Yamaha Piano pedal mechanism

"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:00dd0ebd$0$13128$c3e8da3@news.astraweb.com...
Trevor Wilson wrote:
"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:00072947$0$4282$c3e8da3@news.astraweb.com...
Sylvia Else wrote:
The sustaining pedal on my Yamaha electronic piano is become rather
flaky. Sometimes it doesn't sustain when pressed.

So I disassembled the piano enough to get at the mechanism, (removed 12
screws, and 6 bolts), and was rather surprised to see that the business
end consists of a potentiometre.

I'm not really surprised that it's failing. In fact, the surprise is
that it's lasted so long. When a piano is played, the sustaining pedal
is in constant use. I can't help feeling potentiometres were never
designed with that kind of use in mind.

The design seems rather primitive.

Sylvia.
At least Yamaha are willing to supply just the pot. I was expecting them
to want to supply a complete replacement pedal mechanism, at some
exorbitant price.

Spares guy described it as a "volume" pot for the sustaining pedal :)

None in stock here, though - order from Japan - takes 4 weeks.

So much for supporting their product.

**How old is it? Beyond 7 years (or is it 5 now?) they don't have to do
diddly about spare parts supply, if they don't want to.

From the ACCC web site

"What is ‘reasonably available’ will depend on the particular
circumstances, such as the nature of the product and its expected useful
life. There is no minimum period for a manufacturer or importer to provide
facilities and spare parts for repair. However, a manufacturer or importer
will remain liable for damages for up to 10 years if the failure to
provide repair facilities and parts is found to be unreasonable."

This is a piano we're talking about, not an iPod. It cost not much shy of
$5000 seven years ago. I'd be surprised if a court found that it was
reasonable to cease supplying parts so soon.

Just appreciate that
they can get you the right part in 4 weeks. I could tell you stories
about ather brands, whose products have only been on the market for less
than 2 years and the parts are NLA. Yamaha, IME, are one of the better
companies for spare parts support.

OTOH, let your fingers do the walking and look through the Farnell
cattle-dog. They have some very superior quality parts, which you may be
able coax into the right spot.

Maybe, though when I went through Farnell's site yesterday, and considered
the mechanical requirements, I couldn't find anything suitable.

Sylvia.
I don't get what the problem is here. The pot has done 7 years. It's
knackered. Ho hum. Yammy will supply a direct replacement that will do
probably another 7 years for just $25 shipped. That's less than 7c a week. I
appreciate that the piano cost $5k (Aus ??) initially, but at the end of the
day, it's not exactly a Steinway, is it ? You could pay that much for a top
end LCD TV or a mediocre plasma, and find that you couldn't get parts, or
that they were prohibitively expensive, as little as 2 years down the line.

You might even have just been unlucky to have your pot fail in 7 years. If
Yammy don't have it available anywhere in your country, needing to de-stock
it from Japan, that might suggest that there is little call for
replacements.

Personally, I wouldn't give myself the grief of trying to shoehorn an
alternative in, with no guarantee that it's going to perform as the original
did, when a direct manufacturer's replacement is available at what I think
is a very reasonable cost, and with a life expectancy of at least another 7
years. Half of that cost is probably shipping and handling anyway, so get
two whilst you're at it for probably not a lot more, then you'll be ready to
roll again in another seven years ... d;~}

Arfa
 
"What is ‘reasonably available’ will depend on the particular
circumstances, such as the nature of the product and its
expected useful life. There is no minimum period for a
manufacturer or importer to provide facilities and spare parts
for repair.
There used to be.


However, a manufacturer
or importer will remain liable for damages for up to 10 years if the
failure to provide repair facilities and parts is found to be
unreasonable."

That's interesting. Could you point to a reference?


This is a piano we're talking about, not an iPod. It cost not much shy
of $5000 seven years ago. I'd be surprised if a court found that it was
reasonable to cease supplying parts so soon.
One shouldn't have to go to a court.
 
