Design perfectly nested boxes using the free online tool Makercase.
Open the website www.makercase.com
No registration or action is needed.
Design with Makercase:
We are going to create a dice just using Makercase
[Tip: To create a correct regular dice the sum of opposite faces should be 7: 1 opposite to 6, 5 opposite to 2, 4 opposite of 3]
Vector cutting: you can set the thickness and the color for the cutting lines (we use thickness 0,01 mm and color blue #0000FF)
[Tip: we suggest you to set the line thickness at the end, because very thin lines can be difficult to visualize]
Text engraving: set the color to the desired color for raster engraving. We use #808080
Check “Convert Text to Vector Paths”
Laser cutting kerf: 0.1
This is the most important setting and is the also one of the concept this activity aims to explain.
“Kerf” is the material that the laser burns away while cutting. It depends from laser source wattage, the lenses used for the laser, the kind of material and its thickness.
We suggest to set 0,1 mm. From our tests in fact we noticed that a general value, common to most lasers and various material, is 0,2 mm.
We suggest to use “soft” materials, as poplar plywood. Acrylic/plexiglas will be difficult to join, and MDF or hard woods can require some pressure on the slots to be joined.
If you wish to expand the concept of laser cutting kerf, tolerances, going from 2D to 3D, you can experiment using different slight different settings to create boxes: 0,9, 1, 1,2 mm… the students can have an experience on how a small change in value can create different effects when working with interlocking parts.
Aim of this step is to create a box that contains the dice, with a perfect fit that won’t let the dice move but that is not to tight because the dice needs to be removed easily.
Students must think about the size and dimensions of the dice just created. Since the side measures 4 cm, we cannot create a container that has an internal size of 4 cm, as the dice will be constrained into it. We need to create a container that is slightly larger.
Changing the tab width changes the results of the box. A higher number of narrow tabs makes the box really difficult to open, while wider tabs make it easy to open if needed.
Tutor can ask the students their feedback on the ability to interlock 2-dimensional parts with different ease.
Students can design further cases that can be used as simple boxes, special containers, pen holders and so on.
This tutorial has been developed as part of the FabEdu project, co-financed by the Erasmus+ Programme of the European Union.
For more details contact firstname.lastname@example.org