QRS Music Technologies PMII, Installation Manual, Page: 10 / 52

Installa on Procedure
10
July 2013
Preparing the Key Solenoid Rail
In this chapter, we determine the throw of the key solenoid plunger in rela on to the piano ac on’s key ‐ tail travel.
We also walk through the process of key solenoid alignment with respect to the piano ac ons keytails. When this
chapter’s work has been done, the solenoid rail will have the proper rail height and plunger throw. The moun ng
brackets will be in place and ready for moun ng to the piano.
Tools needed include the 2 op onal rail support brackets a 11/32" nut driver,
two rail bracket moun ng screws, screwdriver, hacksaw, metal fi le, ruler and a pencil. The piano ac on is on your
workbench and the keys are facing away from you.
The Pianoma on Key Solenoid Rail is shipped assembled.
Its component parts are as follows:
Key Solenoid Plunger Throw...
Step 1 . To take advantage of PNOma on's best reproducing capabili es, it is essen al that the plung ‐
er throw is slightly greater than the keytail li .
Note the following measurements:
B . Measure the bo om of the keytail to the keybed at the KEYTAIL UP posi on.
A. Measure the bo om of the keytail to the keybed at the KEYTAIL DOWN posi on.
A
B
Keybed
Keyframe
Step 2. Take the key li measurement “C” above and add 1/16" to compensate for the felt plung ‐
er p. This is the measurement used to fi nd the rest posi on of the plunger.
B =___________
A=___________
B ‐ A(C)=__________
Plunger Throw = C + 1/16” ______________