Xiomara Armijo_Saiqa Iqbal     _ In this assignment we dealt with a given section having a dimension of 500 mm X 500 mm X 350 mm to have a ribbed chair by using the Laser Cutter. The process of modifying the plain simple section into a waffled one is given below: 1._ first create a base file having separated layer for each of the major commands (base, contour, ribs, intersection, fabrication) along with their sub layers for x and y axes. 2._ selects the outer surface of the given section. Then apply the cage edit command (bounding box on). the number of control points can be manipulated by changing the x, y, z point count. 3._ moves the control points to get the desired shape. Keep the two outer layers of control points in fixed position to maintain the given section in the 2 ends_ select the contour x layer. And command Contour in x direction. _ specify the distance between contouring according to the material distance and the grid resolution. _ select the contour y layer and command Contour in y direction in the same process. ­­­_offset the curve lines of the contours inside. the sections can be manipulated with the control points. _ select the rib layer and use the command Planar Surface for the each contour curves with their offset curves to get the ribs. _ maintain the two layers Rib x and Rib y for the ribs in x and y direction.    _ Select another layer for intersect, command Intersect by selecting the ribs x and ribs y. _ select another layer for drawing a pipe in on of the intersection line. The pipe diameter should be the thickness of the material. _turn of all the offset options except the Mid and the Center. _ move the end of pipe ( name it Pipe x) to middle of the intersection line. then make a copy of the pipe (Pipe y) to the other end of the pipe. _ copy the two pipes together to the mid point of each intersection lines. _ by selecting the ribs one by one run the command Intersect between that rib with its corresponding pipes. _ split the joints from the ribs by the command Split. _ selecting the ribs one by one run the command Unroll Surface by selecting the ‘Rib X Unroll’ and ‘Rib Y Unroll’. _ move the unrolled ribs away from the origin. _ select the objects of Rib X Unroll and Rib Y Unroll layer and run the command Duplicate borders. _ move the selected curves away from the rib surfaces. _ name the pieces by numbers.