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SM25 modules and SH25 stylus holders – repeatability when changing using FCR25
Module / body joint
For this test the module was fitted with the longest permissible stylus for a worst case scenario. The repeatability of the sphere centre position, using FCR25 to change modules, is shown below:
| SM25-1 | SM25-2 | SM25-3 | |
| X (±2σ) | ± 0.48 µm | ± 0.42 µm | ± 0.60 µm |
| Y (±2σ) | ± 1.38 µm | ± 0.88 µm | ± 1.52 µm |
| Z (±2σ) | ± 0.94 µm | ± 0.72 µm | ± 1.40 µm |
Module / stylus holder
The repeatability of the stylus holder joints has been estimated as the repeatability of the centre position of a sphere measured with 5 points.
| SH25-1 | SH25-2 | SH25-3 | |
| X (±2σ) | ± 0.32 µm | ± 0.34 µm | ± 0.45 µm |
| Y (±2σ) | ± 0.34 µm | ± 0.38 µm | ± 0.9 µm |
| Z (±2σ) | ± 0.45 µm | ± 0.39 µm | ± 0.54 µm |
Requirements
No additional requirements.