Holes in sheet metal
Silke De Loore is building a concertina. For the frames the reeds will sit in, we're preparing a piece of sheet metal for electric discharge machining. This process allows for very precise dimensionality. An electrically charged wire runs close to the metal sheet. Tiny electric arcs abrade away the surface, creating a precisely controlled cut. In order for the wire to be threaded through the sheet, we're making all the necessary holes. We'll also engrave numbers so it's easier to keep track of all the pieces.
This is one of the frames after cutting.
Putting everything in place.
The finished piece: