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How to Draw CAD Isometric Drawings Isometric drawings are two-dimensional graphics that reflect the three-dimensional shape of an object. They are full of three-dimensionality and can help people understand the product structure faster and more clearly. Drawing the isometric drawing of a part is done in a two-dimensional plane, which is simpler and more convenient than three-dimensional graphics. There are only three visible planes in the axonometric projection of an entity. In order to facilitate drawing, we use these three planes as the reference planes for drawing lines, finding points, etc., and call them axonometric planes. According to their different positions, they are called left axonometric plane, right axonometric plane and top axonometric plane respectively. When the isometric mode is activated, you can switch between these three planes respectively. For example, the angles between the visible sides of a cuboid and the horizontal line in an isometric view are 30°, 90° and 120° respectively. 1. Activate axonometric projection mode 1. Method 1: Tools-->Sketch settings, snapping and grid-->Snap types and styles: Isometric snap-->OK, activate. 2. Enter at the command prompt: snap-->Style: -->Isometric: i-->Input vertical spacing: 1-->Activation completed. 3. How to switch between isometric surfaces: F5 or CTRL+E switches the upper, right, and left sides in sequence. 2. Drawing straight lines in axonometric projection mode 1. How to draw input coordinate points: ?For the line parallel to the 3.F5: Switch to the top-->Specify a corner point of the top edge-->X direction 10-->Y direction 10-->X direction 10-->C close, as shown in Figure 2. 4.F5: Switch to the right side-->Specify the right corner point of the bottom edge-->Horizontal direction 10-->Up vertical direction 10-->Confirm and complete, as shown in Figure 3 below. 3. Position entities in isometric drawings. To position other known entities in isometric drawings, you must turn on the angle increment in automatic tracking and set the angle to 30 degrees, so that you can start tracking from the known object in the direction of 30°, 90° or 150°. 1. If you want to define a square with a length of 4 on the right side of the square in the above example, then: Capture the right bottom left corner --> X-axis direction: 3-->Vertical direction 4-->Horizontal direction 4--> Lower vertical direction 4-->C is closed, as shown in Figure 1 below. 2. If you want to draw a circle with a diameter of 4 on the top surface, then: F5 switches to the top surface-->Ellipse tool-->Isometric circle: i-->Capture diagonal intersection-->Radius: 2-->Confirm and complete, as shown in Figure 2 below. 1: 4. Drawing parallel lines in the axial plane Drawing parallel lines in the axial plane cannot be done directly with the OFFSET command, because the offset distance in OFFSET is the vertical distance between the two lines, but the distance along the 30° direction is not equal to the vertical distance. In order to avoid operation errors and draw parallel lines in the isometric plane, we generally use the COPY command or the "T" option in OFFSET. ; You can also combine automatic capture, automatic tracking and orthogonal state to draw, which can ensure that the direction of the drawn straight line is consistent with the isometric axis. As shown below, Figure 1 should be drawn in the style of Figure 2 and Figure 3, which can be completed directly by copying. 5. Axonometric projection of an axonometric circle The axonometric projection of a circle is an ellipse. When the circle is located on different axonometric planes, the positions of the long and short axes of the projected ellipse are different. How to operate: Activate Isometric-->Select the projection surface of the circle-->Ellipse tool-->Isometric circle: i-->Specify the center of the circle-->Specify the radius-->Confirm complete. Notice: Before drawing a circle, you must use the surface conversion tool to switch to the axonometric plane corresponding to the plane where the circle is located, so that the ellipse can appear to be within the axonometric plane, otherwise the display will be incorrect. In axonometric drawings, it is often necessary to draw smooth transitions between lines, such as rounded corners. At this time, the transition arc must also be changed into an elliptical arc. The method is: Draw a complete ellipse at the corresponding position, and then use the trim tool to cut off the excess line segments, as shown in Figures 1 to 3 below.: 6. Writing text in an axonometric drawing. In order to make the text in a certain axonometric plane look like it is within the axonometric plane, the text must be tilted at a certain angle according to the position characteristics of each axonometric plane so that their appearance is coordinated with the axonometric drawing. Otherwise, the three-dimensional effect will not be strong. 1. Text tilt angle setting: Format-->Text Style-->Tilt Angle-->Application
Thanks to the original poster ~ Learn* Got it~~~
The poster summed it up very well, practice well* Basic skills thank you
Thanks to the host, Wen* Just took a moment, just what I needed
This is quite useful, learn from it* It's really hard for CAD not to remember these things.
Thanks! That sums it up very well. Worth learning * .
The summary is very good and in place, thank you for sharing. Improve together and make progress together!
Haha, many people have been drawing pipeline isometric drawings for many years, but they still don’t know that this function exists. . . However, the domestic water supply and drainage industry * Is there no convenient method in CAD for the 45-degree oblique survey that I am used to?
Thanks for sharing lz, I posted it directly and saved money, haha