Generalities
The design range lets you define the dimensions of product structure elements using the
following ranges:
- Normal range (default range)
- Small range
- Large range
- Extra large range
In
Mechanical Systems Design, the design range defines the accuracy of a geometry
modeling and the tolerance of constraints (engineering connections). It consists of:
- a linear and angular tolerance
- a work area
- design limits
Table 1. Normal Range Values
| Parameter |
Description |
Value |
| Linear Tolerance |
minimal distance between two points below which the points are considered to
coincide |
0.001mm |
| Angular Tolerance |
minimal angle value between two points below which the points are considered
to coincide |
1e-9rad |
| Working area |
area in which precision and tolerance are guaranteed |
1e6mm |
| Minimum Feature Size |
recommended minimum dimension of a feature |
0.1mm |
| Maximum Part Size |
recommended maximum dimension of a part |
10000mm |
The values for the other ranges are the following:
- Small range values = Normal range values / 100
- Large range values = Normal range values *100
- Extra large range values = Large range values *100
Note:
The design range applies to products and representations at their creation, and
you cannot modify it afterward.
Display
To display the appropriate units, the design range uses the following commands and related
functionalities:
- Engineering connections,
- Constraint visualization and related rulers,
- Mechanism player and kinematic rulers,
- Component degrees of freedom,
- Understand mode in B.I. Essentials,
- Smart positioning,
- Free move and constrained move with the Robot.
- Gravity dialog,
- Motors definition dialog box,
- Play parameters dialog box.
Engineering Connections
An engineering connection created to relate components belonging to the
active product inherits of the range of the active product.
An engineering connection created to relate components that do not belong
to the active product (contextual engineering connection), the engineering
connection inherits the range of the first common parent product.
Consequently, under an engineering connection node you can have
engineering connections with different design ranges.
The minimum tolerance detected by the constraint solver is the lower limit
of the range.
Length units for the current range are available and displayed in:
- distance value,
- distance edition,
- fix in space translations,
- constraint visualization in the
3D area.