1

Grande Valse. Piano. Les Lavandières de Santarem. Gevaert, François-Auguste Redowa-polka. Piano Arrangements : La Sicilienne. Piano. Stella. Pugni, Cesare Valse brillante sur "Jenny Bell". Piano La villageoise allemande. Piano Memoria-speranza. Piano Arrangements. Piano. Chanteuse voilée. Massé, Victor Hommage à Schulhoff. Piano Grande .

229 Piano Solo B Bagatelle, Op. 119, No. 3 Beethoven Alfred 229 Piano Solo B Ballade Burgmuller Bastien Piano Literature 3 229 Piano Solo B Bouree (A) Telemann Cmp More Easy Classics to Moderns, Vol 27 (Agay) 229 Piano Solo B Coconuts Sallee, Mary K. Fjh 229 Piano Solo B Dark Horse 229 Piano Solo B El Diablo Alexander Alfred

Linkin park numb piano sheet music. Linkin park numb piano notes. Linkin park numb piano easy. Linkin park numb piano keys. Linkin park numb piano mp3 download. Linkin park numb piano chords. Linkin park numb piano notes letters. Didn’t find a song? Try to search for a track name using the search box below or visit the roblox music codes page.