Osman Pehlivanoğlu 030040089 9th Week

Defining a Line (In APT Codes)
In APT, a line can be defined in many ways. Some of the definitions of a straight line are:
L1= LINE/P1,P2
(line passing through points P1 and P2)
L2= LINE/P2, PARLEL, L1
(line passing through point P2 and paallel to line L1)
L3= LINE/P1, ATANGL, 60, L2
(line passing through point P1 and at an angle 60 degree to line L2)
L4= LINE/P1, ATANGL, -120, L2
(line passing through point P1 and at angle -120 degree to line L2)
L5= LINE/PARLEL, L31, YLARGE, 10
(line parallel to line L31 and offset by 10 mm towards Y large coordinate)
(CNC Machines, Pabla, p.86)

Ballistic Particle Manufacturing
Ballistic particle manufacturing was marketed as one of the most affordable RP processes at that time, with very inexpensive build materials.
The BPM utilizes ink-jet or droplet based manufacturing (DBM) techniques, where it builds models by firing micro-droplets of molten wax material from a moving nozzle or jet onto a stationary platform. The platform is then lowered and the process is repeated until a three-dimensional object is printed. Most parts are built as a hollow shell, although down to a 0.25inch internal cross hatch may be used. (Rapid Prototyping Technology, Cooper, p.22)

Shape Deposition Manufacturing (SDM)
Shape Deposition Manufacturing (SDM) is a layer manufacturing technology in which the layers are shaped by CNC. Thus, it is an additive- cum-subtractive process. A temporary material is used for building support cum-subtractive process. A temporary material is used for building support layers needed for overhanging, undercut, and disjoint features. The technology is capable of creating multi-material objects, functionally graded materials, and objects with embedded sensors, advance tooling, and other electronic devices. (Rapid Prototyping, Venuvinod, p.300)

Knurling
Knurling is the process of impressing a straight or diamond-shaped pattern into a cylindrical piece using special knurling tools. The knurl is formed by forcing the hardened knurling rollers on the knurling tool into the surface of a revolving cylindrical part. The pressure of the knurling tool creates a pattern of straight or diamond grooves as material is forced outward against the knurling rollers. (Machine Trades Blueprint Reading, 2nd Edition, Taylor, p.194)