Showing posts with label hammers. Show all posts
Showing posts with label hammers. Show all posts

Saturday 30 August 2014

New Pianos

Surely, buying a new piano should to be straightforward enough, shouldn't it? As there are not so many piano shops around, if you wish to compare prices or try pianos in more than one shop, your hunt for a new piano will mean a good deal of travelling.

A piano can seem perfect in the shop, but at home in your music room, the sound hardens into a strident, in-your-face tone which is difficult to control and hard on the ears. Second thoughts, regret and disappointment are not easy to overcome when you have bought an expensive piano. Surely a piano costing so much should be satisfactory from Day One!  

It is not uncommon, as a technician, to be called in to deal with a brand new, expensive and newly-delivered piano that is terribly out of tune and/or the action is very heavy and difficult to play. Promises that the action would loosen up or the tone would mellow after being played for a while, prove to be disappointingly empty. The owner is very unhappy - and understandibly cross that there is a problem at all!

These issues can all be sorted but not in about 10 minutes. It is not rare to find a brand new piano which is so heavy to play the action needs re-centring. Frequently one finds keys that are sluggish, hammer-felts that are as hard as nails, notes going wildly out of tune or pedals that squeak every time they are pressed down. 

I have a great deal of sympathy for New-Piano-Buyers who feel so let down by their new piano. Piano brochures - without exception, make bold claims about the quality and care of manufacture. But sadly, too often, modern pianos never quite live up to expectations. 

In an ideal world, all pianos would be ready and 'match fit' long before it is delivered to the home of an excited pianist who has invested their hard-earned money in their dream piano. 

Perhaps 50 - 60% of new piano owners would say they are totally satisfied with their purchase. Possibly, the tuner/technician's satisfaction rate would be rather less, but the reality is that if brochures were written by the purchaser there would be less use of extravagant superlatives to describe the piano. 

Buyers should insist on standards that match the price they pay for a piano. One expects the quality of a cheap piano to match its low price. Equally, the quality of an expensive piano ought to be at least as high as the price - certainly, no lower!


Tuner's Journal

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Pianology

Wednesday 13 August 2014

Bechstein Model 9 Repair


The Repair of a Bechstein Model 9.

The model 9 is my favourite Bechstein upright - providing it is not too old! Before taking the action to the workshop, I quickly raised the pitch so that the final tuning - after the repairs - ought to be nice and easy! 

As it was, the piano played almost acceptably - hints of a few lurking problems, misfiring notes etc. and for a Bechstein, a heavier touch than normal! Looking at some of the flange centres today, it is hard to understand how it worked at all. It is remarkable these pianos just seem to keep working even when the centre-pins are very stiff.

Cleaning the keys:  Getting the grime off the sides was not a pleasant job - the dirt was black, thick and greasy. The wood of the keys is now beautifully clean - good as new!
Damper Springs fitted

Work on the dampers - new springs, re-centring - and recovering the felts. All somewhat tedious and time-consuming but so important to get these things 'just-so!'

Felts recovered.
Fortunately, the hammers seem to have remained clean since a moderate overhaul - I reckon sometime during the 1960s.
Piano repair complete!  - A fine example of a Model 9.
Refitting the repaired parts is very rewarding! it means the job is progressing well and nearly done! Once all back together the regulation begins. This is the most important part. Everything has to work in sync to get the best from the piano.


There we have it! The repair is now complete and once again, the lovely qualities of the instrument are restored - smooth, light touch and a clear and strong tone!

Tuner's Journal

© 

Wednesday 1 January 2014

Replacing Hammer Heads

Replacing Piano hammers is not a quickly done job. It can appear easy and straightforward to take off the old hammers and and replace them with new ones, but like everything else to do with a piano action, unless the job is done neatly and evenly, the end result will be a poorly sounding piano and a miserable technician! Not what you want after an expensive and time-consuming project.

The cost of a set of piano hammers is more than most people would like to spend on an interesting experiment. If the experiment goes wrong, you will have to spend more money get someone to fix it. A set of new hammer heads must match the old ones. A 5mm difference here or a slight change of angle there, will only guarantee you yet more hassle and grief to get the piano to play properly when you've done all the work.

The first job is to dismantle the action. (The job is similar for a grand piano but for the sake of clarity, the instructions here are for an upright piano.) Disconnecting tapes and taking off the levers will give good access to the hammer flange screws. Take the hammers off, place them on a tray and number them – just in case they, for some reason, get mixed up. Most new hammer heads come already bored - if your set is not already bored, you have yet another 'mountain' to climb. The secret of success in action work is in the precision and care with which it is carried out.  
Removing the old hammer heads from the shanks is done one at a time, using a special tool called a shank extractor. Some technicians like to leave guide hammers on the action so that the new hammers can be lined up to keep the same line as the old ones. Other technicians prefer to take exact measurements from the each hammer as it is being dealt with. If guide hammers are used, it is important to fit the right hammer head to these guide hammers. 
With the old head removed, the shank cleaned of old glue, (any broken shanks replaced) it is quite simple to glue the new hammer head onto the shank. It helps if the fit is firm and snug without being too tight. If the fit is on the tight side, take care not to twist the shank when fitting the new hammer head. Brittle, old shanks break easily. 
When ready, refit the hammers back onto the action frame. The ‘noses’ of the new hammers heads should be in a nice straight line. There is a number of ways of replacing hammer heads, all of them are perfectly acceptable if done well. Fitting the hammer heads to new pianos is done in seconds, but away from the factory, dealing with replacement parts it is a much slower process. 

Putting the action back into the piano is the start of another set of very technical adjustments to ensure the proper working of the piano action.
Do not underestimate what is involved in getting a piano to work well. A change to any part in the fabric of the mechanism has a knock-on effect on the function of the action, how the piano plays, and how it sounds. 

If only replacing piano hammers were like replacing a failed light bulb! Then, any careful amateur could do it. But the reality is that replacing hammer heads is not really a job for the amateur - at least not without professional advice and help. 

At best, this article can only be an introduction to the very basics of the job. So please, be careful!

Technical File

© Steve Burden

Sunday 6 May 2012

Piano Action and Keys

The piano action and keys are the great link between the pianist and the music heard by the listener. This sophisticated mechanism is capable of a vast range of dynamics and expression - it is a masterpiece of engineering. Every one of the eighty-eight notes has it’s own key, it’s own hammer, it’s own strings and it’s own set of levers. 
The movement created by depressing the key, is delivered to the hammer via a series of levers. The hammer strikes the string - thus generating the audible musical sound of the chosen note.

The design of the piano action has altered very little over the last 120 years or so, which means that the basic piano action design was perfected long before the computer was even thought of - let alone being brought in to help. Those who devoted themselves to the task of developing the piano action, used sheer inventiveness and dedication to get their ideas to work.


A grand piano action

A quote from a book about piano action design by Walter Pfeiffer: “...the action is that much closer to perfection the less the player is aware of it” 

The modern piano has the potential to achieve this lofty state of function. Pianists, not having to worry about the technical aspects of the mechanism, are free to give themselves to making music. 

Technicians strive to get the very best out of a given piano. With their detailed understanding of the workings of the action, the piano becomes far more than just a machine. The less the player is aware of the mechanism, the more able is the artist to explore that mysterious zone only a musician understands - and thus the piano is to closer to perfection. 

The Piano World

© Steve Burden