CNC Candlesticks

These candlesticks were created as a demonstration piece exploring the possibilities of 2.5-axis CNC-milling. All three share a common profile, a 1” hexagon, creating a sense of unity among otherwise disparate shapes. The variation between the shapes come solely from connecting the hexagonal bases via different paths. 

I used HSMWorks for SolidWorks to create the tool paths for this piece. Dividing the cut into multiple passes, beginning with the largest and most robust tools allowed for the fastest total machining time while minimizing the risk of tool breakage. In industrial situations, tool usage costs must be balanced against the expense of longer machining times. 

Minimizing the number of times a piece needs to be re-arranged within a CNC machine reduces the total time (and therefore cost) of manufacturing, and also eliminates opportunities for error. These shapes were designed to be cut with only 2 part flips. 

The first side was machined inside a pocket, leaving a 1/4” wall surrounding the pieces. This pocket was filled with a wax that reinforces the walls, and prevents excessive work-piece vibration during subsequent machining. This technique allows the work-piece to be held in a simple vise. An additional benefit is that the same corner of the stock material can be used for the origin throughout, simplifying the set-up process. When machining is complete, the wax is simply melted and allowed to drain away.