On this episode of EDES 210, I was tasked with using the laser cutter to cut and engrave a press-fit box with finger joints.

To begin, I needed to measure the kerf of the Epilog Pro machine I wanted to use by printing out a a kerf box as per the instructions. After printing and breaking apart the kerf box, I determined the average kerf was ~0.00875″. I then proceeded to form the box outline with the provided tool, opting to generate between 3 and 4 joints depending on the edge.

My first print failed due to the laser being maladjusted on Thursday. It appeared to be cutting trapezoidal cross-sections of wood instead of rectangular. I expect the slight increase in the depth of the wood needing to be cut from this offset also contributed to poor penetration.

After confirming the printer was working properly by inspecting another student’s print on the weekend, I re-did my print. The pieces came out without too much pressure, and any protruding edges derived from cutting against the grain were removed easily as well. I assembled the box, and used 280 grit sandpaper (outside) to add a smooth finish as well as remove any small amounts of laser burn.

I placed my sheet into the re-use because there was a fair amount of space left.

This is technically the workbench I assembled the box on, cleared of shavings and tools put away.

COST:

2’x2′ sheet of plywood | $7.99/sheet: $7.99

sheet of sandpaper | $1.50/sheet:  $1.50

Machine rental | $50/hr: $50

TOTAL: $59.49