Parametric laser cutting grid (from recycled prints)
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This parametric cutting grid for laser cutters helps prevent flashback on materials such as acrylic.
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Problem:
Small marks are left on the backside of a laser cutted part when you cut materials directly on the metal honeycomb of a laser cutter. This problem called ‘flashback’ is especially visible on acrylic. A simple solution is to lift the part of the table with a sacrificial grid. Many laser cutter suppliers provide this as an accessory, but we designed a flexible and sustainable variant ourselves for our local fablab.
Here you can see how the acrylic is lifted from the metal honeycomb that would otherwise reflect on the backside.
Materials needed:
It can be made out of a wide variety of materials such as wood and acrylic, but we instead opted to use sheets of PLA made from recycled 3D prints (Fablab Arnhem collects failed/obsolete prints from visitors and companies in the region to recycle this into new materials).
An example grid of 460x230mm is provided as a nested ‘.dxf’ file which can be cut from a sheet of approximately 485 x 280 x 3 mm (this is exactly the size or our sheet press and uses around 500 grams of material). When the cutting grid is ‘damaged’ too much, we can simply shred it again (see pictures).
*The design is fully parametric and can be changed in Fusion 360, but I can also provide some other common dimensions on request.