The popular 3D printer benchmark and test model, #3DBenchy, designed by Creative Tools, is now in the public domain. After ten years of copyright protection, anyone can freely use, modify, and distribute the Benchy model without restriction. This change opens up new possibilities for its use in education, research, and commercial projects. Creative Tools encourages continued community involvement and development around the Benchy model.
This video tests the adhesion of various glues on PETG 3D printed parts. The creator bonds two PETG cubes with each adhesive, lets them cure, and then attempts to break the bond using a calibrated force gauge. Tested adhesives include super glue, epoxy, UV cure resin, and various specialized plastic glues. The video documents the force required to break each bond and declares a winner based on highest break strength.
The Hacker News comments on the PETG adhesive test video largely discuss the efficacy of different adhesives for PETG, comparing the results shown in the video with their own experiences. Cyanoacrylate (super glue) is generally agreed to be unsuitable, while specialized PETG glues or more general-purpose plastics adhesives like MEK are favored. Some commenters debate the merits of different brands and application techniques, emphasizing the importance of surface preparation and clamping. Others offer alternative joining methods like solvent welding or mechanical fasteners, particularly for structural applications. A few comments also touch upon the video's production quality and presentation style, with some finding it overly long.
Laser Metal Deposition (LMD), a metal 3D printing technique, offers a less wasteful alternative to traditional powder bed fusion methods. Instead of using a powder bed, LMD precisely deposits metal powder directly into the laser's focal point, melting it onto the build platform layer by layer. This targeted approach significantly reduces material waste, particularly beneficial for expensive metals like titanium. Additionally, LMD allows for building onto existing structures, enabling repairs and hybrid manufacturing processes. While potentially slower than powder bed fusion for some geometries, its reduced material consumption and repair capabilities make it a promising technique for various applications.
HN commenters generally express interest in LMD (Laser Metal Deposition), particularly its potential for repair and hybrid manufacturing. Several highlight the advantages over powder bed fusion methods, like reduced material waste and the ability to create larger parts. Some question the "new" claim, pointing to existing directed energy deposition (DED) techniques. Others discuss specific aspects, such as the challenges of controlling the melt pool and achieving precise geometries, the need for skilled operators, and the potential impact on different industries. A few users note the lack of specifics in the original article, like deposition rates and materials used, and desire more technical detail. Finally, comparisons are made to other additive manufacturing processes like WAAM (Wire Arc Additive Manufacturing).
Researchers at the University of Toronto have combined machine learning and two-photon lithography, a type of nano-3D printing, to create ultra-strong and lightweight materials. By training a machine learning algorithm on a dataset of nano-architectures and their corresponding mechanical properties, the team could predict the performance of new designs and optimize for desired characteristics like strength and density. This approach allowed them to fabricate nano-scale structures with exceptional strength-to-weight ratios, comparable to steel but as light as foam, opening up possibilities for applications in aerospace, biomedicine, and other fields.
HN commenters express skepticism about the "strong as steel" claim, pointing out the lack of specific strength values and the likely brittleness of the material. Several discuss the challenges of scaling this type of nanomanufacturing and the high cost associated with it. Some express interest in seeing more data and rigorous testing, while others question the practical applications given the current limitations. The hype surrounding nanomaterials and 3D printing is also a recurring theme, with some commenters drawing parallels to previous over-promising technologies. Finally, there's discussion about the potential for machine learning in materials science and the novelty of the research approach.
A Hacker News user is offering to create and physically mail small, simple 3D-printed models to anyone interested. They specify a size limit (roughly a keyring's dimensions) due to printing and postage costs, and encourage requests for things like "tiny abstract sculptures," "parametric trinkets," or "little robots." The offer is primarily driven by the enjoyment of the process and the novelty of sending physical objects in the digital age.
Commenters on the "Ask HN: Anyone want models snail-mailed to them?" post largely expressed confusion about what the original poster (OP) meant by "models." Some guessed physical, scale models, leading to discussions about the logistics and cost of shipping. Others interpreted "models" as referring to AI/ML models, prompting questions about the practicalities and purpose of mailing data or code physically. Several commenters jokingly inquired about the possibility of receiving fashion models or model airplanes. The overall sentiment leaned towards curiosity and playful skepticism due to the ambiguity of the original post. A few helpful users suggested the OP clarify their intent for better engagement.
Cal Bryant created a Python script to generate interlocking jigsaw puzzle pieces for 3D models, enabling the printing of objects larger than a printer's build volume. The script slices the model into customizable, interlocking chunks that can be individually printed and then assembled. The blog post details the process, including the Python code, demonstrating its use with a large articulated dragon model printed in PLA. The jigsaw approach simplifies large-scale 3D printing by removing the need for complex post-processing and allowing for greater design freedom.
HN commenters generally praised the project for its cleverness and potential applications. Several suggested improvements or alternative approaches, such as using dovetails for stronger joints, exploring different infill patterns for lighter prints, and considering kerf bends for curved surfaces. Some pointed out existing tools like OpenSCAD that could be leveraged. There was discussion about the practicality of printing large objects in pieces and the challenges of assembly, with suggestions like numbered pieces and alignment features. A few users expressed interest in using the tool for specific projects like building a kayak or a large enclosure. The creator responded to several comments, clarifying design choices and acknowledging the suggestions for future development.
