QRS Music Technologies PMII Installation Manual - Installa On Procedure
Installa on Procedure
17
July 2013
...Cu ng the Keybed Slot
Taking into account any varia ons in the contour of the front of the piano and using the frame square aligned with the
mark just made on the front underside of the keybed, measure and mark the depth measurement on the underside of
the keybed. Next, measure 1/4" toward the front of the piano scribing a straight line between the bass and treble
notes. Then measure 1‐3/4" toward the rear of the piano from the newly scribed line. Whenever possible we recom‐
mend keeping in the breaks.
Each slot should be at least 1‐3/4" wide (2” Maximum). The longitudinal center of each slot must correspond to the
center line of the felt padded key tails, which is 1/2" in from the end of each key.
Verify the marks just made. Drill a small exploratory hole within each slot and compare the posi on of the slot with the
marks made inside the case. Correct each slot posi on as required.
Using a 1‐3/4" Forstner bit, drill holes centered at the ends of each slot.
Cut the lengths of each slot with a sabre saw, circular saw or router (being extremely careful with all power tools), con‐
nec ng the end holes just made. Avoid cu ng away the breaks between the slots if possible.
Rasp or sand the slots smooth and square with the surface of the keybed. Bevel the top most slot edges with coarse
sand paper. The slots should be sealed with paint matching the bo om of the piano, or a clear sealant to retard drying
of the wood.
At this point the slots have been posi oned and cut. Now is the me to remount the So Shi Lever.
Side View of Modified Keyframe and Keybed