uv resin 3d printer Stereolithography (SLA) is a 3D printing process that uses a laser to cure the photopolymer resin layer by layer. Additive manufacturing for the dental sector often uses with uv resin 3d printer more suited to the production of small smooth parts with fine details of high precision. Although there are different types of resins available for every purpose in the market, the working logic of all UV resin 3D printers is the same. This article describes the SLA printing process, presents the limitations and benefits of designing components to print with stereolithography. SLA additive manufacturing process A conventional SLA 3D printer will contain an ultraviolet laser for curing a specific layer of a component from a photoresist reservoir. The bottom of the tank is transparent, and the UV laser is precisely controlled to draw a 2D outline of the printed object. The laser hardens the resin forming a solid layer. A very thin slice of the object is created each time the laser beam passes. This thin layer is glued to the layer that precedes (or the construction plate) and the bottom of the tank. The newly printed layer is then separated from the bottom of the tank (depending on the machine, this may involve peeling, slipping or agitating the tank), the building plate then moves away from a layer thickness and the process is repeated until the part is finished. For an SLA print to be successful, it is essential to reduce the forces on the newly printed layers during the separation step. The separation step creates areas of high stress along a potentially razor thin edge that can lead to a high rate of failure and deformation of the workpiece (the workpiece can adhere to the bottom of the reservoir rather than the plate of construction). The limits of the stereolithography process UV resin 3D printers typically have a much smaller build volume than most FDM printers, apart from commercial machines. The Formlabs Form 2 Professional 3D printer (a common desktop SLA printer) has a build volume of 145mm × 145mm × 175mm while the Ultimaker 2+ (a common FDM desktop printer) offers 223mm × 223mm × 205mm × 205mm . When SLA print geometries exceed the capacity of the printer, they can be printed in smaller sections and then assembled. The best method to glue the printed SLA components together is an epoxy of 5 to 30 minutes.  

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