? ? ? ? ? ? ? ?
三点成面Through three points 两线成面Through two lines 点与直线成面Through Point and line 过平面曲线Through Planar Curve 与线垂直Normal To Curve 与曲面相切Tangent to Surface 方程式Equation（Ax+By+Cz=D） 多点的平均面Mean Through Points
5.11 Advanced Replication Tools工具栏
PowerCopy的用途在于将一群相关的特征组成一个集合，这个集合可以用在不同的零件文件中。PowerCopy能进一步修改每一个特征的值，并采用参数化设计的概念，比起样本只能单纯复制特征，PowerCopy的功能更为强大。
1. PowerCopy命令
2. Instantiate From Document命令
5.12坐标轴系统Axis System
This task explains how to define a new three-axis system locally. There are two ways of defining it: either by selecting geometry or by entering coordinates.
1. Select the Insert -> Axis System... command or click the Axis System icon . The Axis System Definition dialog box is displayed.
注意：选择对话框中的“Current”按钮，则当前建立的坐标系为当前坐标系。
2. An axis system is composed of an origin point and three orthogonal axes. For instance, you can start by selecting the vertex as shown to position the origin of the axis system you wish to create. The application then computes the remaining coordinates. Both computed axes are
then parallel to those of the current system.一个坐标轴系统是由一个原点和三条直
角轴组成。例如，可以选择一个顶点作为所希望建立坐标轴系统的的原点，则系统自动计算其余的坐标轴，缺省的是所计算的轴与当前系统的坐标轴平行。
I. 原点Origin
Instead of selecting the geometry to define the origin point, you can use one of the following contextual commands available from the Origin field:
? Create Point: for more information, refer to Points
? ? ?
Coordinates: for more information, refer to Points
Create Midpoint: the origin point is the midpoint detected by the application after selection of a geometrical element. Create Endpoint: the origin point is the endpoint detected by the application after selection of a geometrical element
II. 坐标轴系统类型Axis System Type
You can choose from different types of axis system:
? Standard: defined by a point
of origin and three orthogonal directions (by default the current directions of the ccompass).通过一个原点和三条
直角方向（缺省与指南针方向相同）
Here only the point was selected and nothing specified for the axes.在这里，只
选择了一个点，没有指定轴。
? Axis rotation: defined as a standard axis system and a angle
computed from a selected
reference.定义方式如同标准轴系统（Standard Axis System），并且利用一个选定的参考来计算一个角度。
Here the Y axis was set to the standard axis system Y axis, and a 15 degrees angle was set in relation to an edge parallel to the X axis. 这里Y轴的设置方式如同标准轴系统Y轴
的设置方式，15度表示绕X轴转动的角度。
（操作方式：选定一轴；然后选定过此轴的面作为参考；在设定围绕此轴的转角即可。）
? Euler angles: defined by three
angle values as follows.
Angle 1= (X, N) a rotation about Z
transforming vector X into vector N. Angle 2= (Z, W)
a rotation about vector N transforming
vector Z into vector W. Angle 3= (N, U)
a rotation about vector W.
3．If you are not satisfied with x axis, for instance click the X axis field and select the edge as shown to define a new direction for x axis. The x axis becomes colinear with this edge.
4．Check the Reverse option to reverse the x axis direction. Clicking the axis reverses its direction too.
Note that there are two types of axis systems, right-handed and left-handed. The dialog box indicates the type close to the Current option.
5．The application also lets you define axes through coordinates.
Right-click the Y Axis field and select the Coordinates... contextual command. The Y Axis dialog box appears.
6．完成原点与坐标轴的建立之后，点击OK。
The axis system is created. It is displayed in the specification tree. When it is set as current, it is highlighted as shown below.（当它设置为当前坐标系的话，它在树中显示的亮的。）
设置的局部坐标系时固定的，如果项约束它，则先要使它与系统的其它要素隔离开，否则会过约束。（Local axes are fixed. If you wish to constrain them, you need to isolate them (using
Isolate隔离 contextual command) before setting constraints otherwise（否则） you would obtain over-constrained systems.）
The display mode of the axes is different depending on whether the three-axis system is right-handed or left-handed and current or not.
Right-click Axis System.1 and select the Set as current contextual command. Axis System.1 is now current. You can then select plane xy for instance, to define a sketch plane.
III. 编辑一个坐标系统Editing an Axis System
You can edit your axis system by double-clicking it and entering new values in the dialog box that appears. You can also use the compass to edit your axis system. For more about the compass, refer to CATIA- Infrastructure User's guide Version 5.
Note also that editing the geometrical elements selected for defining the axes or the origin point affects the definition of the axis system accordingly.
Right-clicking Axis System.X object in the specification tree lets you access the following contextual commands:
? Definition...:redefines the axis system
? Isolate: sets the axis system apart （分开）from the geometry
? Set as Current/Set as not Current: defines whether the axis system
is the reference or not.
IV. Creating an Axis System when Creating a New Part
An option lets you create an axis system when you are creating a new part. To know how to access this option, refer to Customizing a CATPart document.