William Sommerwerck wrote:
"What is ‘reasonably available’ will depend on the particular
circumstances, such as the nature of the product and its
expected useful life. There is no minimum period for a
manufacturer or importer to provide facilities and spare parts
for repair.

There used to be.


However, a manufacturer
or importer will remain liable for damages for up to 10 years if the
failure to provide repair facilities and parts is found to be
unreasonable."

That's interesting. Could you point to a reference?
http://www.accc.gov.au/content/index.phtml/itemId/716812

Search the page for "spare parts"

The obligation to provide spare parts arises from the Trade Practices Act

http://www.austlii.edu.au/au/legis/cth/consol_act/tpa1974149/s74f.html

It's not clear where the ACCC got their figure of ten years from.

This is a piano we're talking about, not an iPod. It cost not much shy
of $5000 seven years ago. I'd be surprised if a court found that it was
reasonable to cease supplying parts so soon.

One shouldn't have to go to a court.
No, one shouldn't, but the courts are the final arbiters, so it makes
sense to base one's actions (to the extent that they're not voluntary
actions) on what the courts would decide if asked.

Sylvia.
 
However, a manufacturer
or importer will remain liable for damages for up to 10 years if the
failure to provide repair facilities and parts is found to be
unreasonable."

That's interesting. Could you point to a reference?

http://www.accc.gov.au/content/index.phtml/itemId/716812
Ah. I keep forgetting that a large percentage of the people in this group
aren't Americans. US laws are somewhat different.
 
"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:00124c02$0$19673$c3e8da3@news.astraweb.com...
William Sommerwerck wrote:
"What is ‘reasonably available’ will depend on the particular
circumstances, such as the nature of the product and its
expected useful life. There is no minimum period for a
manufacturer or importer to provide facilities and spare parts
for repair.

There used to be.


However, a manufacturer
or importer will remain liable for damages for up to 10 years if the
failure to provide repair facilities and parts is found to be
unreasonable."

That's interesting. Could you point to a reference?

http://www.accc.gov.au/content/index.phtml/itemId/716812

Search the page for "spare parts"

The obligation to provide spare parts arises from the Trade Practices Act

http://www.austlii.edu.au/au/legis/cth/consol_act/tpa1974149/s74f.html

It's not clear where the ACCC got their figure of ten years from.



This is a piano we're talking about, not an iPod. It cost not much shy
of $5000 seven years ago. I'd be surprised if a court found that it was
reasonable to cease supplying parts so soon.

One shouldn't have to go to a court.



No, one shouldn't, but the courts are the final arbiters, so it makes
sense to base one's actions (to the extent that they're not voluntary
actions) on what the courts would decide if asked.

Sylvia.
How has this gone from a simple knackered pot, that *is* freely available
from the manufacturer, and *is* very reasonably priced, to talk of court
cases, and forcing manufacturers to supply parts .... ??

Arfa
 
On Wed, 26 Aug 2009 18:54:38 -0700, Jeff Liebermann
<jeffl@cruzio.com>wrote:

On Wed, 26 Aug 2009 09:27:25 -0400, Meat Plow <meat@petitmorte.net
wrote:

On Wed, 26 Aug 2009 14:12:42 +1000, Sylvia Else
sylvia@not.at.this.address>wrote:

The sustaining pedal on my Yamaha electronic piano is become rather
flaky. Sometimes it doesn't sustain when pressed.

Which Yamaha model piano? Most Yamaha pedal mechanisms made in the
last 20 years have been optical, not mechanical. For example:
http://www.yamaha.com/yamahavgn/CDA/ContentDetail/ModelSeriesDetail.html?CNTID=5037157
"# Interference-free optical key, and pedal sensors"

http://www.yamaha.com/yamahavgn/CDA/ContentDetail/ModelSeriesDetailPF.html?CNTID=1379&CTID=202200&LGFL=Y
"Sustain and shift pedals are equipped with continuous-position
digital optical sensors"

So I disassembled the piano enough to get at the mechanism, (removed 12
screws, and 6 bolts), and was rather surprised to see that the business
end consists of a potentiometre.

