Overview
ISO 10791-10:2022 - Test conditions for machining centres - Part 10: Evaluation of thermal distortions - specifies standardized tests to evaluate the thermal behavior of machining centres and their positioning systems. It applies to machining centres with vertical and horizontal spindles with defined maximum linear axis lengths (e.g., X up to 5 000 mm; Y and Z limits per spindle orientation are stated in the scope). The document is intended for comparison, acceptance, maintenance and performance verification and is designed to be used together with ISO 230-3.
Keywords: ISO 10791-10:2022, thermal distortions, machining centres, machining center testing, machine tool thermal tests
Key topics and technical requirements
- Scope and machine types: Vertical-spindle machines with numerically controlled linear axes (X up to 5 000 mm; Y/Z up to 2 000 mm) and horizontal-spindle variants (X up to 5 000 mm; Y up to 3 200 mm; Z up to 2 000 mm).
- Four standardized thermal tests:
- T1 - Environmental temperature variation error (ETVE): evaluates effect of ambient temperature changes on machine geometry.
- T2 - Thermal distortion caused by a rotating spindle: measures thermally induced errors while the spindle runs (test duration specified: 4 h running + 1 h stopped).
- T3 - Thermal distortion caused by moving linear axes: evaluates errors produced by axis motion and heating.
- T4 - Thermal distortion caused by rotary motion of components: newly added in the 2022 revision.
- Measurement elements and instruments: examples include ambient and bearing temperature sensors, linear displacement sensors and a test mandrel. Linear dimensions are expressed in millimetres and temperatures in °C.
- Test procedure principles: machines should be thermally equilibrated before tests; tests can be run individually or combined; software compensation and thermal error compensation may be used but must be reported.
- Reporting and data: requires graphical and numerical presentation of results and documentation of machine identity, sensor locations, test setup, spindle speed regime, and any compensation used.
- No fixed numerical tolerances: numerical acceptance criteria are to be agreed between user and supplier.
Practical applications and who uses it
- Machine tool manufacturers - design validation, production acceptance and warranty testing.
- OEMs and production engineers - selection and acceptance of machining centres for thermal stability in production environments.
- Metrology and test laboratories - standardized test sequences for comparison and certification.
- Maintenance and quality assurance teams - troubleshooting, periodic re‑qualification and validation of thermal compensation strategies.
Practical benefits include improved process stability, informed machine purchase decisions, and a repeatable basis for thermal compensation and predictive maintenance.
Related standards
- ISO 230-3:2020 - Determination of thermal effects (normative reference and required companion document).
- ISO 230-1:2012 - Geometric accuracy of machines under no-load/quasi-static conditions (terms and definitions).
For implementation, follow ISO 10791-10:2022 together with ISO 230-3 for measurement methods, presentation of results and installation prerequisites.
Open preview (PDF)Test conditions for machining centres — Part 10: Evaluation of thermal distortions
