3. Computer Controlled Cutting¶
This week, we’re delving into computer-controlled cutting, an essential part of digital fabrication. We’ll explore parametric 3D modeling, laser cutter operation, and vinyl cutting techniques. By engaging with these tools, we aim to create and assess parametric construction kits while mastering the principles of computer-controlled cutting.
Learning Outcomes:
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Demonstrate and describe parametric 2D modeling processes.
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Identify and explain processes involved in using the laser cutter.
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Develop, evaluate, and construct a parametric construction kit.
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Identify and explain processes involved in using the vinyl cutter.
Group Assignment:¶
In our recent group assignment, we embarked on a comprehensive exploration of our laser cutting machine’s capabilities. We conducted various tests to characterize its focus, power, speed, rate, kerf, joint clearance, and types.
One of the key tests involved creating a 4x4 grid of squares, each outlined with a different color from the Trotec laser’s palette. We meticulously adjusted the power and speed settings for each color, ranging from 100% to 70% power and from 0.1m/s to 0.7m/s speed increments.
Furthermore, we employed a kerf and joint clearance test using MDF material of 3.3mm thickness. By generating comb-like structures with varying slot thicknesses, we determined the optimal fit for our material, which greatly informed our laser cutting processes.
For a detailed account of our experiments and findings, please visit the group assignment page on our website.
Individual Assignemnt: Parametric Construction Kit Project¶
Molecular Geometry Kit
Inspiration:¶
My inspiration stemmed from recognizing the challenges students face in visualizing molecular structures in chemistry classes. I wanted to find a way to make learning about molecules more hands-on and engaging. Seeing the need for a practical solution, I was inspired to create a kit that could help students grasp complex concepts more easily.
I found a reasearch paper which recognozied the benefits of utilizing a construction kit for molecular chemistry in teaching this concept and helping the students to grasp the idea. Here is the research paper.
The research paper highlited how understanding molecular geometry is crucial in chemistry, but it can be tricky to visualize. So it was important to bridge the gap between 2D diagrams and 3D structures by creating a tangible kit that students can interact with. Which would provide a hands-on experience, aiming to make learning molecular geometry more intuitive and enjoyable.
Who is it for?¶
The molecular geometry kit is designed for chemistry students at various levels, from high school to university. It’s also useful for educators looking for innovative teaching tools to enhance their lessons. By offering a practical way to explore molecular shapes, the kit aims to support students in mastering key concepts and developing a deeper understanding of chemistry.
Prametric Deisgn Process¶
For me, parametric design is all about creating a system where various elements of the kit can be adjusted based on specific parameters. It’s like setting rules that guide how the kit comes together.
Parameters and Variables:¶
I delved into identifying the key parameters that define molecular structures, such as bond angles, bond lengths, and atom types. These parameters serve as the building blocks for the design, allowing for flexibility and customization.
Through parametric design, I ensured that the kit could adapt to different molecular geometries commonly encountered in chemistry. By tweaking the parameters, users can explore various configurations and gain a deeper understanding of molecular structures.
Design Program:¶
Drawing on my prior experience with Fusion 360, I chose it as the platform for creating the molecular geometry kit. Fusion 360’s interface and tools have been a familiar environment for me, offering a powerful platform for parametric design.
I utilized Fusion 360’s user parameter functionality to establish a flexible framework for the molecular structures. By defining parameters for bond angles, bond lengths, and atom types, I empowered users to customize and explore different configurations.
Fusion 360’s parametric capabilities provided a dynamic environment for exploring flexibility and customization. Users can easily adjust parameters and observe real-time changes, facilitating experimentation and learning.
By leveraging Fusion 360’s capabilities, I aimed to empower users to creatively explore molecular geometry concepts. The interactive nature of parametric design fosters a deeper understanding and engagement with chemistry principles.
Laser Cutting Process¶
After finalizing the design in Fusion 360, I exported the model as DXF files. This format ensures compatibility with most laser cutting software and machines. It captures all the necessary geometric information, including cuts, folds, and engraving details.