Ummm... thanks for not calling it a rheostat.

I'm not really surprised that it's failing. In fact, the surprise is
that it's lasted so long. When a piano is played, the sustaining pedal
is in constant use. I can't help feeling potentiometres were never
designed with that kind of use in mind.

The design seems rather primitive.

Sylvia.

Probably just needs a good cleaning. I own an old Yamy pedal. Used it
with my Kawai keyboard for decades.

This FC-4 piano pedal?
http://www.amazon.com/Yamaha-FC4-Piano-Style-Pedal/dp/B0002F52EW

If so, I also have one. The one I've been using on my Korg DSS-1 has
lasted about 15 year so far. I haven't had to tear it apart yet, so I
don't know if it's optical or a pot.

However, I do have one problem with the FC-4. Despite the anti-slip
rubber tread on the bottom, it still manages to slip around the
carpet. I keep wanting to bolt it to a piece of plywood, but never
have bothered.
Yep the old FC4 piano sustain pedal. Probably just a pot seeing those
things have been around forever and work with some pretty basic
instruments.
 
On Thu, 27 Aug 2009 10:38:22 +0100, "Arfa Daily"
<arfa.daily@ntlworld.com>wrote:

"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:00dd0ebd$0$13128$c3e8da3@news.astraweb.com...
Trevor Wilson wrote:
"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:00072947$0$4282$c3e8da3@news.astraweb.com...
Sylvia Else wrote:
The sustaining pedal on my Yamaha electronic piano is become rather
flaky. Sometimes it doesn't sustain when pressed.

So I disassembled the piano enough to get at the mechanism, (removed 12
screws, and 6 bolts), and was rather surprised to see that the business
end consists of a potentiometre.

I'm not really surprised that it's failing. In fact, the surprise is
that it's lasted so long. When a piano is played, the sustaining pedal
is in constant use. I can't help feeling potentiometres were never
designed with that kind of use in mind.

The design seems rather primitive.

Sylvia.
At least Yamaha are willing to supply just the pot. I was expecting them
to want to supply a complete replacement pedal mechanism, at some
exorbitant price.

Spares guy described it as a "volume" pot for the sustaining pedal :)

None in stock here, though - order from Japan - takes 4 weeks.

So much for supporting their product.

**How old is it? Beyond 7 years (or is it 5 now?) they don't have to do
diddly about spare parts supply, if they don't want to.

From the ACCC web site

"What is ?reasonably available? will depend on the particular
circumstances, such as the nature of the product and its expected useful
life. There is no minimum period for a manufacturer or importer to provide
facilities and spare parts for repair. However, a manufacturer or importer
will remain liable for damages for up to 10 years if the failure to
provide repair facilities and parts is found to be unreasonable."

This is a piano we're talking about, not an iPod. It cost not much shy of
$5000 seven years ago. I'd be surprised if a court found that it was
reasonable to cease supplying parts so soon.

Just appreciate that
they can get you the right part in 4 weeks. I could tell you stories
about ather brands, whose products have only been on the market for less
than 2 years and the parts are NLA. Yamaha, IME, are one of the better
companies for spare parts support.

OTOH, let your fingers do the walking and look through the Farnell
cattle-dog. They have some very superior quality parts, which you may be
able coax into the right spot.

Maybe, though when I went through Farnell's site yesterday, and considered
the mechanical requirements, I couldn't find anything suitable.

Sylvia.

I don't get what the problem is here. The pot has done 7 years. It's
knackered. Ho hum. Yammy will supply a direct replacement that will do
probably another 7 years for just $25 shipped. That's less than 7c a week. I
appreciate that the piano cost $5k (Aus ??) initially, but at the end of the
day, it's not exactly a Steinway, is it ? You could pay that much for a top
end LCD TV or a mediocre plasma, and find that you couldn't get parts, or
that they were prohibitively expensive, as little as 2 years down the line.

