A planar, waveguide-based silicon Schottky barrier photodetector includes a third terminal in the form of a field plate to improve the responsivity of the detector. The control circuit part has current limiting function of prevent the flowing of any current which is above a predetermined value as well as function of detecting malfunction heat generation by which a primary electric current is blocked compulsorily. Additional variants and embodiments may also be disclosed and claimed. The deflecting rod supports the ground warp and directs the pile warp to cross and interpenetrate through the ground warp before being deflected into the back shed. A cantilever supported gantry beam supports the material delivery heads inside the interior mandrel surface.