3D Modeling Techniques 
ZW3D vs Solidworks Lesson Thirteen
Primitive Shape Design
Streamlined Sketching/Feature Based Modeling

Modeling note:

It is funny, you may not realize how you model because you have many ingrained processes from the past. I have been doing Boolean (direct edit) design since the beginning of solid modeling in CAD. As I have been doing these comparisons I realized that I design in shapes. ZW3D has primitive shapes and robust direct edit functionality. I look at the drawing and pick out the basic shapes of the part instead of creating a sketch. You can see that in this part.

I saw some Fusion 360 exercises online and I decided to compare ZW3D. It quickly turned into a study in modeling techniques. I have created many comparisons to Fusion 360, Onshape, Solid Edge, NX, Creo, Catia and Inventor lessons to show the difference between ZW3D and my modeling techniques. I found the presenters working identically wasting massive amounts of time with overly complex constrained sketching procedures. I was so unimpressed that I decided to model the parts or assemblies showing my modeling techniques plus 's superb design system.

3D Modeling Techniques Defined

Many of these modeling techniques can easily be implemented even within their existing system. I call it Streamlined Sketching and Feature Based Modeling. Please review a few of the above ZW3D comparison lessons, there are some very stark differences.

Please watch a Solidworks user model this part!

With all the tedious constrained sketching for this simple part for the Absolute Beginner, you can imagine a complex part?

SolidWorks Practice Exercises | SolidWorks Basics Tutorial |Exercise 7

While creating 3D models from drawings is the very best way to learn 3D CAD and maybe some design techniques it does not expose the designer to the design flexibility necessary in design. IronCAD is all top down due to the single model environment. Creating mating parts is a cruise. But modeling is just one aspect of a well designed productive 3D CAD system.

Solidworks is a marginal 3D CAD system based on the dated Pro/e history based modeling system released in 1988. I sold Pro/e years ago and found it not productive enough for our engineering department. We use what we sell. That gives us the experience to effectively support our user base.

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ZW3D vs Solidworks

I would do a video, but I really am not good at it. So I will show you step by step. I will try and get ZW3D support to create one. They are very good.

The modeling technique is hugely responsible for the level of productivity. Those of you that are only trained in the sketch, sketch, constrain, constrain world are truly limited by not using the freedom of feature based design, that is available in even the most Solidworks-ish of CAD systems. If your designers are designing in these very unproductive and time consuming processes it might be time to review your standard design processes. Don't have any do you?

These lessons have actually turned into exercises in modeling techniques as compared to showing a more productive CAD systems. Again, I say, there are many different ways to model a part. I see with my exposure to direct edit modelers like CADKEY, I rarely sketch like you see the Solidworks fellow doing. I have always created my basic sketches by mostly creating offsets and extending and trimming or. It seems to be much easier. I never put in a fillet that can be created later. What do you think?

Since ZW3D is a sketch based product with a primitive shape option I will create the model in both processes. The sketched based model will be done with StreamLined Sketching to show the incredible simplicity and productivity over the de facto constrained sketching.

I first go do configuration and set the units to MM.

I create a new Part/Assembly file.

Note: When doing production design you can use the Multi-Object file to create a part file under a top file. You then could keep a legacy of modifications or similar parts in a single file

Modeling with Primitive Shapes

We are already in millimeters so lets get started.

Again I instantly differ from the Solidworks presenter by inserting a primitive cylinder and locating it 75MM fromX0Y0Z0 and sizing it. 

Note: Pro/e clones have been starting with the sketch for almost 30 years. Even today the sketch is the only option in most programs.

We insert a primitive block on the cylinder, orient it and size and set it to remove. I am showing you a new way of thinking. I could do this complete job in sketches but primitive are more productive and more fun!

We just extrude the face 15mm and set it to add so it becomes part of the shape. Nope, no sketch needed!

Now do something twice clever. We will just shell the shape. The is what I call Feature Based modeling. Once you start designing with shape you look at part design much differently than with constrained sketching.

Now for the main cylinder. We just insert a primitive cylinder at X0Y0Z0, size it and set it to add.

We select the sketch command, in where it requests plane we select the option and select insert datum. We select the XY plane and set the offset 5mm.

We set up -X and origin X0Y0Z0

In the sketch we project the necessary edges and create the two line making sure they are tangent with the large cylinder. The projected entities have to be unlinked and converted to usable entities. There is no constraining, I call this StreamLined Sketching.

We exit the sketch and extrude the the profile 10mm and set it to add.

We create a sketch on the top of the cylinder and set up to -X. We sketch the centerline and set the offset. Project the affected arcs and extend the lines and then create the two end lines. Here are the basic graphics.

We delete the reference entities and we have our finished sketch. Again no constraints.

We exit the sketch and extrude the profile.

We got to wireframe and create the diagonal line to cut the rib.

We will now select extrude and in the option we will create a curve list to create the profile entities. I like to show the other options than just creating another sketch.

We select okay and we can now set our extrusion depth and set to remove.

We insert a primitive block locate, size it and set it to add. You get very good at manipulating the primitives. It is quite challenging at first, but is quite fun when you get the hang of it.

We create the fillets. We do this now to prepare for the next step.

Now we will create the hole by inserting primitive cylinders at the center of the radii, sizing and set to remove

Now again we will insert a primitive block located, size it and set to remove.

There you only two formal sketches and a bunch of fun primitives.

ZW3D not only has the multi-object environment but also has integrated documentation so you can do complete projects in one file. This is huge.

You can see both the model and the document in the same file under the manager.

Here is the AID (Associated Information Document) (drawing).

You can see the two process that ZW3D offers are both hugely more productive than the tedious constrained based sketching.

You can see more on modeling techniques here.

3D Modeling Techniques Defined

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