CSWP Segment 3: Flow and Tips

So let's talk this time about the flow and some tips for Segment 3.  The good news is there is little modeling in this section.  The bad news is some of the material is not stuff that I knew off the top of my head.  Once I figured it out, they were some fairly simple concepts though.

We are going to start off this segment by modeling a part.  Nothing fancy, but be careful, when you have it completed, it asks the mass and is a fill in the blank question.  There is a check, but not until the next question...

You are going to then download a part and make an assembly of this part and the part you modeled for the previous question.  It will then ask you for the Center of Gravity (Center of Mass).  This question is Multiple Choice.  As long as you put the two parts together as they tell you and the origin is located in the place they tell you, then you should get an answer that exactly matches one on the test.  If you do, you can be reasonably assured that you properly modeled your part.  If not, I would suspect the part from question 1 is not quite right.

You are then going to download and add another part and answer the COG again.  The answer is Fill in the blank.

Next comes a technical move.  You are going to rotate one part until it hits another part.  Once it hits, you are going to measure the angle between two surfaces.  This is a Fill in the Blank question.

Download another part and tell what the mass is, again, fill in the blank.

Change gears for the next question.  Model up a part, download another part and make a subassembly out of these two parts.  This is a multiple choice question asking for the mass.

Download a third part, add it to the subassembly, then add the entire sub assembly to the first assembly.  You need to know how to make a subassembly flexible on this one.  They ask what the COG is and it is a fill in the blank question.

Download a part, add it to the assembly, what is the COG? (Multiple Choice)

Download a part, add it to the assembly, what is the mass? (Fill in the Blank)

Model a part, add it to the assembly, what is the COG? (Fill in the Blank)

That's a lot of assembly work...  Now, take your whole assembly and evaluate it for interference.  List all the parts that exhibit interference.  This is a multiple choice with multiple answers (check all that apply)

The final question is to take your original part and replace it with a downloaded part, than answer one last time, what is the COG?  (Fill in the Blank)

We will get into how to do the things above in a later post, but here are some tips to think about. 

• If question #2 is wrong, you most likely did something wrong in question #1.  If so, please don't forget to fix the answer on Question 1...
• I think on every test, it says that the part origin is arbitrary.  My advice is to treat it like it is not on every test.  On this one, it will bite you, because the COG is generated about the origin, right?  If your origin isn't in the same place as the origin on the test, there is no way you can get the question right...
• Know your mates.  Width, Parallel, Perpendicular, Dimensional and Angular are popular on the exam.
• In the how to section, we'll get into collision detection, flexible assemblies, interference detection and how to replace a part with another.

Stew on this for a bit.  Next time, we'll start with segment 1 showing you some of the skills you need.  As always, if you have any questions, let me know by posting them below.

Thanks,

Bryan