Shift Pedal Calibration
Shift pedal calibration (SPCAL) tells the Spirio how far the shift solenoid is traveling (actuate distance). It's important to run the calibration during every service visit and SPCAL must be run every time the keyframe shift screw is adjusted.
Preliminary Steps
Make sure the keyframe shift stop screw is properly regulated so that the hammers miss the left string in the tri-chord section when the left pedal is depressed.
To make sure that the keyframe is resting on the keyframe rest block, lower the left pedal rod nut so that the iron shift lever is not contacting the keyframe.
Adjusting Shift Pedal Solenoid
1. Adjust the shift pedal solenoid black pusher tip so that the keyframe just barely begins to leave the keyframe rest block. There should be no visible gap between keyframe and rest block, but a piece of paper could be pulled free without ripping.
Check for immediate resistance by pulling down on the actuate-stop disk. There should be no lost motion.
Note: There will be no gap between the white felt on the release-stop disk and the solenoid housing when the solenoid is at rest.
2. Run SPCAL command: press and release MODE, then press and release LEFT arrow, in quick succesion (MODE/LEFT).
3. The yellow LED on the sensor/status panel will illuminate as the command loads. After about 10 seconds, the solenoid will travel slowly from its rest position to its fully-actuated position and back again as it measures its travel. The yellow LED on the sensor/status panel will then flash for a few seconds as the measured positions are stored in memory. The solenoid will then travel to its fully-actuated position and hold in this position, producing the maximum shift of the keyboard. At this time the green LED on the sensor/status panel will stay illuminated.
3. When the solenoid is fully actuated there needs be about ½ mm of lost motion between the keyframe and the keyframe shift screw. To verify, press on the left pedal and look for ½ mm of movement.
If there too much or too little free play the solenoid release stop disk will need to be adjusted accordingly.
4. Press Enter on the remote control. The solenoid will gently return to the rest position, and Spirio will resume normal operation.
If the free play was correct then shift pedal solenoid calibration is complete. If not, continue to Step 5.
5. To adjust the shift pedal solenoid release stop disk, use two ½ inch wrenches to loosen the lock nut adjacent to the stop disk and turn the stop disk clockwise to decrease actuate distance or counterclockwise to increase actuate distance. Tighten lock nut after adjusting stop disk.
6. Reset the solenoid pusher tip to the correct position as in Step 1 and follow Steps 1-4.
FINAL STEP: Adjust the shift pedal rod nuts so that there is about 1 mm of lost motion between the top rod nut and the felt pad on the iron shift lever. This will prevent noise from occurring when the iron shift lever returns to rest after being actuated by the solenoid. The lost motion should be adjusted such that a pianist will not notice it.
Notes: SPCAL must be re-run after each adjustment to the keyframe shift screw.
SPCAL must be re-run after each adjustment to the release stop disk position. This is necessary to ensure that the pedal positions measured by SPCAL and stored in memory are in exact agreement with the actual mechanical adjustment. If SPCAL is not re-run after adjusting the release stop disk, the pedaling will be incorrect.
SPCAL Utility may fail if the actuate distance is 6 mm or more. If such a failure occurs, the red LED on the sensor/status panel will illuminate and the system will remain inoperable until it has been power cycled. Shut off the power and reduce the solenoid travel (by rotating the release stop disk clockwise) before restarting SPCAL.