AS ISO ASTM 52902:2021 pdf free

09-08 comment

AS ISO ASTM 52902:2021 pdf free.Additive manufacturing一Test artifacts一 Geometric capability assessment of additive manufacturing systems.
5.6 Discussion of file conversion
When a CAD model is converted to AMF, STL (or any intermediate file format), sufficient fidelity shall be maintained to ensure that the test artifact produced from it fairly reflects the capabilities of the AM system under assessment. The file conversion tolerance selected should ensure that the maximum deviation of the data from the nominal CAD model is less than one quarter and, based on good measurement practice, ideally less than one tenth of the expected accuracy of the AM system being assessed. Currently, most additive manufacturing equipment cannot produce features with a resolution better than 10 urn, therefore CAD models are saved to STL/AMF ensuring at least a 2,5 lIm accuracy or better. This is only general guidance and should be confirmed for the specific output system. It is recommended that users check the maximum deviation and record the conversion parameters used, as well as any maximum deviation (chord height and angular tolerance).
Files should not be scaled up or down either during conversion or afterward. Machine correction factors (e.g. offsets, axis scaling, etc.) may be used and should be documented as part of the process specification.
5.7 AMF preferred (with conversion instructions/ resolutions)
The AMF file format as defined by ISO/ASTM 52915 is the preferred model format for test artifact geometry representation due to its ability to store high fidelity geometry with embedded units in an intermediate file format.
5.8 Need for test specification and test process
This document forms the basis for the general Test Plan/Specification described in ASTM F2971:2013, Annex Al, element “D”, but specifics about its implementation need recording to accurately document the Test Process (element “E” in Annex Al), used for producing the parts as discussed in Clause 6.
5.9 Quantity of test artifacts
For a complete test of machine performance, two things dictate the quantity of the test artifacts produced. First, the Test Specification/Test Process shall ensure a quantity of samples, typically no less than five, so that statistically significant measurements can be made. Second, sufficient coverage (see 5.5) of the build platform needs to be made to account for variations in performance between build locations. Fewer test artifacts with less complete coverage may be used for spot checks or limited demonstrations, such as the example detailed in Annex A. The number of artifacts shall be agreed upon between the buyer and seller and shall permit to perform at least S mesurements.AS ISO ASTM 52902 pdf download.

Download It Now Download Here
AS NZS 60598.2.17:2019 AS pdf free download

AS NZS 60598.2.17:2019

AS NZS 60598.2.17:2019 pdf free.Luminaires Part 2.17: Particular requirements—Luminaires for stage lighting, television and film studios (outdoor and indoor). 17.7.2 The luminaires for certain types of high-intensity discharge lamp, where an explosion risk is declared by the lamp manufacturer, shall incorporate a device to prevent immediate access to the lamp after switching-off or shall be marked in accordance with the...
AS NZS 4859.1:2018 AS pdf free download

AS NZS 4859.1:2018

AS NZS 4859.1:2018 pdf free.Thermal insulation materials for buildings Part 1: General criteria and technical provisions. 2.1 GENERAL This Section provides performance criteria and technical provisions for materials to be used in the thermal insulation of buildings and building services. In addition to this Section the insulating material shall— (a) meet packaging and labelling requirements of Section 3; (b) where...
AS NZS 2442.2:2021 AS pdf free download

AS NZS 2442.2:2021

AS NZS 2442.2:2021 pdf free.Performance of household electrical appliances一Rotary clothes dryers Part 2: Energy efficiency labelling requirements. Section 2 Test requirements, calculations and algorithms for the energy rating label 2.1 General This Section sets out the test requirements, equations and procedures br calculating values of the comparative energy consumption (CEC), and star rating, which appear on an energy rating label....


Anonymous netizen Fill in information