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Building of circles |
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In KOMPAS-3D, it is possible to construct:
•Circle Centerpoint on Object,
•Circle Tangent to Two Curves,
•Circle Tangent to Three curves,
For precise cursor positioning and parameter setting during the construction process, you can use snaps and a geometrical calculator.
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Commands for constructing circles are combined into the group. While executing a group command, you can switch to execution of another one using buttons of the Parameter Toolbar header. You can also transfer any parameters you’ve specified between the commands of a group. Details... |
A circle by center and point is plotted using the Circle 
command.
Step-by-step instructions
1.Set the center of the circle.
2.Set the size of the circle in one of the following ways.
•Select a point lying on a circle.
•Specify the diameter or radius of the circle. To do this, in the group Circle Parameter click the Diameter 
button or Radius 
button and enter the value into the respective field.
After setting the size, a circle is automatically created.
3.To complete operation of the command, click Finish 
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Construction of the circle in the center and point
Additional features when building...
A circle passing through three set points is plotted using the 3 Pts Circle 
command.
Step-by-step instructions
1.Set three points through which the circle must pass. The coordinates of the center of the circle and its radius will be automatically determined.
2.To complete operation of the command, click Finish .
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3 Pts Circle
Additional features when building...
A circle with the center located on the specified curve is plotted using the Circle Centerpoint on Object 
command.
Step-by-step instructions
1.Specify the object on which the center of the circle should lie.
2.Specify the first point through which the created circle should pass.
3.Set the second point of the circle or the diameter/radius of the circle. To set a diameter/radius in the Circle Parameter group, press the Diameter button or Radius button and specify the value in the respective field.
Phantoms of all variants of circles that meet the specified parameters will appear in the graphics area.
4.Fix the required phantom with a mouse click. To fix several phantoms use <Ctrl> key. Details...
After fixing the phantom, a circle is automatically created.
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If it is possible to build only one circle that satisfies the specified parameters, then after specifying the second point (or entering the radius / diameter) a circle is automatically created. |
5.To complete operation of the command, click Finish .
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a) |
b) |
Circles with spline centers:
a) two points (1 and 2) are set for plotting,
b) a point (1) and the circle radius are set for plotting
Additional features when building...
A circle tangent to the specified curve is plotted using the Circle tangent to curve 
command.
Step-by-step instructions
1.Pick the curve that the circle should touch.
2.Determine the parameters of the circle in one of the following ways:
•set two points belonging to the created circle (Fig. a),
•specify the point belonging to the created circle and the radius/diameter of the circle. To set a radius/diameter in the Circle Parameter group, press theDiameter or Radius button and enter the value into the respective field.
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With some combinations of the position of a point on a circle and a radius / diameter value, the construction of a tangent circle is impossible. This is evidenced by the disappearance of the phantom of the circle after entering the radius / diameter value. |
•Set the coordinates of the center of the circle (Fig. b). To do this, enter them in the Center field in the group of elements Coordinates on the Parameter Panel.
After setting the parameters of the circle, phantoms of all the circles that have these parameters and are tangential to the specified curve appear in the graphics area.
3.Fix the required phantom with a mouse click. To fix several phantoms use <Ctrl> key. Details...
After fixing the phantom, a circle is automatically created.
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If it is possible to build only one circle with specified parameters and a tangential to the specified curve, then after setting the parameters, a circle is automatically created. |
4.To complete operation of the command, click Finish .
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a) |
b) |
Circles tangent to the ellipse:
a) two points (1 and 2) are set for plotting,
b) coordinates of the center are set for plotting
Additional features when building...
A circle which has tangency points with two specified curves is plotted using the Circle Tangent to curves 
command.
Step-by-step instructions
1.Pick the curves that the circle should touch. The name will be displayed in the Objects field on the Parameter Panel.
2.Set the point on the circle or the diameter/radius of the circle. To set a diameter/radius in the Circle Parameter group, press the Diameter or Radius button and specify the value in the respective field.
The phantoms of all the circles that have these parameters and are tangential to the specified curves appear in the graphics area.
3.Fix the required phantom with a mouse click. To fix several phantoms use <Ctrl> key. Details...
After fixing the phantom, a circle is automatically created.
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If it is possible to build only one circle that satisfies the specified parameters, then after specifying the point on the curve (or entering the radius / diameter) a circle is automatically created. |
4.To complete operation of the command, click Finish .
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a) |
b) |
Circles tangent to arc and spline:
a) passing through a point, b) equal radii
Additional features when building...
A circle which has tangency points with three specified curves is plotted using the A circle tangent to 3 curves 
command.
Step-by-step instructions
1.Pick the objects that the circle should touch. The name will be displayed in the Objects field on the Parameter Panel.
In the graphics area, the phantoms of all variants of circles tangential to the specified objects are displayed.
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If among the selected objects there is an ellipse or spline, then immediately after selecting the objects, the phantoms of the circles do not appear. The system waits for an indication of the approximate location of the circle. |
2.Fix the required phantom with a mouse click. To fix several phantoms use <Ctrl> key. Details...
After fixing the phantom, a circle is automatically created.
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If it is possible to build only one circle tangential to the specified objects, then after they are specified, a circle is automatically created. |
3.To complete operation of the command, click Finish .
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Circle tangential to two ellipses and a segment
Additional features when building...
A circle passing through two set points is plotted using the 2 Pts Circle command 
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There are two ways to build a circle.
Method 1. By two diametrically opposite points
1.Set the first point of the circle.
2.Set the second point of the circle. It will be diametrically opposite to the first one and determine the size and position of the circle.
After setting the second point, a circle is automatically created.
3.To complete operation of the command, click Finish .
Method 2. By two points and radius/diameter
1.Set the first point of the circle.
2.Specify the diameter/radius of the circle. To do this, in the Circle Parameter group on the Parameter Panel, press the Diameter or Radius button and enter the value into the respective field.
The phantoms of the circles that can be created appear in the graphics area.
3.Set the second point of the circle. Phantoms will take the required position.
4.Fix the required phantom with a mouse click. To fix both phantoms, use the <Ctrl> key. Details...
After fixing the phantom, a circle is automatically created.
5.To complete operation of the command, click Finish .
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Construction of a circle by two points and radius/diameter
