5 DAY COURSE
COMPONENT TOUCH WEIGHT BALANCING & PRECISION TOUCHDESIGN
Presented by Stanwood Piano
Taught by David C. Stanwood and Frans Pietjouw
PrecisionTouchDesign is used
in conjunction with high quality regulation,
tuning, and voicing to create pianos that feel, sound, and play more smoothly, more
comfortably, and with a wider range of tone than has ever been possible before.
Precision Touch Design, also known as PTD, embraces the central importance of weight, leverage, and friction components to the consistent production of fine pianos. This new knowledge, made possible by David C. Stanwood's creation of The New Touch Weight Metrology, has opened up a whole new discipline in the field of Piano Technology - Component Touch Weight Balancing.
In 5 days, attendees will cover all aspects of component touch weight balancing. Graduates who qualify may enjoy the benefits of becoming a Licensed PTD installer or they are free to practice component touch weight balancing on their own without the benefits of being a PTD Installer.
Note: Calculating smooth Keyleading specifications with the equation of balance is patented in the United States (US pat #5585582) and available in the US for use only by licensed PTD installers. Alternative public domain key balancing methods will be taught for the benefit of those who will not become licensed PTD installers.
Applying for the Course:
The applicant must be in good standing in the piano technician trade and provide three written references from pianist clients or fellow technicians.
The applicant must have thorough knowledge of tuning, regulation, and voicing and provide a detailed description of their History and experience in the trade.
Inquires in Europe should be sent to Frans
All other inquires should be sent to David C. Stanwood email@example.com
COURSE DESCRIPTION 2009
PTD Installers Course is given in November, March, and June.
The course is given with four Students and two instructors
Instructors are David C. Stanwood (US) and Frans Pietjouw (Holland)
Courses are given either at Stanwood Piano Innovations on the Island of Martha's Vineyard Massachusetts in the US, or at the Shop of Frans Pietjouw Piano Atelier on the Island of Goeree Overflakkee in the Netherlands.
Attendees bring their own action which they improve with Precision Touch Design
Theory and derivation of the Equation of Balance and overview of "The New Touch Weight Metrology"
Historic overview of piano evolution in terms of hammer weight, ratio, and key balancing including an overview of "what's out there these days" in terms of the New Touch Weight Metrology"
History of the development of Precision TouchDesign (PTD)
The effect of Regulation on the analysis
Preparation of the action for measuring up weight and down weight with Dry Lubrication, Key Easing, Action Centre treatment
Measuring up weight and down weight
Calculating Balance weight and Friction Weight using the Polar Rule (circular Slide Rule)
Isolating and measuring the key bushing Friction
Isolating and measuring capstan-heel friction
Understanding the measurement of rotational flange friction and it's effect on total friction
Isolating and evaluating knuckle-jack friction
Measuring hammer weight "on the shank" with Strike Weight measurement.
Predicting Strike Weight by measuring shank and hammer components
The effect of ambient humidity on hammer weight
Measuring the downward balance force of the keystick-keyleads using Front Weight.
Measuring key weight ratio (how weight on the capstan translates to upward force at the front of the key)
Measuring the weight of the wippen on the capstan
Direct measurement of Strike Weight Ratio by finding Strike Balance Weight with the short cut method for calculating and evaluating ratio
Measuring Damper friction and weight components.
Machine measuring of strike weight and hammer flange friction without removing parts
When and how to fill out and send the standard data forms to the PTDesigner
Measurement techniques for checking elevation of action centres
How to check for acceptable configuration of interacting arcs and spread distances.
The relationship of shank length to ratio
Hammer bore issues
Damper action geometry
Choosing the best PTD Type to match your clients needs:
Hammer Weight and Front Weight smoothing
Hammer Weight and Front Weight smoothing with capstan line change
High Performance add-ons:
Adjustable Wippen Assist Springs (used in conjunction with key leading)
Narrow keyboards for small hands through DS Standard
PTD treatment of the Damper action
PTD for upright pianos
Testing for the best "tone weight" of the hammer to help select best PTD
How to interview clients in order to make various determinations to help choose the best configuration of the PTD
PTD issues with special needs clients, repetitive stress, carpal tunnel syndrome, tendonitis, weakness, etc.