Material Selection and Thickness:¶
For the molecular geometry kit, I opted for 5.3 mm acrylic sheets in various colors. Acrylic is durable, lightweight, and offers excellent clarity, making it ideal for visualizing molecular structures. The 5.3 mm thickness provides stability and durability to the assembled models.
Cutting Process:¶
With the DXF files ready, I prepared the laser cutter by setting up the appropriate parameters for cutting acrylic. This included adjusting the laser power, speed, and focus to ensure clean and precise cuts.
The laser cutter meticulously followed the paths defined in the DXF files, effortlessly slicing through the acrylic sheets with precision. However, one challenge I encountered was optimizing cutting speeds and power levels to achieve clean edges without causing excessive melting or charring of the acrylic.
Saftey Measures and Precautions:¶
Safety is paramount when operating a laser cutter. I ensured that the cutting area was well-ventilated to disperse any fumes generated during the cutting process. Additionally, I wore appropriate personal protective equipment.
By following these steps and taking necessary precautions, I successfully transformed digital designs into tangible molecular models, ready to enhance the learning experience for students and enthusiasts alike.
Results:¶
After meticulous design and laser cutting processes, the final parametric construction kit design emerged, ready to enrich the exploration of molecular geometry. The kit comprises diverse molecular structures, each customizable through user-defined parameters.
The parametric construction kit features a range of molecular structures, including linear, trigonal planar, tetrahedral, octahedral, and more. Each component is designed to interlock seamlessly, facilitating versatile assembly and configuration.
Conclusion:¶
In conclusion, the parametric construction kit represents a significant tool used in bridging the gap between theoretical concepts and hands-on learning in molecular geometry. By leveraging parametric design principles and laser cutting technology, I’ve created a dynamic tool for educators, students, and enthusiasts alike.
The project underscores the power of parametric design in fostering creativity, exploration, and comprehension in STEM education. Through Fusion 360’s intuitive interface and robust features, I’ve crafted a versatile kit that encourages interactive learning and experimentation.
Looking ahead, I envision ongoing enhancements and iterations to further enrich the parametric construction kit. Future developments may include expanding the range of molecular structures, integrating interactive digital components, and exploring interdisciplinary applications in chemistry, physics, and beyond.
Utilizing a Roland Vinyl Cutter: Cutting a Custom Logo:¶
I’ll outline my experience using a Roland vinyl cutter to fabricate a custom logo derived from the top view of a nested polyhedron.
Roland Vinyl Cutter:¶
As I started using the Roland vinyl cutter, I was fascinated by its technology and what it could do. I explored how it cuts materials with precision and handles different types of vinyl.
I did not spend much time understanding how the Roland vinyl cutter operates, as its simple and easy to operate. But at the same time allows for many different possibilities.
Logo Design:¶
Finding Inspiration in Geometric Shapes The logo’s genesis stemmed from the allure of geometric shapes, particularly the nested polyhedron’s intricate structure. The polyhedron’s symmetry and complexity inspired the logo’s design, aiming to capture both elegance and mathematical precision.
In the quest to materialize the concept, SketchUp served as the platform for crafting the nested polyhedron model, providing a three-dimensional canvas to refine its form. Transitioning to Inkscape, I meticulously extracted the top view of the polyhedron, setting the stage for further digital manipulation.
Setup and Cutting:¶
Loading the vinyl material into the Roland vinyl cutter was a straightforward process. Using Roland Cut Studio software, I defined the cutting parameters and uploaded the design. The vinyl cutter efficiently translated the digital design into precise cuts, delivering high-quality results.
Result:¶
Once the vinyl-cut logo was ready, I eagerly applied it to my laptop, aiming to add a touch of personal flair to my device. Using paper tape, I carefully lifted the design from its backing, ensuring no intricate details were lost in the process.
With the logo now secured on the paper tape, I meticulously positioned it on my laptop, paying close attention to alignment and placement. Employing tweezers, I delicately removed any unwanted pieces, ensuring the logo adhered seamlessly to the laptop’s surface.
