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3. Computer-Controlled Cutting

This weeks goal was to use computer-controlled cutting to design and cut a parametric construction kit, according to our group assignement this week, and to produce an additional vinyl-cut object.

Parametric Design - Autodesk Fusion

In our group assignement we analyzed the lasercutter’s Kerf. In order to achieve accurate results the width of the lasercutters beam (wich is called kerf) has to be considered. Our Lasercutter Epilog Zing 40 “Bazinga” has a Kerf of 0,0795 mm. Feel free to check out our HRW Group Website !

I designed a segment, which can be used for building objects. Each segment has 3 ways to be assembled, leading to different types of construction.

As almost any project, I started with creating a sketch in Autodesk Fusion.

I have not linked the parameter-menu to a shortcut yet, but I thought it would be useful for this and following projects.

I started with defining my parameters. They can be edited at any time later.

I drew a rectangle with a and b as length and width.

The joint is defined with the parameters aa and bb.

To ensure that the notch always remains centered, I specified the distance as a function of the parameters. I changed it later, but for now its (b/2)-(aa/2).

Then I drew one notch on each side with the same procedure.

And on the bottom as well.

I changed the distance formula on the top, because I recognized a mix-up.

Then I changed the parameter aa for the tab to 4 mm.


Then I started adding the kerf.

The alignment formula has to be changed as displayed on the screenshot.

I copied the changes to every notch.

To avoid some boring screenshots, this is my result.

I exported the sketch as DXF for the lasercutter.

Preparing the file for lasercutting with Inkscape

I imported my dxf to Inkscape.

Everything looks good (I always check my files after importing). I changed the stroke thickness to hairline.

To save some material, I started with smaller dimensions and only 4 segments.

These are the dimensions later.

And my original lasercut svg.

Lascercutting with Epilog Zing 40

I imported my svg to the “Bazinga” computer.
And opened it in VisiCut.

I used this settings and checked the lens was clean and everything ready to cut.

The focus can be checked with this tool.

I started the lasercutter.

I was happy with my result.

So I started cutting in real dimensions.

The finished kit could look like this.

Engraving with XTool F1 Ultra

I designed a shape by using the parametric curve function of Inkscape. But first, I started with a rectacle.

Then I opened the built-in plugin menu “parametric curves”.

This is the result. It is a good and quick option for designing fancy shapes.

Then I imported the svg into XTool Studio.

..

Vinyl-cut sticker

I downloaded our FabLab Logo here and imported it to Inkscape.

And uploaded it to Cricut Design Space.

This is the general overview.

First I had to merge the 3 segments.

Otherwise it would look like this.

I set the material to vinyl.

And the file has been sent to the cutter.

I placed a 10 cm rectangle of black vinyl on the base plate and fixed it with additional tape.

I loaded the plate in.

Then I started the cutting.

I removed the excess.

And used transfer foil to apply it on my laptop.

For good results I always make sure the transfer foil sticks well enough.

Then I applied it.

This is the result.

Downloads

lasercut.svg
engrave.svg
vinylcut.svg