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Tpl 3d printing
Downsview : Toronto Public Library
| Year | Details |
|---|---|
| 1956 | North York Public Library Board appoints Paul Meschino as the architect for the proposed Downsview Branch, 18 April. On 4 May, it passes a bylaw to expropriate "certain lands at the corner of Keele Street and Paxtonia Boulevard for public library purposes, said lands being part of Block B, Plan 4571, North York owned by Goodburn Construction Ltd." On 23 May, it approves "a price of $30,000.00 with the understanding that a donation of $2000.00 will be made to the Board." (North York Public Library Board minutes). |
| 1960 | North York Public Library Board plans Downsview Branch as its first regional library for the west end of the municipality. |
| 1961 | Sod-turning ceremony, 9 May. |
| 1962 | Opened to the public, 6 March. Paul Meschino Architect. |
| 1963 | Officially opened on 26 May, with the cornerstone (dated 1961) laid by Vivian Thomas Graff, the widow of William L. Graff, North York’s chief librarian since 1955, who had died in office on 15 October 1962. |
| 1965 | Enlarged to regional/area size. Officially opened, 15 April. Paul Meschino Architect. |
| 1995 | Closed for renovations and expansion, 26 June. |
| 1996 | Reopened, 6 May. Makrimichalos Cugini Architects. |
| 1997 | Included on an inventory of North York's Modernist Architecture, prepared by the City of North York Planning Department, Urban Design Division. |
| 2011 | Renovation that included addition of Express Checkout, new shelving and display cases and reconfiguration of the service desk. |
| 2012 | 50th celebration of Downsview Branch. |
| 2016 | Digital Innovation Hub created on the main floor level. |
| 2018 | Youth Hub opens September, 2018. |
3D Printing | Terrebonne Parish Library System
3D printing has never been easier. With the 3D printer at the Terrebonne Parish Library, anyone can send in a file to be printed. While this process is easy, finding something you want to print or even designing something to be printed may seem like a difficult task. However, there are places where you can find free files to be printed and even free places to create your own 3D model files!
Thingiverse.comThingiverse is an online community of which people who create 3D models can share their creations online with other members of the community. For the most part, these files are all free to use for download or even for you to edit their work yourself. Thingiverse contains everything from tools to toys to replacement parts.
Downloading a file from thingiverse.com is quite simple. Once you find a model you want to download, it is as simple as clicking the blue “Download All Files” button that is located to the upper right part of the page and your download should start momentarily.
Tinkercad.com is an online workspace where you can create, edit, and save 3D models to be printed out here at the library. Registering for this program is free and it can be operated right on your browser.
Jumping into tinkercad right at the beginning may seem very intimidating, but there are an abundant amount of resources to help you run the program. You can choose to start by creating a 3D model from scratch, but also, you can import many of the 3D files on thingiverse.com to edit them on tinkercad.com. Once you have created a model you want to print, you can click the export button in the workspace or press the download button in the main menu. Make sure when you choose to save the file as an .OBJ file or a .STL file.
What Next?Once you have your model file to be printed, your next step is to send it to the Terrebonne Parish Library to be printed. At the bottom of our main page on mytpl.
org under “Important Links,” click the link that says “3D Printing.”
With this link, you can choose to watch a video about 3D printing, read the 3D Printing Policy, or fill out a 3D Submission Form. It is recommended you review the 3D Printing Policy, as the 3D printing policy contains information on pricing for printed models, limitations of the 3D printer we currently use, limitations of what we can print, and protocol for when problems arise with printing
From there, filling out the form and uploading the 3D file is self-explanatory. As for when the form asks whether you need rafts or supports for your file, the thingiverse.com page for your file you need to print should say whether supports and/or rafts are necessary. Once we get this information, the staff at the Terrebonne Parish Library should be contacting you, confirming we’ve got your order! Happy Printing!
– Caleb, Reference Department
New technique increases 3D printing speed by 1000-10000 times
Chinese University of Hong Kong (CUHK)
Figure.
FP-TPL is based on spatial and temporal focusing.
Ultra-precise 3-D printing technology is key to the production of precision biomedical and photonic devices. However, the current printing technology is limited by its low efficiency and high cost. Professor Shi-Chi Chen and his team from the Department of Mechanical Engineering and Automation of the Chinese University of Hong Kong (CUHK) in collaboration with Livermore National Laboratory. Lawrence developed femtosecond emission two-photon lithography (FP-TPL) printing technology. nine0003
By manipulating the laser spectrum through temporal focusing, the laser 3D printing process is performed in a parallel layer-by-layer fashion instead of dot-by-dot writing. This new technology dramatically increases print speed by 1,000 to 10,000 times and reduces costs by 98 percent. This achievement was recently published in Science, confirming his technological breakthrough that brings nanoscale 3D printing into a new era.
Conventional nanoscale 3D printing technology, i.
e. two photon polymerization (TPP), works in dot scan mode. Thus, even a centimeter-sized object can take anywhere from days to weeks to manufacture (creation rate ~0.1 mm3/hour). The process is laborious and expensive, which hinders practical and industrial applications. To increase speed, the resolution of the finished product is often sacrificed. Professor Chen and his team overcame a difficult problem by using the concept of temporal focusing, where a programmable femtosecond light layer is formed in the focal plane for parallel nanoimpact; this is equivalent to simultaneously projecting millions of laser foci onto the focal plane, replacing the traditional method of focusing and scanning the laser at only one point. In other words, FP-TPL technology can produce an entire plane in the time it takes for a point scanning system to create a point. nine0003
Fig. 1. Print complex 3D structures at submicron resolution via FP-TPL. (A to C)
Millimeter-scale structure with sub-micrometer-sized elements supported on a US center over a reflective surface.
