On the bench today is a custom chromatic dulcimer with an ebony fingerboard. The spruce soundboard has been stained and lightly distressed to add some character. I’m a character and so are my dulcimers. So it goes.
Many dulcimer makers fret the fingerboard early in the construction process. It is much easier to install the frets when the fingerboard is separate from the dulcimer; one can hammer or press the frets in without any thought of possibly crushing the dulcimer beneath them!
I know several dulcimer makers who get good results fretting the fingerboard before gluing it to the dulcimer but I prefer fretting the fingerboard after assembling the dulcimer and applying the finish.
Experience has shown me that applying the finish to a dulcimer sometimes results in slight movement of the soundboard and fingerboard. By fretting after applying the finish I can level and/or add relief to the fingerboard and have it come out exactly as I prefer it to be.
I use a scraper and a few sanding blocks to prepare the fingerboard for fretting. The scraps of wood lying on the dulcimer prevent bad, scary things from happening to the soundboard while working on the fingerboard.
The movement of the fingerboard and the correction I am talking about is measured in thousandths of an inch. As a player I find these small increments can make a surprising difference in how much I enjoy playing a dulcimer.
Fretting towards the end of a build requires more work but I am often told my dulcimers are very comfortable and easy to play and this is a part of how I make them that way.