What do the arc start angles and end angles of CAD mean?

In the process of drawing with Haochen CAD drawing software, sometimes for the needs of actual use or processing, there will be small bevels or rounded corners at the corners or connections of many parts and equipment, and rounded corners and chamfers can be seen everywhere in the design drawings, especially in the mechanical design drawings. Next, I will share with you the skills of using the rounded corners of Haochen CAD introductory learning tutorial!

Tutorial on the use of rounded corners in CAD:

1. First of all, open Haochen CAD drawing software, and then click the [Rounded Corners] button, or enter F to press Enter to start the [Rounded Corners] function.

In the command prompt given by Haochen CAD, there are two options that need special attention, one is [Radius (R)], which is the radius of the fillet and is the most important parameter of the fillet operation; The other is Multiple (M), which, if selected, allows multiple rounds to be performed consecutively, otherwise only once by default.

2. After entering r and press enter, the command line will prompt you to enter the corner radius, as shown in the figure below. Enter and press enter at this point.

3. After selecting line 1 and line 2 in the following figure, CAD will automatically process the intersection of the two straight lines as fillets. The final rounded corner effect is shown in the image below. If you selected the Multiple (M) option in step 2, you can perform multiple rounded operations in a row.

You can think of it this way, you draw a cross in CAD: up, north, down, south, left, west, right, east. The industry stipulates that "East" is 0° (360°), "North" is 90°, "West" is 180°, and "South" is 270°.

For example, if you draw an arc based on "East" and the intersection point of the circle is the center of the circle, if the starting point of the arc is set at "North", then the starting point is 90° away from "East", which is called the starting angle of the arc is 90°.

Continue to draw the arc until the end point is "west", and the end point is 180° from "east", which is called the end angle of 180°.

Remember that the angle is calculated based on "east".

CAD Draw Any Angle Method:1. Polar tracking method.

1. First open CAD, right-click the polar tracking icon at the bottom of the interface, and select Settings.

2. Check Enable polar tracking in the pop-up sketch settings, then click New in the Additional Angle, enter the angle you want to track, here create 0 degrees and 30 degrees, and finally confirm.

3. After setting the polar axis tracking, the polar axis will be out every 30 degrees when drawing the line, and it is easy to draw the angle, and the setting method for drawing other angles is the same.

4. Mark the angle after drawing.

2. Command line method: first draw a horizontal line as a reference, and then use the line tool to click the first point and enter it in the command line.

There are three ways to draw an arc at any angle:

starting point, endpoint, angle;

starting point, center of circle, angle;

The center of the circle, the starting point, the angle.

In addition, polylines can also be drawn.

The rounded corners CAD drawing method is as follows:

Operating Equipment: Dell Inspiron 7400

Operating system: win10

Operating software: CAD software 2017

<>7. Then press the spacebar (repeat the above command), the mouse will turn into a small square, and select other straight lines respectively, according to this operation, the remaining two Zen hunger corners will also become rounded corners, as shown in the figure.

In the process of drawing with CAD, we sometimes need to draw the corresponding arc according to a specified angle, so how to do it?

Let's learn with me.

Method 1: 1. First of all, the big judge Sun Yinjia opened the ZWCAD software.

2. Use the "circle" function of the software drawing function to draw a circle with a radius of r, and then use the "straight line" function to draw a horizontal straight line through the center of the circle.

3. Click the "Modify" option in the top menu bar and find the "Rotate" function in the pop-up dialog box.

4. Click "Rotate", the cursor is square at this time, click the left mouse button on the horizontal line to select the object, click the right mouse button, and select the center of the circle as the specified base point.

5. Then right-click and click the "Kaixi Copy" option in the pop-up dialog box.

6. Rotate the corresponding angle according to the specified angle, and click the left mouse button to confirm.

7. Then find the "Trim" function in the "Modify" option in the menu bar.

8. Finally, click "Trim" and remove the excess arcs and straight lines to get the arc drawn at the specified angle.

Method 2: In addition to the above methods, CAD can also directly use the drawing function of the menu bar to draw the corresponding arc at a specified angle.

Here's how:

1. Open ZWCAD software, select "Draw Excavation Banquet Diagram - Arc" in the top menu bar, and there is a drawing method in the pop-up dialog box.

2. Draw an arc according to the specified angle, you can choose the following three options.

Starting point, center of circle, angle (t).

Start, End, Angle (n).

Center of the circle, starting point, angle (e).

The steps for CAD fillet operation are as follows:Operating environment: HP OMEN 5, Windows 10 system, AutoCAD 2021 version, etc.

1. First of all, enter the CAD interface and click "Start Drawing" template.

2. Enter the CAD design interface.

3. The promotion order of the rounded life boy can be found and recalled in the "Modify" option in the menu bar, or you can call up the command by entering "fillet" on the command line.

4. Draw a figure that needs to be rounded.

5. Click "Fillet Corner" in the "Modify" panel to bring up the fillet command, enter "R", and then enter the required fillet to roll the old radius. Here take 60 as an example, and then follow the prompts to select the object, and after the selection, it will automatically become rounded.

6. CAD graphics can complete the rounded corner operation.

Here's how to do CAD fillet work:Tools: ASUS Tianxuan 2, imitation of Windows 10, Auto CAD2023.

1. After entering the CAD software, use the tool to draw an ordinary angle composed of two straight lines.

2. Click the command box below the area and enter f, or you can directly click the rounded corner tool in the ribbon.

3. Enter R (radius) in the input box and press the spacebar, then enter the radius of the fillet.

4. Press the spacebar again and use the mouse to select the two straight edges of the normal corner in turn.

Introduction to CAD softwareAutoCAD (Autodesk Computer Aided Design) is an automatic computer-aided design software first developed by Autodesk in 1982, which is used for 2D drawing, detailed drawing, design documentation and basic 3D design, and has now become a widely popular drawing tool in the world.

AutoCAD has a good user interface, and various operations can be performed through interactive menus or command lines. Its multi-document design environment makes it easy for non-computer professionals to learn to use it quickly. In the process of continuous practice, we can better master its various application and development skills, so as to continuously improve work efficiency.

AutoCAD has a wide range of adaptability, and it can run on microcomputers and work stations supported by various operating systems.