You might even have just been unlucky to have your pot fail in 7 years. If
Yammy don't have it available anywhere in your country, needing to de-stock
it from Japan, that might suggest that there is little call for
replacements.

Personally, I wouldn't give myself the grief of trying to shoehorn an
alternative in, with no guarantee that it's going to perform as the original
did, when a direct manufacturer's replacement is available at what I think
is a very reasonable cost, and with a life expectancy of at least another 7
years. Half of that cost is probably shipping and handling anyway, so get
two whilst you're at it for probably not a lot more, then you'll be ready to
roll again in another seven years ... d;~}

Arfa
I'm surprised the pot needs replaced in the first place. Having one
myself for what seems like ages and having a sister who plays also and
owns a couple FC4 pedals that she has not had me work on.
 
William Sommerwerck wrote:
However, a manufacturer
or importer will remain liable for damages for up to 10 years if the
failure to provide repair facilities and parts is found to be
unreasonable."

That's interesting. Could you point to a reference?

http://www.accc.gov.au/content/index.phtml/itemId/716812

Ah. I keep forgetting that a large percentage of the people in this group
aren't Americans. US laws are somewhat different.
Ah yes, though Trevor is in Australia.

Sylvia.
 
Arfa Daily wrote:
"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:00124c02$0$19673$c3e8da3@news.astraweb.com...
William Sommerwerck wrote:
"What is ‘reasonably available’ will depend on the particular
circumstances, such as the nature of the product and its
expected useful life. There is no minimum period for a
manufacturer or importer to provide facilities and spare parts
for repair.
There used to be.


However, a manufacturer
or importer will remain liable for damages for up to 10 years if the
failure to provide repair facilities and parts is found to be
unreasonable."

That's interesting. Could you point to a reference?
http://www.accc.gov.au/content/index.phtml/itemId/716812

Search the page for "spare parts"

The obligation to provide spare parts arises from the Trade Practices Act

http://www.austlii.edu.au/au/legis/cth/consol_act/tpa1974149/s74f.html

It's not clear where the ACCC got their figure of ten years from.


This is a piano we're talking about, not an iPod. It cost not much shy
of $5000 seven years ago. I'd be surprised if a court found that it was
reasonable to cease supplying parts so soon.
One shouldn't have to go to a court.


No, one shouldn't, but the courts are the final arbiters, so it makes
sense to base one's actions (to the extent that they're not voluntary
actions) on what the courts would decide if asked.

Sylvia.

How has this gone from a simple knackered pot, that *is* freely available
from the manufacturer, and *is* very reasonably priced, to talk of court
cases, and forcing manufacturers to supply parts .... ??

Arfa
Such is the way of the Usenet.

Sylvia.
 
"Jeff Liebermann" <jeffl@cruzio.com> wrote in message
news:brrb95da7rjnmmnugbg7q4at73bjq8uge5@4ax.com...
On Thu, 27 Aug 2009 12:09:15 +1000, Sylvia Else
sylvia@not.at.this.address> wrote:

Ummm... thanks for not calling it a rheostat.

Why on Earth would I do that?

Because it really is a rheostat. Officially, if there are three wires
involved, it a potentiometer. If there are only two, it's rheostat.
Since my FC-4 has only two connection on the phone jack, it's a
rheostat. However, the internal variable resistors in the non-optical
pedal mechanisms I've seen, use 3 wires.
http://en.wikipedia.org/wiki/Potentiometer
Unfortunately, just about everyone uses these terms interchangeably.

It's the sustaining pedal on a 7 year old CLP-970. The sensor looks for
all the world like a pot.

http://music.yamaha.com/products/main.html?productId=109
Release data is Jan 1, 2000 which makes it at the bitter edge of when
Yamaha started using optical pedal mechanisms. It doesn't specify the
pedal mechanism, but only says "Half pedal effect (Right)" which makes
me wonder why they bothered to use a pot instead of two switches.

Fortunately, the CLP-970 is heavy enough to require two people to lift,
so there's no problem of its moving around.

