Personal 3D Printers - Project 3d Printers

Personal 3D Printers

From classrooms to design shops, 3D printers seem to be popping everywhere. And as you would expect for a product that appeals to everyone from professional designers to educators to hobbyists, Personal 3D printers vary wildly in the features they offer and the amount they cost.

What to Look for in a 3D Printer

Not sure how to decide which Personal 3D printer is right for you? Here are a few things to consider when shopping for a printer.

Printer type: There are two main types of 3D printers: FFF (fused filament fabrication) and SLA (stereolithography). FFF printers — which also cover FFM (fused filament manufacturing) and FDM (fused deposition modeling) devices — work by melting a plastic filament in a moving print head to form the model. SLA printers use an ultraviolet (UV) laser to solidify a resin, focusing the laser to form the solid model. FFF printers are generally cheaper, simpler and easier to use, although SLA models like the XYZ printing Nobel 1.0 (around $1,000) and the $1,295 People Moai are lowering the price difference.

Printing materials: Whichever type of printer you choose, pay attention to the type of material it uses when printing. The filament material used by FFF printers like the LulzBot TAZ 6 is available in several different materials, such as PLA (a brittle, biodegradable material), ABS (the same plastic used in Lego blocks), nylon, TPE (a soft, rubber-like material) and HDPE (a light, tough polystyrene). Many of these materials, particularly PLA and ABS, are available in a huge range of colors. Filaments come in two sizes: 1.75 mm and 3 mm, which are not interchangeable.

MORE: 3D Printing Materials: Pros and Cons for Each Type

SLA printers have fewer options than their FFF counterparts, but printers like the Form 2 can use resins that produce models ranging from very rigid to flexible and rubbery. The best printers can use a wide range of materials, each of which comes with its own strengths and weaknesses. (HDPE, for example, is light and tough, but not suitable for food use, while nylon is food-safe.)

Note that some printers only allow the use of approved materials or materials produced by the same company that made the printer. In that sense, those types of 3D printers are like more traditional paper printers: The manufacturers sell the hardware cheaply and then make money back on the consumables. (Our top budget 3D printer, the da Vinci Mini, only works with PLA filament from manufacturer XYZprinting, for example; however, XYZ's filament costs about the same as most third-party materials.) Other 3D printers place no restrictions on the type or origin of the material.

Print volume: All printers have limits on the size of the 3D print they can produce. That limit is defined by the size of the print bed and how far the printer can move the printhead. This is usually measured in cubic inches, but you should also pay attention to each of the individual dimensions, which determine the maximum size 3D print the device can create. So, for example, if a printer like the LulzBot Mini has a print volume of 223 cubic inches (6.2 x 6 x 6 inches), it can print objects that are up to just less than 6 inches high, wide and deep.

Print speed and quality: 3D printing is a slow business, and at present, there's no way to get around this. You should expect a 3- to 4-inch model to typically take between 6 and 12 hours to print, depending on the print quality you select. That's because of the way 3D printing works: The print is constructed in layers. The thicker these layers are, the quicker the print is produced but the lower the print quality is, as the layers become more visible. So, there is a trade-off between print speed and print quality.

The best printers will allow you to determine which way you want to go with this, producing prints quickly or more slowly but at a higher quality. The best printers offer a wide range of quality settings, from fast (but low quality) to slow (but high quality).

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