BS EN ISO 10360‑5:2020 pdf download.Geometrical product specifications (GPS) – Acceptance and reverification tests for coordinate measuring systems (CMS).
6.3 Single‑stylus probing test
6.3.1 Application
6.3 applies to the single-stylus probing configuration and CMMs used with scanning mode probes, fixed multiple probes, fixed multiple styli and articulating probing systems. One of the multiple probes, or one of the multiple styli, or one of the articulating orientations, may be used for this test. See 6.3.3.1 for their orientation.
6.3.2 Principle
The principle of this test procedure is to measure a test sphere using 25 points probed with a single stylus and to observe the size and form error.
The results of these tests may be highly dependent on the stylus length, stiffness and diameter.
6.3.3 Procedure
6.3.3.1 The stylus orientation shall be parallel to the ram axis, unless otherwise specified. Any change of orientation of the stylus may significantly affect the test result.
On dual ram CMMs, two separate tests should be run, one with each ram, both in simplex operating mode, in accordance with ISO 10360‑2.
6.3.3.2 Set up and qualify the probing system in accordance with the manufacturer's normal
procedures (see 6.2.2).
6.3.3.3 If an automated stylus or probe changing system is supplied with the CMM, return the stylus or probe to the rack before running this test. Additionally, if an articulating head is included, articulate the probe away and back again before running this test.
If no automated stylus or probe change system is available, it is not recommended that this is changed manually as this will have a detrimental effect on performance.
6.3.3.4 Measure and record 25 points. The points shall be approximately evenly distributed over at least a hemisphere of the test sphere keeping within any system limitations as specified by the manufacturer. Where the manufacturer has system limitations that mean this distribution is not possible, this shall be stated clearly with their specifications. The point positions shall be at the discretion of the user and, if not specified, the following probing pattern is recommended (see Figure 2):
— one point on the pole (defined by the direction of the stylus shaft) of the test sphere;
— four points (equally spaced) 22,5° below the pole;
— eight points (equally spaced) 45° below the pole and rotated 22,5° relative to the previous group;
— four points (equally spaced) 67,5° below the pole and rotated 22,5° relative to the previous group;
— eight points (equally spaced) 90° below the pole (i.e. on the equator) and rotated 22,5° relative to the previous group.BS EN ISO 10360‑5 pdf download.