Additive manufacturing device for manufacturing a three dimensional object

An additive manufacturing device for manufacturing a three dimensional object, comprising

• a planar foil substrate;
• a resin depositor for depositing a layer of curable resin on a first side of the foil substrate, the resin depositor comprising an input side resin storage unit and a variable height blade which sets the thickness of the curable resin on the first side of the foil substrate by controlling the amount of curable resin which can exit the resin storage unit, the thickness being the height between the blade and the foil substrate;
• a radiation source for radiation curing the resin layer on the first side of the foil substrate, wherein a cured resin layer represents a cross sectional slice of a three dimensional object;
• a stage configured to hold a stacked arrangement of one or more cured resin layers representing at least in part the three dimensional object;
• a positioning system for relative positioning the foil substrate and the stage;
• a resin collection unit arranged to collect unused curable resin from the substrate, and
• a resin conditioning unit upstream from the input side resin storage unit and comprising a resin humidity control system, wherein the resin conditioning unit is in communication with the resin collection unit and the input side resin storage unit, wherein the resin collection unit comprises a scraper having curvature along a scraping edge, and wherein the scraper is in contact engagement with the planar foil substrate.