Solenoid Controller Setup
The Solenoid Controller Setup functions are intented to be used by qualified installer technician only.
Here is a description of the functions:
Ca
: Calibration advanced - this function is very important to achieve the best possible playback and
has to be performed by the installer technician!
Ca
will adjust the expression levels for each key solenoid, tests if each
solenoid is performing correctly and performs an analysys before auto-
matically storing the information.
Ca
is the highest calibration level and
depending on the firmware version it can take 45-90 minutes. During
calibration the lid of the piano should be open and a quiet enviroment
is necessary.
To start the advenced calibration press the YES button while the display shows:
Ca:Calibration advanced
Cq:
Calibration quick - this is a faster but less detailed calibration.
An:
Analyse of calibration - this function can be used to review the calibration result. By pressing YES
the system performs a calibration test and displays the result.
Ck:
Key Calibration - allowing single key calibration. When pressing YES Kxx will be displayed.
(xx) indicating the key number). Pressing the Forward or Rewind buttons any of the keys between
K05-K84 can be selected. Once the key is selected, pressing the YES button will start calibrating the
selected key.
HC:
Key Hold Force - allows to set the optimal key solenoid hold force. Piano actions, key weights are
different on each piano. It is important to select the best Key Hold Force value for the particular piano.
Available value ranges from 0-99. Pressing the and - buttons will increase or lower the force.
If the hold force is too low, the piano will play short (staccato) notes even if it was recorded as a long
(legato) one. Adjust the hold force level and listen carefully triggering several keys accross the
keyboard. Keys can be selected by pressing the Forward or rewind buttons. The default value is set
to 6. By our experience Key Hold Force level 6 is optimal for most small to mid size grand pianos.
RC:
Key Release Force - controls how fast the plunger returns to the rest position. This is another
very important parameter to set to the optimal value. Available value ranges from 0-99. The lower the
value, the faster the plunger returns to its rest position. This will allow the solenoid to “fire” faster
resulting better note repetition. Higher value slows down the plunger return, resulting quieter
plunger movement, but decreasing repetition rate. Select different values testing several keys
accross the keyboard. Listen to a piano piece you know very well, especially with fast repeating
notes. Select the optimal release value. Factory setting is 13.
SC:
Sustain Force - adjusts the force of the pedal solenoid. The Susutain Force is not calibrated
automatically. It is important to select a value that will lift the damper rail without delay
and at the minimum mechanical noise. Pressing YES will display the current force level. Pressing
the and - buttons will increase or decrease the solenoid force. It is important that all
trapwork related mechanical adjustments are correct (loss motion, solenoid travel, susutain lever)
before the SC value is selected. The default setting is 23. Once the optimal value is established, it is
recomended 2 digits. During extended playback the solenoid heats up and needs
additional power to perform correctly.
WARNING! These functions should only be used by certified
Kohler technician !
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Summary of Contents for KD-7
Page 1: ...KOHLER KD 7 User Guide ...