Well, yeah. The pedals are part of the cabinet.

I'm rather surprised that you opted to get the original part from
Yamaha. Potentiometers are fairly generic and available. If you have
the old part, try to determine the taper (linear, log, audio, weird,
etc), and the value of the pot with an ohms-guesser. Also the shaft
type. Then go shopping online for a suitable replacement. If you
need help, do some measuring and supply a photo.

That is not my experience at all. Potentiometers fited to musical equipment
are far from generic, and you cannot buy most of them off the shelf.




Gareth.
 
"Arfa Daily" <arfa.daily@ntlworld.com> wrote in message
news:luslm.1306$uC1.1056@newsfe18.ams2...
"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:00dd0ebd$0$13128$c3e8da3@news.astraweb.com...
Trevor Wilson wrote:
"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:00072947$0$4282$c3e8da3@news.astraweb.com...
Sylvia Else wrote:
The sustaining pedal on my Yamaha electronic piano is become rather
flaky. Sometimes it doesn't sustain when pressed.

So I disassembled the piano enough to get at the mechanism, (removed
12 screws, and 6 bolts), and was rather surprised to see that the
business end consists of a potentiometre.

I'm not really surprised that it's failing. In fact, the surprise is
that it's lasted so long. When a piano is played, the sustaining pedal
is in constant use. I can't help feeling potentiometres were never
designed with that kind of use in mind.

The design seems rather primitive.

Sylvia.
At least Yamaha are willing to supply just the pot. I was expecting
them to want to supply a complete replacement pedal mechanism, at some
exorbitant price.

Spares guy described it as a "volume" pot for the sustaining pedal :)

None in stock here, though - order from Japan - takes 4 weeks.

So much for supporting their product.

**How old is it? Beyond 7 years (or is it 5 now?) they don't have to do
diddly about spare parts supply, if they don't want to.

From the ACCC web site

"What is 'reasonably available' will depend on the particular
circumstances, such as the nature of the product and its expected useful
life. There is no minimum period for a manufacturer or importer to
provide facilities and spare parts for repair. However, a manufacturer or
importer will remain liable for damages for up to 10 years if the failure
to provide repair facilities and parts is found to be unreasonable."

This is a piano we're talking about, not an iPod. It cost not much shy of
$5000 seven years ago. I'd be surprised if a court found that it was
reasonable to cease supplying parts so soon.

Just appreciate that
they can get you the right part in 4 weeks. I could tell you stories
about ather brands, whose products have only been on the market for less
than 2 years and the parts are NLA. Yamaha, IME, are one of the better
companies for spare parts support.

OTOH, let your fingers do the walking and look through the Farnell
cattle-dog. They have some very superior quality parts, which you may be
able coax into the right spot.

Maybe, though when I went through Farnell's site yesterday, and
considered the mechanical requirements, I couldn't find anything
suitable.

Sylvia.

I don't get what the problem is here. The pot has done 7 years. It's
knackered. Ho hum. Yammy will supply a direct replacement that will do
probably another 7 years for just $25 shipped. That's less than 7c a week.
I appreciate that the piano cost $5k (Aus ??) initially, but at the end of
the day, it's not exactly a Steinway, is it ? You could pay that much for
a top end LCD TV or a mediocre plasma, and find that you couldn't get
parts, or that they were prohibitively expensive, as little as 2 years
down the line.

You might even have just been unlucky to have your pot fail in 7 years. If
Yammy don't have it available anywhere in your country, needing to
de-stock it from Japan, that might suggest that there is little call for
replacements.

Personally, I wouldn't give myself the grief of trying to shoehorn an
alternative in, with no guarantee that it's going to perform as the
original did, when a direct manufacturer's replacement is available at
what I think is a very reasonable cost, and with a life expectancy of at
least another 7 years. Half of that cost is probably shipping and handling
anyway, so get two whilst you're at it for probably not a lot more, then
you'll be ready to roll again in another seven years ... d;~}

Arfa

I'm totally with Arfa on this one.
It is unlikely you will find a pot that will fit without having to bodge
some way of getting it to work somehow. However it is completely likely
that Yamaha will sell you the correct one which will fit and work perfectly
for 7 years, as you have discovered.

