Testing lasercut parameters

To test the Lasercutter me and Mathieu did a little test sheet that resume in a small design the possibilities of the laser, we then cut and engrave the design on different materials .

We prepared the test sheet with Inkscape and here's what it looks like before being process. To have a easy to cut file, we chose to use a tree colors technique because we didn't want the graphic elements to be as deep as the greyscales elements. So, for the bleu elements, you have to put your color editor on RBG and set the blue at 255. It's going to be a 255 of intensity for the greyscales. To have a good contrast in the rendering, you have to set the laser at the deepest point you want and let the greyscales do their job.

Plywood :

      Engraving settings :          Power : 100          Speed : 40          Frequency : 500

      Cutting settings :          Power : 100          Speed : 0,40          Frequency : 2000

MDF :

      Engraving settings :          Power : 90          Speed : 55          Frequency : 500

      Cutting settings :          Power : 100          Speed : 0,15          Frequency : 1000

Acrilyc :

      Engraving settings :          Power : 100          Speed : 65          Frequency : 2000

      Cutting settings :          Power : 100          Speed : 0,35          Frequency : 5000

Cork :

      Engraving settings :          Power : 80          Speed : 65          Frequency : 500

      Cutting settings :          Power : 100          Speed : 1,5          Frequency : 2000

Rubber :

      Engraving settings :          Power : 100          Speed : 16          Frequency : 1000

      Cutting settings :          Power : 100          Speed : 2,60          Frequency : 2000

+ we now have cute little demos for the lab to showoff the capabilities of the machine!

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Parametric Design

I made my parametric design on Fusion360, It's a simple hexagon that can fit other hexagon inside it, we can then create modular shape using multiple of them. So here is a step by step guide to how I made them. First thing I did was to create a sketch.



Next, I draw a polygon using the poygon function



One thing really cool that you can do with parametric software such as fusion360 is to create your own parameters, so I know I will be using carboard for my design, but thickness may vary, so I will set a parameter in my design so I can always change every things that depend on the material thickness. First, I need to open the change parameters function.



Then I add a parameter and give it the condition I want.



Now, if I ever need to change the thickness of my cardboad, instead of changing every concern dimension in my draw, I can come here and change this parameter.

Next, I will draw a rectangle in the midle of one of my side and give it 1.5 inch long / my thickness material * 2,



Now I want to do a circular patern on my rectangle to make a clone of this rectangle on everyside of my hexagone:



Finally, I'm gonna create a second rectangle under the first one that will act as the slot of my pressfit. one the rectangle is drawn, I will again make a circular patern.



All I have left to do is a extrusion, In this extrusion, I only need to select what I actually want to extract, so everything exept the inside part of the first rectangle.



And here we have it, easy peasy!