ISO 11090-1:2014

Overview

ISO 11090-1:2014 - Test conditions for die sinking electro-discharge machines (die sinking EDM) - Part 1: Single-column machines (cross‑slide table type and fixed‑table type) defines standardized methods to verify the geometric accuracy, positioning accuracy and repeatability of single‑column die sinking EDMs. With direct references to ISO 230‑1 and ISO 230‑2, this part covers geometric and machining tests, the applicable tolerances and the terminology and axis designation (per ISO 841:2001). It deals only with accuracy verification - not machine operation characteristics such as vibration, abnormal noise or feed/speed performance.

Key Topics and Requirements

• Scope: Applies to normal‑accuracy and general‑purpose single‑column die sinking EDMs (cross‑slide table and fixed‑table types).
• Geometric tests: Standardized checks (G1–G12) for straightness, flatness, squareness, parallelism and other geometric errors of linear axes and machine components. Example: G1 straightness of the X‑axis has a tolerance example of 0.010 mm over a 500 mm measuring length.
• Positioning tests: Tests P1–P4 for accuracy and repeatability of numerically controlled (NC/CNC) positioning axes, referenced to ISO 230‑2 for methods and interpretation.
• Machining test: Finishing‑condition machining trials to confirm real‑world process accuracy.
• Measurement practices: Use of linear displacement sensors, straightness artefacts and optical instruments; units in millimetres; minimum tolerance floor of 0.005 mm when scaling tolerances.
• Software compensation: Allowed only by agreement between supplier and user and must be declared in test reports; axes must not be locked when compensation is used.
• Terminology: Axis designation and principal component names included; Annex A provides equivalent terms in several additional languages (informative).

Practical Applications & Who Uses It

• Machine tool manufacturers - to demonstrate conformance of single‑column die sinking EDMs at delivery.
• Procurement and acceptance testing teams - to specify and verify machine accuracy when purchasing equipment.
• Quality, metrology and test laboratories - for standardized accuracy testing, calibration and reporting.
• Toolmaking, mold and die shops - to ensure EDM equipment meets dimensional and process requirements for high‑precision cavities and electrodes.

Related Standards

• ISO 230‑1:2012 - Geometric accuracy of machine tools (installation, measuring methods)
• ISO 230‑2:2014 - Accuracy and repeatability of NC axes (testing procedures)
• ISO 841:2001 - Designation of machine tool axes
• ISO 11090‑2 - Part 2: Double‑column machines (slide‑head type)

Keywords: ISO 11090‑1:2014, die sinking EDM, die sinking electro‑discharge machines, accuracy testing, geometric tests, positioning tests, single‑column EDM, cross‑slide table, fixed‑table, tolerances, ISO 230.