Hack Chat 0x02: Introduction to 3D Printing
Steag Center for Smart Technologies is organizing second HackChat exclusively for the Rajagiri students.
This week we are going to learn about 3D Printing Technologies.
Venue: Steag Center, KE Block Extension. Rajagiri Engineering college.
Time: 5:00 PM to 5:30 PM
Register here: bit.ly/hackchat2
No Registration Fee
salmanfaris last edited by
3D Printing is an additive manufacturing process that creates a physical object from a digital design. There are different 3D printing technologies and materials you can print with, but all are based on the same principle: a digital model is turned into a solid three-dimensional physical object by adding material layer by layer. In an additive process, an object is created by laying down successive layers of material until the object is created. Each of these layers can be seen as a thinly sliced horizontal cross-section of the eventual object.(Source:- https://www.3dhubs.com)
There is a different way to print a 3D object.
This process that converts liquid plastic into solid objects.
These 3D printing technologies are also available in desktop 3D printers. Materials are limited to resins, but new varieties have appeared recently providing strength or flexibility to the final objects.SLA and DLP 3D printers produce highly accurate parts with smooth surface finishes and are commonly used for highly detailed sculptures, jewellery moulds, and prototypes. Because of their relatively small size, they are not recommended for printing large objects.(Source:- https://www.3dhubs.com)
Material Jetting (PolyJet and MultiJet Modeling)
Material Jetting (Stratasys PolyJet and 3D Systems MultiJet Modeling) technologies are similar to inkjet printing, but instead of jetting drops of ink onto paper, these 3D printers jet layers of liquid photopolymer onto a build tray and cure them instantly using UV light.
Selective Laser Sintering (SLS)
Selective Laser Sintering (SLS) uses a laser to melt and solidify layers of powdered material into finished objects.
Fused-deposition moulding (FDM)
The FDM printing process starts with a string of solid material called the filament. This line of filament is guided from a reel attached to the 3D printer to a heated nozzle inside of the 3D printer that melts the material. Once in a melted state, the material can be extruded on a specific and predetermined path created by the software on the computer. As the material is extruded as a layer of the object on this path, it instantly cools down and solidifies – providing the foundation for the next layer of material until the entire object is manufactured.
As the cheapest 3D printing technology on the market, FDM also offers a wide variety of plastic-based materials in a rainbow of colors including ABS, PLA, nylon and even more exotic material blends including carbon, bronze or wood.(Source :- https://www.3dhubs.com)
salmanfaris last edited by
The material used will affect the mechanical properties and accuracy of the printed part, but also its price. The most common FDM materials are summarized in the table below. (Source:- https://www.3dhubs.com/knowledge-base/introduction-fdm-3d-printing
FlashForge 3D Printer Creator Pro, Metal Frame Structure, Acrylic Covers, Optimized Build Platform, Dual Extruder W/2 Spools, Works with ABS and PLA.
@Ggreeshma-stani Nailed the PCB in terms of the schematic. But you got it a little bad on the layout side. There are some thumb rules while designing a layout of PCB.
Always place the oscillator and it's capacitors(C1, C2) near to the IC. If you have a doubt on this try checking the Arduino boards or any other boards. you will find an SMD chip crystal alongside of the Arduino XTAL pins. If you ask the reason for this that's simple, to avoid noise creeping in. Crystals provide the clock to the entire digital logic inside the IC. So, there should not be any noise in it. If noise is there, obviously you'll have timing issues.
The bypass caps on the voltage regulator must be placed close to the regulator's input and output pins. The reason for this is also pretty simple, bypass caps will filter out noise coming from the power supply and few other reasons too. So, try placing these bypass caps as close as possible to IC.
Apart from these points, the PCB looked good. Great work. Remember that this message is not to discourage you but just to give a suggestion so that you'll improve it in the next design.
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@salmanfaris the pressure range that we have to measure is between 5-10 cmH20 (ie almost 0.07 - 0.0.14 psi)
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