There are two types of dimensioning we can apply in Part Builder: work plane dimensions and model dimensions. We will look at model dimensioning when we discuss Apply Modifiers. The commands for work plane dimensioning are available on the right click menu of the work plane.

The purpose for applying dimensions in Part Builder is a bit different then then the reason why we apply dimensions in AutoCAD. Dimensions in AutoCAD display measurements. Dimensions in Part Builder are responsible for causing aspects of the part to resize and for defining measurements usually in terms of parameter values. Dimensions can only be applied to AECCU_COL_GEOMETRY objects. The types of dimensions we can define are:

Distance: Defines the distance measurement between any two objects. This measurement can be at any orientation. You will be prompted to select two entities and then the location of the dimension line. The actual measurement from the model will appear in the dimension. If you edit this dimension and change its value, you will cause a size change in the model.

Horizontal Distance: Same as a distance dimension but the dimension is constrained to a horizontal orientation in the work plane. However, unlike the distance dimension, you are prompted for a distance value before the command exits. If you specify a value different than actual, you will cause a size change in the model.

Vertical Distance: Same as a horizontal dimension, but the dimension is constrained to a vertical orientation in the work plane.

Parallel Distance: Defines the distance measurement between any two objects. You will be prompted to select two objects to dimension and then for a reference line. The dimension line will be oriented parallel to the reference line.

Perpendicular Distance: Same as parallel dimension, but the dimension line will be oriented perpendicular to the reference line.

Diameter: Measures the diameter of a circle. The actual measurement from the model will appear in the dimension. If you edit this dimension and change its value, you will cause a size change in the model.

Angle: Measures the angle between two converging lines. You will be prompted to select two lines and the location of the dimension arc. You will then be prompted for the measurement of the angle in degrees before the command exits. If you specify a value different than actual, you will cause a size change in the model. Note, as unusual as this may seem, if the lines do not meet at their endpoints, this dimension may change your geometry.

Next we will see how applying dimensions will benefit our current modeling project.

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