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There are some methods that seem to allow you define an arc length. For example; start, center, length. But this is defining the chord length, not the arch length. Calculating the angle using simple mathematics calculation, comparing the arch radius... Read More

Actions define how the geometry of a dynamic block reference will move or change when the custom properties of the block reference are manipulated in a drawing. Move: Move action causes objects to move a specified distance and angle such as a point,... Read More

Parameters have an appearance similar to dimensions. Parameters also specify positions, distances, and angles for geometry in block reference. When you add a parameter to a dynamic block definition, the parameter defines one or more custom properties... Read More

If you want to realize symmetric stretch keeping keyway center no change and the length of smaller diameter shaft changes with stretch at same time, how will realize that? 1. Add Stretch for Step Shaft: Add stretch parameter and action for step shaft... Read More

Take step shaft as an example, if we stretch the left part of the step shaft and the keyway still is at the center point of smaller diameter shaft after stretching. As the following picture shows: Then, we use “Distance Multiplier” property of... Read More

 There is an easy way to realize the two-way stretch which is adding two stretch actions. Though it can realize two-way stretch, the action of stretch is independent. The parameter needs some additional setup to realize the two-way symmetrical... Read More

For mechanical design, we often need stretch the keyway to a certain length. Now, let us see how to realize the accurate stretch. 1. Pick Linear Parameter: In block editor, pick the linear parameter, then click entry frame which is in the right... Read More

Alignment Parameter can give dynamic blocks the function of alignment automatically, which can save the step of rotating the blocks. 1. Add an Alignment Parameter for a Roughness Symbol: Draw a roughness symbol in the Block Editor. Select... Read More

You can use many commands transparently like pan, zoom, setvar, about, help, OSNAP, CAL, color, etc. You can enter them on the command line while another command is active. To use a command transparently, enter an apostrophe (') before entering... Read More

As a new or experience CAD user, you might found that GstarCAD has a lot of commands. Not to mention changing the system variables. Some (well, many...) of them have to be activated from command line. It is very difficult to remember all of them.... Read More