Measure.Length.Form.Roughness

MeasureDimensional

Roughness is the measure of the finer surface irregularities in the surface texture (texture comprises roughness, waviness, and form), either along a profile (line) or across a surface. Form is a long spatial wavelength, or the overall “shape” of the surface. Waviness is a shorter spatial wavelength, such as an undulation in the shape. Roughness is the shortest spatial wavelength of the surface irregularities. These surface irregularities are results of the manufacturing process employed to create the surface. Roughness is measured, using a numerical parameter, which is a description of the overall roughness of the surface. Roughness average (Ra), sometimes previously known as arithmetic average (AA) or (CLA), both now deprecated,, is the rated as then the is a parameter, calculated as the arithmetic mean deviation of the surface valleys and peaks. Units used are typically in micrometers or microinches. Reference https://www.engineersedge.com/surface_finish.htm https://en.wikipedia.org/wiki/Surface_roughness ASME B46.1.2019

Result

Name	Quantity	m-layer aspect
Roughness	length	length (AS3)

Parameters

Parameter	Required	Quantity	m-layer aspect	Definition or allowed values
Roughness	Required	—	—	{Ra, Rq (RMS), Rv, Rp, Rz}
StartPointX	Optional	length	length (AS3)	Start Point on the X-Axis distance from the reference
StartPointY	Optional	length	length (AS3)	Start Point on the Y-Axis distance from the reference
EndPointY	Optional	length	length (AS3)	End Point on the Y-Axis distance from the reference
EndPointX	Optional	length	length (AS3)	End Point on the X-Axis distance from the reference
EvaluationMethod	Optional	—	—	({Ra, Rq (RMS), Rv, Rp, Rz})
Resolution	Optional	length	length (AS3)	x-y distance between points
Reference	Optional	—	—	DIN, ISO, ASTM, ASME, or Federal G-Series Measurement Specifications [plain text]

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