I'm not really sure why there is any debate on this matter, other than the
few weeks wait as the pot is not in stock.




Gareth.
 
On Wed, 26 Aug 2009 09:16:10 +0100, "Arfa Daily"
<arfa.daily@ntlworld.com> put finger to keyboard and composed:

"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:0006026c$0$4139$c3e8da3@news.astraweb.com...
The sustaining pedal on my Yamaha electronic piano is become rather flaky.
Sometimes it doesn't sustain when pressed.

So I disassembled the piano enough to get at the mechanism, (removed 12
screws, and 6 bolts), and was rather surprised to see that the business
end consists of a potentiometre.

I'm not really surprised that it's failing. In fact, the surprise is that
it's lasted so long. When a piano is played, the sustaining pedal is in
constant use. I can't help feeling potentiometres were never designed with
that kind of use in mind.

The design seems rather primitive.

Sylvia.

It's not unusual to find pots in such applications, and there are types
which are specifically designed to have very long mechanical lives. Using a
pot keeps the circuitry simple. As an alternative, many guitar effects
pedals use an optical arrangement instead, where a shaded or shaped
'shutter' mechanically connected to the pedal, passes between an LED and a
phototransistor or diode, the varying DC resistance of the device caused as
a result of this, serving as the equivalent of the varying resistance of
your pot.

Arfa
IIRC, I have two Yamaha service manuals, one for a piano (CP10) and
one for an organ (Electone). I believe the organ uses a noiseless
"optical pot", but I'll have to check the piano. Both instruments are
probably around 20-30 years old.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
 
On Thu, 27 Aug 2009 13:29:43 +1000, Sylvia Else
<sylvia@not.at.this.address> put finger to keyboard and composed:

Jeff Liebermann wrote:
On Thu, 27 Aug 2009 12:09:15 +1000, Sylvia Else
sylvia@not.at.this.address> wrote:

Ummm... thanks for not calling it a rheostat.
Why on Earth would I do that?

Because it really is a rheostat. Officially, if there are three wires
involved, it a potentiometer. If there are only two, it's rheostat.

It has three. Five volts on side. Zero on the other. Middling in the
middle. This presumably reduces its sensitivity to track wear.
Yamaha's YC-45D and YC-25D combo organs use optical sensors -- two
wires for a 14V bulb, and two for a CdS photocell. Strictly speaking,
you should measure the resistance of your pot, in the absence of
power, to be sure that your device is not some fancy optical gadget
that is simulating a mechanical pot. But it does sound like it may be
the latter, and for $25 you would probably only want to treat this as
an academic exercise to satisfy your curiosity.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
 
On Thu, 27 Aug 2009 14:14:30 +0100, "Arfa Daily"
<arfa.daily@ntlworld.com> put finger to keyboard and composed:

How has this gone from a simple knackered pot, that *is* freely available
from the manufacturer, and *is* very reasonably priced, to talk of court
cases, and forcing manufacturers to supply parts .... ??

Arfa
It's a corollary of Godwin's Law.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
 
Franc Zabkar wrote:
On Thu, 27 Aug 2009 13:29:43 +1000, Sylvia Else
sylvia@not.at.this.address> put finger to keyboard and composed:

Jeff Liebermann wrote:
On Thu, 27 Aug 2009 12:09:15 +1000, Sylvia Else
sylvia@not.at.this.address> wrote:

Ummm... thanks for not calling it a rheostat.
Why on Earth would I do that?
Because it really is a rheostat. Officially, if there are three wires
involved, it a potentiometer. If there are only two, it's rheostat.
It has three. Five volts on side. Zero on the other. Middling in the
middle. This presumably reduces its sensitivity to track wear.

