Week 03

Computer-controlled Cutting

February 9 2022

About the Class

In his global class, Neill expanded on the content of the local class, which introduced us to the Trotec 400 laser cutter and the Roland CAMM vinyl cutter. This included preparation of files for the two machines, pre-print routines and mechanical aspects, such as safety measures and material considerations.

Building a lighting edge sign

For my personal homework project, I decided to build a glowing edge light sign. It features a box, housing a LED strip and power supply, together with an engraved sheet of acrylic. By lighting the acrylic sheet from below, the engraved motive on the acrylic plate appears to be glowing. Using the Trotec 400 laser cutter, I manufactured the press-fit parametric box from 2,5mm MDF plates. As the time slots were heavily compressed when using the laser cutter, the acrylic sign was not manufactured on that day. Instead, I cut the acrylic sign in the subsequent week. For time reasons, I omitted the Grasshopper-generated background design on the sign.

Parametric design file in Fusion 360.

Building steps of assembling the laser-cut pieces, integrating ESP32, programming LED strip.

Experimenting with Grasshopper to produce an organic generative design.

Finding a perspective to export to SVG.

Designing the glowing sign in Illustrator to be engraved in acrylic.

Engraving the acrylic plate in the small Trotec 100.

The final assembled light edge sign.

Further Links

tools
knife
Roland Zund Othercutter ultrasonic
print and cut
Roland
laser
Epilog Universal Trotec GCC
Full Spectrum Lasersaur
3D FabLight Oxford PHAROS
plasma
Forest Scientific Torchmate
waterjet
OMAX Flow WAZER
hot wire
FROGWire Hotwire MTM
wire EDM
Sodick MTM

CAD
Inkscape extensions video
Rhino Grasshopper video
Blender Sverchok geometry nodes
FreeCAD Sketcher LCInterlocking video
Fusion 360 Slicer
SolidWorks xDesign
Onshape Kiri:Moto
Cuttle Kyub Pepakura VisiCut flatfab ExactFlat

CAM
  printer drivers
Inkcut Deepnest
mods community project video

vinylcutter
applications
     signs
thermal transfer
     pop-up cards, books
origami, kirigami
     screen printing
     sandblasting
     flex, multi-layer circuits
     wiring harnesses
     antennas
materials
knives
     vinyl
     masking tape
     transfer adhesive
     copper
     epoxy film
     sandblast stencil
settings
     force
     speed
     cut depth
     temperature, humidity, ...
rollers, feeding
weeding
     adhesion
     lift vs shear

lasercutter
applications
     marking, engraving
        raster
vector
     screen printing
halftone holes path app
     press-fit construction
joints.FCStd joints.png
GIK GIK.FCStd video
        types
        clearance
        stress concentration
        parametric design
        parameter testing
living hinges, flexures, mechanisms
MEMS
Light Amplification by Stimulated Emission of Radiation
     state diagram
     population inversion
     gain medium
     lasing threshold
     output coupling
     beam mode, profile, waist
     diffraction limit
gain medium
     lifetime
     CO2 (10.6 μm)
     fiber (1-2 μm)
     InGaAsP (1-2 μm)
     AlGaAs (600-900 nm)
     Nd:YAG (1064, 532 nm)
     Ti:sapphire (650-1100 nm)
     excimer (100-300 nm)
cutting mechanisms
     burning
     melting
     evaporation
     ablation
     passes
airflow
     assist
     exhaust
     filter
kerf
safety
classes
     venting
     airflow
     outgassing
     cleaning optics
     supervision
     fires
materials
cardboard
        Edge Crush Test (ECT) 44
        orientation
wood custom
PMMA/acrylic/plexiglass/perspex/lucite glue bend fold
POM/delrin/acetal
     fabric
pasta
     PVC flame test
     [polycarbonate]
     [metal] CerMark gypsum
settings
     focus
     power
     speed
     rate
     coordinate system, origin
     vector, raster

assignment
group assignment:
     characterize your lasercutter's focus, power, speed, rate,
        kerf, joint clearance and types
individual assignment:
     cut something on the vinylcutter
     design, lasercut, and document a parametric construction kit,
        accounting for the lasercutter kerf,
        which can be assembled in multiple ways,
        and for extra credit include elements that aren't flat