Message
Re: [disklavier] Re: solenoid clipping
2012-06-10 by athomik
athomik
On Jun 9 2012, Charles Muller Jr wrote:
>Hi Carol,
>I need some help. My wonderful Disklavier (Model DA1 II updated to a Mark
>II XG using the DKC 500RXG Control Unit and PC card substitution within the
>MAINS unit) has fallen asleep and won't wake up. Actually what happens,
>when I depress the Standby/On switch on the front panel of the Control Unit
>nothing lights up, no functions work, however, I do hear a relay activate
>within the MAINS unit. When I depress the switch again I hear a louder
>noise (deactivating the relay?).
>
>My Mark IIXG manuals discuss a battery within the system that is soldered
>in place and should be replaced by a Disklavier Technician. The manual
>does not say where this battery (which lasts about 5 years) is located. Is
>the solution to my problem simply a battery replacement? That would be
>great! Do you have any idea the size and type of the battery and where
>it's located?
>
>Regards,
>Chuck Muller
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>On Tue, Feb 21, 2012 at 1:21 PM, Robert 69 wrote:
>
>> **
>>
>>
>> Hi Robert,
>>
>> Please pay attention to my protocol it works very well if followed:
>>
>>
>> I have worked with the Mkll Disckavier since it came out. Wayne Stahnke
>> was involved with the design of this system and several of his patents are
>> utilized in the system. What I found really makes the MKll perform at its
>> very best is the precise adjustment of each hammer sensor for the exact
>> point of let-off. The damper timing is also very important also. I have
>> verified this with Wayne himself and he respects my expertise. You have to
>> understand this is a true reproducing piano and the sensors must be set
>> exactly in order to get optimal performance when you run the Keyboard
>> Measurement program that builds the expression tables that will determine
>> the dynamic range the piano will operate at. Most people think the Keyboard
>> Measurement is the fix all and adjusts the player to the action.
>> >
>>
>> The secret is to use the sensor rail as your let off rail. Set it for 2 mm
>> and regulate the let off on each note so it beeps just as the jack leaves
>> the knuckle not to long not to short and check that the drop is not so
>> high that the sensor is tripped again at full dip.
>>
>> This is the sequence: As you slowily raise the hammer there will be 2
>> beeps, the first one is the the switch on signal the 2nd one is the let off
>> signal. You have to hold and slowly move the key so you can hear and see
>> the how long or short the point of let off beep is. It cannot be too long
>> or too short just an exact Bleep as the Jack leaves the Knukle. The drop
>> cannot be too high so as to not trigger the let off signal at full dip as
>> well as too low that would trigger the turn on signal. It is important to
>> check this.
>>
>> Keep the hammers form checking too low as well.
>>
>> If this is done properly there should be no note clipping. Of course the
>> rep springs can't be too strong.
>>
>> The dampers need to start lifting around 2 mm of dip and the key sensor
>> has to be adjusted to start beeping just as the damper starts to lift.
>>
>> All this careful adjustment allows the Key Measurement program to really
>> setup good expression tables.
>>
>> Every Mkll that I have gone out to work on for the first time at least has
>> never been setup and calibrated. Sure they seemed to play pretty good but
>> when I checked the Key sensing and Hammer sensing as well as the pedal
>> adjustment it was no where close to right.
>>
>> I always use Live Performance Disc's because they are the base line with
>> the greatest dynamic range.
>>
>> I have always been able to get a low level of play at the 0 setting.
>>
>> Hammers can be voiced softer by using 70% Isopropal Alcohol on the
>> hammers. Many times the hammers are so hard that the piano is so bright it
>> is even hard to tune.
>>
>> I hope this sheds some light on the MKll, MKll XG And MKlll Loudness
>> problem.
>>
>> Robert Turner
>> 205 559 3485
>> ------------------------------
>> *From:* robertm
>> *To:* disklavier@yahoogroups.com
>> *Sent:* Friday, February 17, 2012 11:39 AM
>> *Subject:* [disklavier] Re: solenoid clipping
>>
>>
>>
>> Thank you for all your replies, this helps me understand the issues
>> regarding my Disklavier better. I had abandoned trying to get this resolved
>> long ago, but now more fully understand. I will get the floppy replaced and
>> will probably set up a laptop with MAXMSP to drive MIDI for future
>> recordings.
>>
>>
>> Carol--the problem with the cutoff effect was present even when the pedal
>> was not used.
>>
>> My piano technician has checked the regulation and has indicated that the
>> piano was in fairly good shape (regulation probably not needed). I had it
>> done about 10 years ago, but since the bushings are pretty worn he has
>> taken the action and will rework everything including the regulation
>> (arrrgh--I'm without my C7 for three weeks!! All I have to practice on is a
>> digital!)
>>
>> Robert Morrison
>>
>>
>>
>>
>>
>