The virtual Fretboard
In the menu Virtual Fret Dress the operator can not only determine how much should be cut off from each fret but also can set the fretboard radius and amount of fall-off suited for the instrument or player. One can see the height of each fret, respectively how high they will be after processing and where on the fretboard it would buzz because of frets being too high or too low. The first step would be to adjust the neck relief with help of the truss rod.
Processing
When all the parameters for processing are set, the plek operator takes off the strings and starts the processing procedure. Depending on what parameters were entered, the frets will be cut as well as the nut and on acoustic guitars the saddle. With the new generation of plek Machines (plek pro) the frets are cut, on its predecessor (plek station) the frets are ground. The fundamental concept as well as the control software are essentially the same ; with the same quality achieved the duration of the fretwork process on the "station" takes merely longer than on the "pro" and nut work has to be done by hand.
Plek'd!
When frets, nut, and saddle have been processed, the instrument is strung up and tuned. The final scan checks to see if the result corresponds with the set specifications. If that is the case, then in closing, the frets are polished to a high gloss finish.
Les Paul Standard plek'd
The plek process is explained and visualized in a pretty good video, recently published at the Gibson USA website
(--> Les Paul 2008 Standard / Media / Video).