Dimensioning in 3D can be a tricky process in CAD. The UCS (the coordinates system used in 3D model space) has to be manipulated so that dimensions are true to their angle an display properly when viewed in 3D.
Related: AutoCAD 2D and 3D practice drawings Step 1 Create the following circles using CIRCLE command from draw panel of home tab, make sure circle with radius 2.5 units has its center on the circumference of the circle with radius 26 units. This AutoCAD Tutorial is show you how to create 3D house modeling in easy steps, check it out!Watch another videos:AutoCAD tutorial playlist: https://www.you. Check out this awesome FreeCAD tutorial where you can easily learn how to create your first design and bring it to life with 3D printing! No CAD or 3D printing experience required. Sep 06, 2018 AutoCAD and CADkey are among the most common 2D CAD programs in use. Improved computational power and algorithms in the eighties made it possible to incorporate a third dimension into the basic 2D CAD programs and birthed three dimensional or 3D CAD.
Thankfully there’s a real easy solution to this painstaking task in our new Mech-Q release. In both AutoCAD and AViCAD (our AutoCAD alternative) you’ll find a new tool called 3D Dimension. It can be located within a Toolbar we call Piping Extra.
Watch our video below to see how to dimension in 3D using either Mech-Q or AViCAD – our drafting alternative to AutoCAD® or LT®.
3 Steps to creating a 3D Dimension
Now Piping Spools or any 3D object can be dimensioned at any angle using just a few basic steps.
2d To 3d Cad
Step 1
Goto a 3D isometric view. Turn on Center and Node snaps, also turn on Polar Tracking as shown in video above.
The first 2 points need to be aligned and on the same axis. We’ll refer to this as co-linear.
If snapping points to be dimensioned are co-linear – pick just 2 points. Enter the points then press enter (or right click your mouse).
Step 2
If the points are not co-linear then a total of 4 points are entered. The first 2 define the axis (in step 1 above), then the remaining 2 define the actual points to be dimensioned.
Again, simply enter the points then press enter (or right click your mouse) to exit.
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Step 3
Edit the 3D dimension if needed. You’ll have the option to Mirror or Flip the dimensions text, relocate the dimension and more.
A special thanks to Darrell Cook (an avid AViCAD user, teacher and programmer) for this much needed dimension tool.
Want to see more tools like this? Take AViCAD for a test drive today.
Download your copy today !
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Sometimes you don’t have access to a part’s original design documentation from its original production. Reverse engineering empowers you to analyze a physical part and explore how it was originally built to replicate, create variations, or improve on the design. The goal is to ultimately create a new CAD model for use in manufacturing.
![How How](https://www.artpeoplegallery.com/wp-content/uploads/2015/12/jaycee_by_escume.jpg)
While the concept of reverse engineering is quite simple, most people don’t have a good grasp of the step-by-step workflow on how to create CAD from 3D scan data.
What does the reverse engineering workflow look like at a glance?
The first part of the process involves using a 3D scanner to collect the geometric surface measurements of an existing part quickly and accurately. Calipers and hand tools have traditionally been used to take measurements. However, they are often proven limiting when trying to measure complex parts with complicated features (e.g. organic surfaces).
Armed with this intelligence, you can use it to replicate the part or create a new design based on the original. 3D scan data serves as a visual guide for sketching the CAD drawing. It’s pretty much tracing right on top of the scan data. You want to start the CAD drawing with tracing basic 2D sketches along with creating standard relationships and constraints in order to maximize control over how your design is developed. 2D sketches are then converted into 3D features. You continue to build out all the part’s features until the final CAD model is created like the example below.
There’s no magic button for converting a 3D scan data into a usable CAD file automatically. But there is a standardized workflow that makes reverse engineering a straightforward process.
Let’s examine this workflow step-by-step using an example to make our explanation more concrete.
Basic Steps to Reverse Engineering from Scan to CAD
We’ll illustrate the reverse engineering workflow with a rocket nozzle using SOLIDWORKS parametric CAD modeling software and XTract3D add-in. XTract3D allows you to do reverse engineering directly inside SOLIDWORKS.