In 8 minutes 20 s, a 2.20 mm × 2.20 mm × 0.25 mm cuboid was printed, showing a 3D printing speed of 8.7 mm3/hr. In contrast, dot-scan methods would take several hours to print this cuboid. (D) A 3D microplate printed by 2D layering showing print uniformity that is indistinguishable from that of commercial serial scanning systems. (E and F) Spiral structures printed by single layer projection, demonstrating the ability to quickly print curvilinear structures within single digit millisecond time scales without any movement of the sliders. (G to J) Protruding 3D structures printed by stitching multiple 2D projections, demonstrating the ability to print objects with depth resolution. Bridge structure in (G) with angles of inclination 90° makes it difficult to print using dot-scan TPL methods or any other method due to its large slope relative to the smallest element size and sub-micron element resolution. Credit: Chinese University of Hong Kong (CUHK)
Fig. 2. Printed nanowires showing FP-TPL nanoscale resolution.
(A) Width (along lateral direction) and (B) height (along axial direction) of suspended nanowires printed under various conditions. nine0008
The width of the lines in the projected DMD pattern varied from 3 to 6 pixels with a fixed period of 30 pixels. Each pixel (px) is displayed at 151 nm in the projected image. The HP, MP, and LP labels refer to high (42 nW/pix), medium (39 nW/pix), and low (35 nW/pix) power levels, respectively. All markers of a specific shape represent data points created at the same power level, and all markers of a specific color represent the same line width. Printing was performed using a femtosecond laser with a central wavelength of 800 nm and a nominal pulse width of 35 fs and an objective with a numerical aperture of 60 × 1.25. (C and D) Scanning electron microscope images of a suspended nanowire. Credit: Chinese University of Hong Kong (CUHK) nine0003
What makes FP-TPL a breakthrough technology is that it not only greatly improves speed (approx.
10–100 mm3/hr) but also improves resolution (~140 nm/175 nm lateral and axial) and reduces cost (US$1.5/mm3). Professor Chen pointed out that typical equipment in a TPP system includes a femtosecond laser source and beam scanning devices such as a digital micromirror device (DMD). Because the main cost of a TPP system is a laser source with a typical lifespan of ~20,000 hours, reducing fabrication time from days to minutes can greatly extend laser life and indirectly reduce average printing cost from $88/mm3 to $1.5 . / mm3 - reduction by 98 percent.
Due to the slow point scanning process and the inability to print support structures, traditional TPP systems cannot produce large complex and overhanging structures. The FP-TPL technology overcomes this limitation due to its high printing speed, i.e., the partially polymerized parts quickly fuse before they can be dislodged in the liquid resin, allowing the production of large-scale complex and overhanging structures, as shown in Figure 1(G).
Professor Chen said that FP-TPL technology can benefit many areas; for example, nanotechnology, advanced functional materials, micro-robotics and medical and drug delivery devices. With a significant increase in speed and cost reduction, FP-TPL technology can potentially be commercialized and widely applied in various fields in the future, producing from meso- to large-scale devices. nine0003
Source: https://phys.org/news/2019-12-technique-d.html
3D nanoprinting technology accelerated 1000 times
Researchers have developed a nanoscale 3D printing technology that can produce tiny structures much faster than conventional two-photon lithography methods.
Using a new method of manipulating light from an ultrafast laser, researchers have developed a nanoscale 3D printing technology that can produce tiny structures 1,000 times faster than conventional two-photon lithography (TPL) techniques, without sacrificing resolution. nine0003
A new parallelization technique known as TPL Femtosecond Projection (FP-TPL) provides a depth resolution of 175 nanometers, better than conventional methods, and allows fabrication of designs with 90-degree overhangs that cannot currently be achieved . This technology could lead to tissue engineering (bioscapolds), flexible electronics, electrochemical interfaces, micro-optics, mechanical and optical metamaterials, and other functional micro- and nanostructures. nine0003
The work was carried out by researchers from the Livermore National Laboratory. Lawrence (LLNL) and the Chinese University of Hong Kong. Surabha Saha, lead author of the article, is currently an assistant professor at the School of Mechanical Engineering. George Woodruff at the Georgia Institute of Technology.
Existing nanoscale additive manufacturing technologies use a single high-intensity spot of light, typically around 700-800 nanometers in diameter, to convert photopolymer materials from liquids to solids.
Because the dot must scan the entire structure being produced, the current TPL technique can take many hours to generate complex 3D structures, limiting its ability to scale for practical applications. nine0003
“Instead of using one point of light, we project a million points at once,” Saha said. “This greatly increases the scale of the process, because instead of working with a single point that needs to be scanned to create a structure, we can use the entire plane of the projected light. Instead of focusing on a single point, we have an entire focused plane that can be copied into arbitrary structures."
To create a million dots, researchers use a digital mask similar to those used in projectors to create images and videos. In this case, the mask controls a femtosecond laser to create the desired light pattern in the liquid polymeric precursor material. High-intensity light causes a polymerization reaction that turns liquid into solid where needed to create three-dimensional structures.
