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CAD tip CAD tip # 13185:

Question CAD 
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Q - question

Constraining object movement to a specified curve (rail) in AutoCAD.

A - answer n AutoCAD, you can use parametric geometric constraints, specifically the Coincidency constraint (GCCOINCIDENT) to bind a specified object point to a selected curve. So you can force the object to move only along a trajectory that follows the specified control curve (line, spline, arc, etc.).

Only 2D geometry can be used for control curves. You do not need to use just an offered point on the object geometry to specify the constraint point, but you can also use any osnap point - e.g. the center of a circle, the insertion point of a block, etc. It is advisable to anchor the control curve in advance (the Fixed constraint, GCFIX).

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100% *  CAD 
10.1.2022    23823×  
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applies to: AutoCAD ·

See also:
Tip 14098:How to use arc length parameter in Inventor sketch?
Tip 14088:3 methods of creating true rectangles in AutoCAD.
Tip 13788:Green square - mathematical charade and parametric constraints in AutoCAD.
Tip 12755:How to create a polyline with multi-colored segments?
Tip 12046:Random shape and appearance of an Inventor part or assembly.

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