ISO 10791-8-2001 PDF

Full title and description

St ISO 10791-8-2001 — Test conditions for machining centres — Part 8: Evaluation of contouring performance in the three coordinate planes. This part specifies a method of checking the contouring (circular interpolation) performance of machining centres (numerically controlled milling machines and similar) by carrying out circular tests in the three coordinate planes (XY, YZ and XZ) and evaluating the radial deviation F and the circular deviation G in accordance with ISO 230‑4.

Abstract

This standard defines a short acceptance/periodic-check procedure (circular tests) to verify circular movement in one position per coordinate plane, at a selected feed rate and repeated in the opposite contouring direction. It is intended as a user-level method for periodic checking and comparison with initial (acceptance) results; it does not attempt to diagnose root causes of measured deviations. Measurement methods referenced include rotating one‑dimensional probes with mandrels, circular masterpieces with two‑dimensional probes, telescoping ball bars, or equivalent equipment of at least the same accuracy.

General information

• Status: Published; confirmed (reviewed and confirmed as current in ISO review process).
• Publication date: 2001 (Edition 1, published April 2001 / 2001-04).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.040.10 (Machining centres / machine tools).
• Edition / version: Edition 1 (2001).
• Number of pages: 6 pages (concise technical part).

Scope

Specifies a standardised procedure for performing circular contouring tests in the XY, YZ and XZ planes to evaluate contouring accuracy of machining centres. The tests check circular movement at one machine position per plane, at a chosen feed rate, and repeated in the opposite contouring direction; results are expressed as radial deviation (F) and circular deviation (G) following the methods and definitions of ISO 230‑4. The standard is intended for periodic verification and comparison against acceptance-test baselines; tolerances and specific diameters/feed rates for acceptance testing must be agreed between supplier and user.

Key topics and requirements

• Conduct circular tests in three coordinate planes (XY, YZ, XZ) to evaluate contouring performance.
• Measure and report radial deviation (F) and circular deviation (G) as defined in ISO 230‑4.
• Use measurement methods of adequate accuracy (rotating 1‑D probes with mandrels, 2‑D probes with circular masterpieces, telescoping ball bar, or equivalent).
• Perform tests at one feed rate and repeat in opposite contouring direction; use results for periodic checks and comparison to acceptance data.
• Standard does not diagnose causes of deviations; it provides a reproducible verification method — users/suppliers decide tolerances and test parameters for acceptance.

Typical use and users

Used by machine tool manufacturers, acceptance-test teams, factory metrology/quality engineers, independent test laboratories and maintenance groups to verify the contouring accuracy of NC machining centres during acceptance and for periodic monitoring. The tests provide compact, repeatable checks that supplement the fuller geometric and kinematic tests given in other parts of the ISO 10791 series and ISO 230 test codes.

Related standards

Part of the ISO 10791 series (other parts cover geometric tests, positioning accuracy, speeds and interpolations, etc.). Directly references and uses definitions/methods from ISO 230‑4 (circular tests for NC machine tools) and refers to measurement-method guidance in ISO 230‑1. Related ISO documents and parts to consult include ISO 10791‑1, ISO 10791‑6 and ISO 230‑4 (and ISO 230‑1 for general measuring principles).

Keywords

machining centres; contouring; circular test; circular deviation G; radial deviation F; ISO 230‑4; telescoping ball bar; probe measurement; NC interpolation; machine tool testing.

FAQ

Q: What is this standard?

A: ISO 10791‑8:2001 is the part of the ISO 10791 series that specifies a method for evaluating the contouring (circular interpolation) performance of machining centres by means of circular tests in the three coordinate planes.

Q: What does it cover?

A: It covers the procedure for performing circular tests in XY, YZ and XZ planes and the evaluation of radial deviation (F) and circular deviation (G). It describes acceptable measurement methods (probe/mandrel, circular masterpiece with 2‑D probe, telescoping ball bar or equivalent) but does not provide fault‑diagnosis procedures — it is intended for verification and periodic checks.

Q: Who typically uses it?

A: Machine tool manufacturers, acceptance/test engineers, metrology/quality departments, independent test labs and maintenance teams use it for acceptance testing and periodic verification of contouring accuracy.

Q: Is it current or superseded?

A: ISO lists ISO 10791‑8:2001 (Edition 1, 2001) as published and notes it was reviewed and confirmed (the ISO bibliographic record indicates it was last reviewed/confirmed in a review cycle), so this 2001 edition remains the current published version. Users should check their national body for any national amendments or updates before purchase.

Q: Is it part of a series?

A: Yes — it is Part 8 of the ISO 10791 series (Test conditions for machining centres). Other parts in the series address geometric tests, positioning accuracy, speed/interpolation accuracy and related machine‑tool test procedures. Consult the ISO 10791 part list and ISO 230 test code series for complementary tests.

Q: What are the key keywords?

A: Contouring performance, circular test, radial deviation F, circular deviation G, machining centres, telescoping ball bar, probe measurement, ISO 230‑4.