The post details the process of reverse engineering the Bambu Lab printer's communication protocol used by the Bambu Handy and Bambu Studio software. Through network analysis and packet inspection, the author documented the message structures, including those for camera feeds, printer commands, and real-time status updates. This allowed for the creation of a proof-of-concept Python script capable of basic printer control, demonstrating the feasibility of developing independent software to interact with Bambu Lab printers. The documentation provided includes message format specifications, network endpoints, and example Python code snippets.
Hacker News commenters discuss the reverse engineering of the Bambu Handywork Connect print server software, mostly focusing on the legality and ethics of the endeavor. Some express concern over the potential for misuse and the chilling effect such actions could have on open communication between companies and their customer base. Others argue that reverse engineering is a legitimate activity, particularly for interoperability or when vendors are unresponsive to feature requests. A few commenters mention the common practice of similar reverse engineering efforts, pointing out that many devices rely on undocumented protocols. The discussion also touches on the technical aspects of the reverse engineering process, with some noting the use of Wireshark and Frida. Several users express interest in using the findings to integrate Bambu printers with other software, highlighting a desire for greater control and flexibility.
Cosmos Keyboard is a project aiming to create a personalized keyboard based on a 3D scan of the user's hands. The scan data is used to generate a unique key layout and keycap profiles perfectly tailored to the user's hand shape and size. The goal is to improve typing ergonomics, comfort, and potentially speed by optimizing key positions and angles for individual hand physiology. The project is currently in the prototype phase and utilizes readily available 3D scanning and printing technology to achieve this customization.
Hacker News users discussed the Cosmos keyboard with cautious optimism. Several expressed interest in the customizability and ergonomic potential, particularly for those with injuries or unique hand shapes. Concerns were raised about the reliance on a phone's camera for scanning accuracy and the lack of key travel/tactile feedback. Some questioned the practicality of the projected keyboard for touch typing and the potential distraction of constantly looking at one's hands. The high price point was also a significant deterrent for many, with some suggesting a lower-cost, less advanced version could be more appealing. A few commenters drew comparisons to other projected keyboards and input methods, highlighting the limitations of similar past projects. Overall, the concept intrigued many, but skepticism remained regarding the execution and real-world usability.
Summary of Comments ( 15 )
https://news.ycombinator.com/item?id=43053350
Hacker News users discussed the implications of 3DBenchy entering the public domain, mostly focusing on its continued relevance. Some questioned its usefulness as a benchmark given advancements in 3D printing technology, suggesting it's more of a nostalgic icon than a practical tool. Others argued it remains a valuable quick print for testing new filaments or printer tweaks due to its familiarity and readily available troubleshooting information. A few comments highlighted the smart move by the original creators to release it publicly, ensuring its longevity and preventing others from profiting off of slightly modified versions. Several users expressed their appreciation for its simple yet effective design and its contribution to the 3D printing community.
The Hacker News post "The Iconic 3DBenchy Enters the Public Domain" (https://news.ycombinator.com/item?id=43053350) has generated several comments discussing the implications of 3DBenchy's move to the public domain and its significance within the 3D printing community.
Several commenters express positive sentiment about Creative Tools' decision. One user describes it as "a class act" and highlights the benefit to the community now that anyone can freely modify and distribute derivatives of the Benchy. This sentiment is echoed by another who emphasizes the freedom it grants for creating and selling modified Benchys without legal concerns.
The discussion also touches upon the practical aspects of the public domain dedication. One commenter asks about the specific license used to ensure clarity and avoid potential misunderstandings regarding permitted usage. Another user responds, explaining that Creative Tools used CC0, which effectively relinquishes all copyright and related rights, placing the work firmly in the public domain. This exchange clarifies the legal ramifications of the decision.
Furthermore, the conversation delves into the history and cultural impact of 3DBenchy. A commenter recalls its ubiquitous presence in the 3D printing world, highlighting its utility as a benchmarking and calibration tool. They also mention seeing various iterations and modifications, demonstrating its influence on the community's creativity. Another user recounts its role as a "torture test" for new printers and filaments, illustrating its practical value beyond just calibration.
Some comments explore potential future uses of 3DBenchy now that it's in the public domain. One commenter suggests it could be incorporated into 3D modeling software as a standard test object. Another envisions its use in educational settings to teach 3D modeling principles. These comments highlight the potential for wider adoption and integration of Benchy across different applications.
Finally, there's a discussion regarding the enduring legacy of 3DBenchy. One commenter expresses the belief that it will continue to be widely used and recognized within the 3D printing community, solidifying its status as an iconic design. Another user remarks on the infrequent occurrence of objects achieving this level of recognition in the digital realm, underscoring the significance of Benchy's public domain status.
In summary, the comments on Hacker News reflect a generally positive response to 3DBenchy entering the public domain. They discuss the legal aspects of the decision, the practical implications for users, the historical context of Benchy's development, and its potential future uses. Overall, the comments paint a picture of a community that appreciates Creative Tools' generosity and anticipates the continued impact of this iconic 3D model.