Abstract: The invention relates to an electromagnet coil assembly in particular an electromagnet coil assembly at least comprising a core; a winding constituting the coil being wound in a plurality of turns around said core; and multiple power taps for electrically connecting the winding to an external power circuit. Most electromagnetic coils implementing HTS materials are wound for academic purposes, which are generally hand-wound. Any coil needs power leads or power taps of some sort. However, in academics applications, coils are usually “one-offs” and not much time is invested in the manufacturability on a large scale and quantity basis. It is thus an object of the present invention to provide an electromagnet coil assembly implementing HTS materials, which coil assembly can be mass-manufactured in a reliable, robust and cost-effective manner.

Abstract: An additive manufacturing system for building three-dimensional objects, comprising a box-shaped build chamber (2) having a plurality of sides (4), and an x-y gantry (10) having mounted thereon a nozzle head assembly (12) for movement thereof relative to the build chamber (2). The additive manufacturing system (1) further comprises a plurality of roller units (14, 16) evenly arranged along a circumference (18) of one side of the plurality of sides (4), wherein each roller unit (14, 16) comprises a cover sheet (20, 22) rolled at least in part into coil form and wherein each cover sheet (20, 22) extends from the roller unit (14, 16) to the nozzle head assembly (12) for closing the build chamber (2) there between. Each roller unit (14, 16) is configured to allow the cover sheet (20, 22) to coil and uncoil in correspondence to the movement of the nozzle head assembly (12).