Calibration standards are high precision measuring tools, used together with optical and photoelectronic microscopes to determine and compare length measurements.
Calibration standards are directly applied to:
- Machine Tools and operating machines;
- Measuring devices.
To the purpose of:
- Verifying the precision of the positioning, as guaranteed by present electronic measuring systems;
- Automatically testing and protocolling the movement of operating axes;
- Placing and applying measuring scales – (magnetic, photoelectrical, racks) with the highest precision.
F.lli Rotondi’s product has the following specifications:
Material:
- Hardened special martensitic stainless steel
- Hardness 300/340 HB
- Dilation ratio 11.5×10^-6/ °C
Processing:
- H-profile, with graduation set on the section’s neutral axis, where stress is nil;
- Mirror-honed graduation surface
- Rugosity of the graduated surface: Ra = 0.005 µm
- Planarity of the graduated surface: 0,01 mm (sui punti Bessel)
Division:
- Each millimeter
- Graduation on high-precision graduating machines, working at 20 °C +- 0.1 °C, on shock-absorbing stands.
- Mark width: 5 µm, 10 µm, 20 µm
- Mechanical graduation : diamond tools
- Chemical graduation: photoengraving
- Graduation length: 500, 1000, 1500 mm
Precision:
- Graduation tolerance (referring to zero): +/- 2 µm, +/- 3 µm, +/- 4 µm
Numbering:
- Precision Photoengraving at 20° C on each mark
Testing:
- Values refer to zero
- Executed on a high-precision control bench at 20° C +/- 0,1° , on shock-absorbing stands.
- Readings through photoelectronic microscope, with elimination of system errors such as pointing, reading, focal distance
- Speed reading, leading to a reduction in mistakes due to instability or temperature variations
- Readings every 5 o 10 mm
- Reading resolution 0,1 µm
- Collimation precision between mark and reticle +/- 0.01 µm
- Testing and relative protocols can be executed in International laboratories upon request.
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