Parametric Design in AutoCAD Part 4: Parameters Manager

Now we'll get to the real advantages of parametric design. You may write math formulas into your dimensions to drive your design with only a few parameters.

Hidden user variables can control the values of multiple dimensions in the design.

Check out the VIDEO

If you interested in a really powerful example of parametric expressions then check out my post on Autodesk Inventor, Math Rules!

Blogged by Josh Hunt, Yet another CAD Geek

Using Parameters in iProperties

More recently I have seen a large demand to customize the information within iProperties. One great way to do this is take advantage of the expressions that can be created in iProperties using either other iProperties or parameter values that have been created during the modeling process. Using Parameter values in expressions in iProperties can allow a user to automate such common iProperties such as description. The keys to doing this successfully are to carefully name your parameters ( User Parameters work best), export those parameters so that they will be shown on the custom tab of the iProperties, and create the correct expression. There is a simple example here in the video to get you started.


Added by Rodney, another one of those CAD Geeks.

Math Rules!

iParts can be a great way to simplify your parts library. However, I constantly hear that it's pain to remember which features to suppress for each configuration. My answer is to create rules with math.


We can write equations that provide values and then suppress the features based on those values. There are hundreds of ways to use these but I want to stress that sometimes this can get too complex. That is when you want to look into iLogic or Inventor Automation.


Created by Josh, Yet another CAD Geek
Props to my friend (and CAD Geek) Chris Weitzel for collaborating on these equations.

Wire Tags AutoCAD Electrical

When configuring your AutoCAD Electrical one area that can be confusing is setting up your wire tag information so that all your wire numbers read the way you want them too. First thing first is where do we configure your wire tags. This can be accomplished in two areas the first being under the properties for a given project or you can do this by a sheet by sheet basis when selecting the drawing properties. Just remember the %N must always be part of the wire format string. Below is a little cheat sheet to help better understand what parameters you have to work with.



Let's take a look


Created by Dave one of the Cad Geeks

I've Found The Missing "LINK"


While doing some work with one of my customers this week, I helped them to simplify how they go about editing a design to create a new version.

We began using parameters in their parts and then add the functionality of linked parameters across other parts.


The process is really simple to use and can reduce your need to open every file to make changes.

Enjoy,
Jim.......Another INCAT CAD Geek!

Basic Model Tolerances when Fractions Count




Back in the days when I was in the design industry, we made some pretty tight tolerance parts.

Most of the time when people model up parts in 3D they do it in a nominal dimension form.

This is not a bad way to work at all, but you can model using the manufacturing tolerances right in the sketches of your parts.
By doing this you can validate your parts based on the different material conditions of the part.


Enjoy,
Jim.............Another INCAT CAD Geek

Making Your Parts More Intelligent

So you maybe you have mastered creating iParts and iFeatures, but we can take those items one step farther adding in some operators to make them even more intelligent. I am going to take a very simple example and create intelligence that will work with the dynamic geometry of a part. Allowing to have suppression of a feature due to a size change in a model.








Why is this important?
As iParts and iFeatures increase and decrease in size you may want to suppress or un-suppress other features so that they fit. One example could be that you have a plate 4 inches long with 3 one inch holes in it with equal spacing; you may want a hole to disappear if that plate ever gets shorter than a given length. Working with parameters will allow this to happen automatically.
Check it out
Submitted by Dave of the INCAT CAD Geeks

FEA (Found Extra Additional stuff)

While working with the FEA portion of Inventor Professional recently, I found some additional workflows that may be a time saver for those performing calculations and edits.
1) Edit geometry while in the context of the FEA application.
My old workflow was to switch back to the part environment to make edits to my model. You can access your features by expanding the browser, right clicking on faces to create new sketches, heck, you can even double click and use 3D grips!
2) Export results of FEA.
Yes I know there is the "Report" button that exports all the results in an html format, but what if I want some of that data connected to my drawings or accessable in my models? After running the simulation, click on the paramaters button. Here you can choose some results such as min. and max Safety Factor and the numbers you used and output them to the part iProperties.

Check It Out Here