The following is a detailed guide to using the cad from command.
1. Overview
The CAD From command is an important command in CAD software that allows the user to start from a known base point and determine a new point by specifying an offset. This command is very useful in CAD drawing, which can help users locate points quickly and accurately, and improve drawing efficiency.
2. Command invocation
To invoke the cad from command, you can type "from" or the abbreviation "fro" on your keyboard and press enter. This command can also be entered directly in the command line window.
3. Steps for use
1.Invoke the command: When you need to specify a point while executing other commands, type "from" or "fro" and press enter.
2.Select the base point: AutoCAD prompts you to select a base point. You can use the mouse to select a point on the screen, or enter the coordinates of a point via the keyboard. The selected base point will be used as the reference point for the offset.
3.Enter the offset: After selecting a base point, AutoCAD prompts for an offset. The offset is a relative coordinate that represents the distance and direction between the new point and the base point. You can enter a two-dimensional coordinate (e.g., @10,10) or a polar coordinate (e.g., @10<45). Two-dimensional coordinates represent offsets on the x- and y-axes, while polar coordinates represent distances and angles.
4.Identify new points: Based on the base point and offset, AutoCAD calculates a new point and continues with the current command. You can use the new point as the start or end point of a drawing command, or for other operations that require a point location.
4. Precautions
1.Selection of base points: Choosing a suitable base point is important to accurately determine the location of the new point. Typically, you choose an obvious, known point as the base point, such as the endpoint, midpoint, or center of an object.
2.The input for the offset: The entry of the offset should be done on a case-by-case basis. Make sure that the offset you enter matches the desired distance and direction. You can use a positive number for a right or upward offset, and a negative number for a left or downward offset. For the input of angles, the positive angle represents the counterclockwise direction and the negative angle represents the clockwise direction.
3.Transparency of the commandThe :from command is a transparent command that can be used when executing other commands. This means that after specifying a new point using the from command, the current command will continue to execute without interruption. This feature allows the from command to be seamlessly integrated with other commands to improve drawing efficiency.
4.Shortcuts and aliases: Some CAD software may allow shortcuts or aliases for the FROM command. This can further speed up the invocation of commands and increase productivity. Consult your CAD software's documentation or help file to learn how to set up shortcuts and aliases.
5. Examples
Let's say we want to draw a circle with a radius of 10, the center of the circle is at the top right of a known point, and the offset is 5 units to the right and 3 units up. We can use the from command by following these steps:
1.Invoke the Draw Circle command (e.g. "circle" or "c").
2.When prompted to specify the center of the circle, type "from" and press enter.
3.Select a known point as the base point.
4.Enter the offset "@5,3".
5.Specifies that the radius of the circle is 10.
6.Finish drawing the circle.
With the above steps, we can accurately position the center of the circle at the desired position and draw a circle that meets the requirements.
6. Summary
The CAD From command is a powerful and flexible tool that helps users locate points quickly and accurately in CAD drawings. By selecting the appropriate base point and entering the correct offset, the user can easily determine the new point position and apply the command in a variety of drawing tasks. Proficiency in the use of the FROM command is very important to improve the efficiency of CAD drawing.