Methods for selling and promoting PTD - such as having clients play on pianos with PTD
Promoting through advertising - Best methods for advertising
How not to sell PTD!
Database management of your PTDs
Advertising and trademark issues
Issues of installing PTD on new pianos under warranty
The PTD warranty
Preparing the Action for PTD installation:
PTD issues when selecting new parts
How to determine the new balance point of the keys in order to correct key ratio when having new keyboards made.
Safe and efficient methods for punching out all the old Key leads
Method for removing key leads in blind holes
Methods and equipment for containment of toxic lead residues
Filling the old key lead holes with a special epoxy putty dyed to match the key-stick wood (the best look and most efficient method for new pianos especially). Also discussion of using wood plugs
Speed techniques for removing capstans
Techniques for filling capstan holes in soft wood keys and keys with hardwood capstan shoes.
How to cut off wippen heels if needed
Installing the PTD:
How to Read a PTD specification sheet
How to add weight to Hammers to make a Strike Weight specification using hammer leads
How to add weight temporarily to hammers using clip weights
How to remove weight from hammers to make a PTD specification
Sorting shanks by weight when installing new shanks
Finding the new capstan line in order to make a ratio specification (with existing heels or with heels moved)
How to choose and install new heels
Mocking up to check Dip/Blow relationship to evaluate the choice of ratio specification
Modifying action geometry to produce a more efficient dip-blow relationship
Speed method for drilling and driving capstans
A special method for modifying balance rail punchings in order to effect ratio and make the action lighter or heavier
Determining when and how to move the knuckles
Installing key leads to make a Front Weight specification using the Tower Pattern
How to design your own tower patterns
"Inertial moment" Issues regarding the tower pattern radius (key leads oriented towards the front of the key, around middle of the key, or closer to the balance rail)
How to drill the key lead holes and install the key leads to the PTD specification
Overview of tolerances for making PTD specifications
Adjusting Damper Weights to a PTD specification
How to make a key have any Down Wt / UpWt of our choosing
Adjusting Touch Weight with adjustable support springs for long term stability using the BW system
How to make your own gram weights in incremental steps weights from 15 - 104 grams (Materials available only in the US)
PTD products available through outside suppliers
Touch Designer Toolkit - Pianotek Supply
Master Touch Gram Weight Set - Dawn Herring Piano Service
Issues for the client "down the road"
including the PTD certificate and replacement hammer weight
The attendee will pay a training fee of _$2.500,00
The attendee will pay their own expenses including travel, room, and board.
The attendee will bring or ship ahead to the training location, a suitable action in which they will install a PTD.
The attendee will pay 1/2 of the training fee one week in advance of the course and the remainder upon completion.
If attendees want to include High performance options such as a whippen spring conversion on their training actions they agree to pay normal fees for the installation of such options. For adjustable wippen springs the cost is $600 in the US. (Tokiwas makes adjustable wippen support spring parts) For cost of wippen springs in Europe see www.pianoman.nl
Upon starting the course attendees will sign an agreement regarding appropriate use of the knowledge they will receive during the 6-days. This agreement restricts the use of Stanwood name, logos, or trademarks, as well as the copying of written material or the rewriting and distribution of printed material that is given during the course.
Upon the completing the course, graduates who qualify, may become licensed PTD installers under the following terms.
PTD Installers participate in knowledge and experience sharing through a private e-mail list.
PTD methods are constantly upgraded as new information comes in
PTD Installer may use PTD logos and trademarks in there advertising and promotion
PTD installers agree to have their component touch designs created only by consulting with an approved PTDesigner who will provide the installer with analysis graphs, PTD specifications, and a PTD Certificate which gives replacement hammer weight specifications and instructions for maintaining the PTD
A one time consultation fee of _$300.00 is charged for the creation each PTD.
PTD Installers agree to use approved wippen spring conversion service.
February 13, 2009
David C. Stanwood