AS ISO ASTM 52921:2020 pdf free download – Standard terminology for additive manufacturing -Coordinate systems and test method ologies

AS ISO ASTM 52921:2020 pdf free download – Standard terminology for additive manufacturing -Coordinate systems and test method ologies.
build platform. n—af a base which provides a surface upon which the build is ‘started and supported throughout the build process (see Al, I).
The machme build platfonn may be solid or perforated and made (mm a wide saricly of materials and constructions.
ln Sonic systems the parts an built attached to the build platform, either directly or through a support structure. In other systems, such as powder bed systems. no direct mechanical tiiture between the build and the platform may be required.
build surface, n—area where material is added, normally on the last deposited layer which bccomcs the foundation upon which thc nest layer is formed.
tiss.—Por the lirsi bycr the build surfacc is often the build pbirorm.
f the orientation of the material deposition or consolidalion rne.ins, or both, is satiable, it may be delined rebtive to the build surface IIoi’ example. a blown powder head may be kept normal to H. Sec also 7 axis discussiont.
front. n—of a machine, shall be designated by the machine builder.
Dtsrsss.0e4—Gcncrtally. this is the side of the machine that the operator (aces to access the user interface or primary viewing window, or both. (See Al.lj.
machine coordinate system. n—a three-dimensional Cartesian coordinate system as defined by a fixed point on the build platform “with the three principal axes labeled X. Y. and Z, with rotary axes about each of theses axes labeled A. B. and C, respectively” see All. Al .2. and Al .3) as stated in ISO K41.
origin, n—a designated reference point at which the three primary axes in a Cartesian coordinate system intersect. Synonyms: zero point, or (0, 0. 0) when using X. V. and Z coordi nates
build volume origin, n—shall be located at the center of the build platform fixed on the build facing surface.
DISCUSSION— For example, a specimen which is placed so that its longest dimension is parallel to the Z axis, the second longest dimension is parallel to the X axis, and its shortest overall dimension is parallel to the Y axis shall he defined as having a ZXY orientation (see A I .8 and A I . 10 for examples).
DIs’ussloN—Where symmetry allows unambiguous designation of orientation by listing fiwer than three axes (in descending order of length). orthogonal orientation notation can he Further abbreviated (see
Al.9 and A 1.10).
Discussion—Some combinations of part symmetry in an orthogonal initial build orientation fully define only one possible orientation and therefore no image is required to communicate the initial build orientation. This is the case for parts like the dog bone specimen (1)638 or Iso 527) in A1.lO, which are bilaterally symmetrical (see A1.9) through its geometric center in the XY. XZ, YZ planes and have no rotational symmetry. This is also the case for parts like the round tension bar (see Al. 10) which have 3600 rotational symmetry through a center axis and are also bilaterally symmetrical across the plane.