Description – The minimum diameter of a cylinder that fully contains a specified line.
Required Parameters
Optional Parameters
- StartPointX – Start Point on the X-Axis distance from the reference
- EndPointX – End Point on the X-Axis distance from the reference
- StartPointY – Start Point on the Y-Axis distance from the reference
- EndPointY – End Point on the Y-Axis distance from the reference
- NumberOfPoints –
- Reference – DIN, ISO, ASTM, ASME, or Federal G-Series Measurement Specifications [plain text]
Measured Value & Uncertainty
Description – Sphericity is a measure of how closely the shape of an object resembles that of a perfect sphere. For example, the sphericity of the balls inside a ball bearing determines the quality of the bearing, such as the load it can bear or the speed at which it can turn without failing. Sphericity is a specific example of a compactness measure of a shape. Defined by Wadell in 1935,[1] the sphericity, {\displaystyle \Psi }\Psi , of a particle is the ratio of the surface area of a sphere with the same volume as the given particle to the surface area of the particle: where {\displaystyle V_{p}}V_p is volume of the particle and {\displaystyle A_{p}}A_p is the surface area of the particle. The sphericity of a sphere is unity by definition and, by the isoperimetric inequality, any particle which is not a sphere will have sphericity less than 1.
Sphericity applies in three dimensions; its analogue in two dimensions, such as the cross sectional circles along a cylindrical object such as a shaft, is called roundness.
Required Parameters
Optional Parameters
- Height – above turntable
- NumberOfPoints –
- StartAngle – Rotational Angle from reference
- StopAngle -Rotational Angle from reference
- Reference – DIN, ISO, ASTM, ASME, or Federal G-Series Measurement Specifications [plain text]
Measured Value & Uncertainty
Description – Perpendicularity is a fairly common symbol that requires the referenced surface or line to be perpendicular or 90° from a datum surface or line. Perpendicularity can reference a 2D line, but more commonly it describes the orientation of one surface plane perpendicular to another datum plane.
Required Parameters
- Distance – Maximum dimension of surface or axis
Optional Parameters
- Axis – the surface
- StartPointX – Start Point on the X-Axis distance from the reference
- EndPointX – End Point on the X-Axis distance from the reference
- StartPointY – Start Point on the Y-Axis distance from the reference
- EndPointY – End Point on the Y-Axis distance from the reference
- Resolution – Distance between points
- Reference – DIN, ISO, ASTM, ASME, or Federal G-Series Measurement Specifications [plain text]
Measured Value & Uncertainty
Description – Roundness is the feature described as deviation (radial error) from true roundness (mathematically, a circle).
Required Parameters
Optional Parameters
- Height – above turntable
- NumberOfPoints –
- StartAngle – Rotational Angle from reference
- StopAngle -Rotational Angle from reference
- Reference – DIN, ISO, ASTM, ASME, or Federal G-Series Measurement Specifications [plain text]
Measured Value & Uncertainty
Description – 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
Required Parameters
- Roughness – {Ra, Rq (RMS), Rv, Rp, Rz}
Optional Parameters
- StartPointX – Start Point on the X-Axis distance from the reference
- EndPointX – End Point on the X-Axis distance from the reference
- StartPointY – Start Point on the Y-Axis distance from the reference (for areal roughness only)
- EndPointY – End Point on the Y-Axis distance from the reference (for areal roughness only)
- Evaluation Method – ({Ra, Rq (RMS), Rv, Rp, Rz})
- Resolution – x-y distance between points
- Reference – DIN, ISO, ASTM, ASME, or Federal G-Series Measurement Specifications [plain text]
Measured Value & Uncertainty
Description – The minimum normal (perpendicular) distance between two parallel planes that fully contain a surface. Commonly, the two parallel planes may be constructed from the surface itself (in which the highest point and lowest point of the surface would be tangent to the two parallel planes), but a drawing may specify how the parallel planes should be constructed.
Reference
https://www.gdandtbasics.com/flatness/
Dimensioning and Tolerancing, Engineering Product Definition and Related Documentation Practices, ASME Y14.5-2018 https://www.asme.org/codes-standards/find-codes-standards/y14-5-dimensioning-tolerancing
Required Parameters
- Longest dimension in the surface of interest
Optional Parameters
- StartPointX – Start Point on the X-Axis distance from the reference
- EndPointX – End Point on the X-Axis distance from the reference
- StartPointY – Start Point on the Y-Axis distance from the reference
- EndPointY – End Point on the Y-Axis distance from the reference
- Resolution – x-y distance between points
- MeasurementDescription – DIN, ISO, ASTM, ASME, or Federal G-Series Measurement Specifications [plain text]
- Reference – DIN, ISO, ASTM, ASME, or Federal G-Series Measurement Specifications [plain text]
Measured Value & Uncertainty
Description – Length Radius commonly thought of as half the diameter of a full circle, the radius is the distance from the center point to the edge of an arc or partial circle.
Required Parameters
Optional Parameters
- Type – {Inside, Outside}
- Position – Where is it being measured? [plain text]
- Reference – DIN, ISO, ASTM, ASME, or Federal G-Series Measurement Specifications [plain text]
Measured Value & Uncertainty
Description – Length Circumference is the length measured around the inside or outside of a round or circular object.
Required Parameters
Optional Parameters
- Type – {Inside, Outside}
- Position – Where is it being measured? [plain text]
- Reference – DIN, ISO, ASTM, ASME, or Federal G-Series Measurement Specifications [plain text]
Measured Value & Uncertainty
Description – Length Diameter is the edge-to-edge straight-line distance passing through the center of a circular object. It can measure the inside open space or outside diameter of the object.
Required Parameters
Optional Parameters
- Type – {Inside, Outside}
- Position – Where is it being measured? [plain text]
- Reference – DIN, ISO, ASTM, ASME, or Federal G-Series Measurement Specifications [plain text]
Measured Value & Uncertainty
Description – Length is the straight-line distance between two points. It can be measured in one, two, or three dimensions with 6 degrees of freedom.
Length measurements are made from Point 1 to Point 2 based on the reference definition of an ISO or ASME standard datum specifically defining the orientation and references for each of the x,y,z points. The start and end points allow defining and distinguishing direction if required; otherwise, they are interchangeable.
Required Parameters
Optional Parameters
- StartPointX – Start Point on the X-Axis distance from the reference
- EndPointX – End Point on the X-Axis distance from the reference
- StartPointY – Start Point on the Y-Axis distance from the reference
- EndPointY – End Point on the Y-Axis distance from the reference
- StartPointZ – Start Point on the Z-Axis distance from the reference
- EndPointZ – End Point on the Z-Axis distance from the reference
- Reference – ISO- or ASME-compliant datum drawing specification (or equivalent unambiguous specification) [plain text]
Measured Value & Uncertainty