Yamaha's YC-45D and YC-25D combo organs use optical sensors -- two
wires for a 14V bulb, and two for a CdS photocell. Strictly speaking,
you should measure the resistance of your pot, in the absence of
power, to be sure that your device is not some fancy optical gadget
that is simulating a mechanical pot. But it does sound like it may be
the latter, and for $25 you would probably only want to treat this as
an academic exercise to satisfy your curiosity.

- Franc Zabkar
I did measure the resistance without power. It showed as 10K.

Sylvia.
 
Franc Zabkar wrote:
On Thu, 27 Aug 2009 14:14:30 +0100, "Arfa Daily"
arfa.daily@ntlworld.com> put finger to keyboard and composed:

How has this gone from a simple knackered pot, that *is* freely available
from the manufacturer, and *is* very reasonably priced, to talk of court
cases, and forcing manufacturers to supply parts .... ??

Arfa

It's a corollary of Godwin's Law.

- Franc Zabkar
That would be 'Godwin's Lawyer' which states that the longer a usenet
thread runs, the more likely it is that one party will threaten another
with legal action.

;)

Ron
 
That would be 'Godwin's Lawyer' which states that the longer a usenet
thread runs, the more likely it is that one party will threaten another
with legal action.

Are the Nazis and Commies at it again? Oh wait! The Commies are really
Nazis in disguise! They just hate the other Nazis!!
Bwaaa Ha Ha Ha Haaaaaaaaaaa!!
 
On Aug 26, 12:12 am, Sylvia Else <syl...@not.at.this.address> wrote:
The sustaining pedal on my Yamaha electronic piano is become rather
flaky. Sometimes it doesn't sustain when pressed.

So I disassembled the piano enough to get at the mechanism, (removed 12
screws, and 6 bolts), and was rather surprised to see that the business
end consists of a potentiometre.

I'm not really surprised that it's failing. In fact, the surprise is
that it's lasted so long. When a piano is played, the sustaining pedal
is in constant use. I can't help feeling potentiometres were never
designed with that kind of use in mind.

The design seems rather primitive.

Sylvia.
I have three pedals on my General Music PRO-1 keyboard. Two are are
KORG brand and the other is something else but the same design. I
took one apart a few year ago to clean and, IIRC, it was a compression
design. They work perfectly, don't fail and I only paid about $25
each.
Cheers,
Roger
 
"Engineer" <junk2007@rogers.com> wrote in message
news:9816d4ca-8390-4342-a70e-11c4bd48f2db@m11g2000yqf.googlegroups.com...
On Aug 26, 12:12 am, Sylvia Else <syl...@not.at.this.address> wrote:
The sustaining pedal on my Yamaha electronic piano is become rather
flaky. Sometimes it doesn't sustain when pressed.

So I disassembled the piano enough to get at the mechanism, (removed 12
screws, and 6 bolts), and was rather surprised to see that the business
end consists of a potentiometre.

I'm not really surprised that it's failing. In fact, the surprise is
that it's lasted so long. When a piano is played, the sustaining pedal
is in constant use. I can't help feeling potentiometres were never
designed with that kind of use in mind.

The design seems rather primitive.

Sylvia.
I have three pedals on my General Music PRO-1 keyboard. Two are are
KORG brand and the other is something else but the same design. I
took one apart a few year ago to clean and, IIRC, it was a compression
design. They work perfectly, don't fail and I only paid about $25
each.
Cheers,
Roger

You got me there. What's a 'compression' design ?

Arfa
 
On Tue, 8 Sep 2009 01:56:48 +0100, "Arfa Daily"
<arfa.daily@ntlworld.com> put finger to keyboard and composed:

"Engineer" <junk2007@rogers.com> wrote in message

I have three pedals on my General Music PRO-1 keyboard. Two are are
KORG brand and the other is something else but the same design. I
took one apart a few year ago to clean and, IIRC, it was a compression
design. They work perfectly, don't fail and I only paid about $25
each.
Cheers,
Roger

You got me there. What's a 'compression' design ?

Arfa
Strain gauge??? Capacitive transducer???

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
 

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