Abstract: A three-dimensional printing system for printing out an object includes a support plate, a delivery module, one or multiple printing devices, and an object detaching member. The delivery module includes a belt covering the support plate. The belt includes a printing area above the support plate and a separation section of the support plate. The printing device is arranged corresponding to the support plate. The object is formed layer by layer in the printing area via the printing device and is moved with the belt. The object detaching member is arranged under the belt and between the support plate and the separation section. The object detaching member includes an abutment portion abutted against the belt. The abutment portion is at a position higher than the separation section to form a height level difference.

Abstract: A 3D printer includes a machine body, a printing platform, a scanning and driving module, and a scanning and supporting module. The machine body has a bottom plate. The printing platform and the scanning and driving module are disposed on the bottom plate. The printing platform includes a slide track and a movable printing substrate. The scanning and driving module and the slide track are staggeredly disposed such that the scanning and driving module and the slide track do not interfere with the movement of the printing substrate. The scanning and supporting module is detachably combined with the scanning and driving module and is driven by the scanning and driving module.

Abstract: A detachable scanning and supporting module of a 3D printer includes a machine body, a printing platform, a scanning and driving module, and a scanning and supporting module. The machine body has a bottom plate. The printing platform and the scanning and driving module are disposed on the bottom plate. The printing platform includes a slide track and a movable printing substrate. The scanning and driving module and the slide track are staggeredly disposed such that the scanning and driving module and the slide track do not interfere with the movement of the printing substrate. The scanning and supporting module is detachably combined with the scanning and driving module and is driven by the scanning and driving module.

Abstract: In an aligning mechanism of a 3D printer scanning device, a scan driving module includes a base and a motor, and the motor has a driving gear. The scan loading module includes a loading table, a turntable, and an engaging gear connected to the turntable, and the loading table has a notch, and the engaging gear is exposed from the notch. The driving gear of the scan driving module and the engaging gear of the scan loading module have a rounded corner or a positioning portion, so that the driving gear is engaged precisely with the engaging gear.