Precision: the most direct is the accuracy difference, but also the buyers most valued quality. Thousands of machines hit the surface of the product has a very obvious layer line, and industrial-grade like the German EOS M280 print out of the metal products, the quality of the same as the machine tool finishing, of course, the machine price is as high as 600W.
Printing principle: FDM (Fused Deposition) is the world's earliest invention of the 3D printing method, as early as the 80s of the last century has appeared, 3d printing The "scientific name" is actually rapid prototyping manufacturing or additive manufacturing, 3D printing is in recent years by the mouth of Obama to promote the fire up the vocabulary. Currently on the market at the low end of the printer (10W or less) 100% FDM principle, due to the defects of the technology leads to a variety of problems such as printing accuracy, deformation; high-end a bit of SLA (light-curing molding), the use of photosensitive resin light characteristics, the use of ultraviolet light, such as light sources, molding accuracy is higher, but the resin in the print will emit toxic substances, so it is not suitable for home use; the highest end of the like SLS ( Selective Laser Sintering), the use of laser to make the print material curing, the highest precision, the price is also the most expensive, generally in the millions.
Printing materials: FDM fused deposition of the printing material is mostly ABS and PLA, SLA light curing is mostly photosensitive resin, SLS laser sintering can be nylon, metal, alloy, composite materials and so on.
Companies selling 3D printers:
US 3D system, stratasys, makerbot
Germany EOS
China Beijing Taier Times, Nanjing Baoyan, Hangzhou Mingzhan
Printing cost:
Mainly depends on what material you use to print, as well as the size of the print model, Fill rate and so on, ABS material 120-200 yuan / KG
All hand-typed, hope to adopt!