Winter Snowflake Challenge

Youtube PlaylistSnowflake Challenge


You have been approached by your high school’s tech club to help them design a snowflake style ornament for their annual fundraiser.  This year they would like to offer an ornament that has been laser cut.  They have a few requests for you to consider while helping them design this year’s ornament. Download the Snowflake Challenge, Check out the first video in the playlist for an introduction and let’s get started!


Please read all of the constraints on the dowownload before you start, but here are the basics:

  • The final product must be 1/8” thick
  • Final design must fit in a 2.9” x 2.9” square.
  • Material is 1/8” thick acrylic or wood.
  • It should be simple in design: Use the tools you have just learned about in Inventor.
  • Design must have at least one patterned feature:
    • Circular or Linear
    • Mirror or curve


Watch the videos below, and use what you have learned in class to complete this assignment. The first video is an intro to the project. Please watch it first! The other videos are review of what you learned in class about patterning and can be found in the playlist below.


Did you make some cool examples? Send us some pictures or post them on social media with #CNJWinterSnowflakeChallenge Can’t wait to see your ideas!

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Hole Notes and Hole Types


Geez… there’s lots of different types of holes…. how do I know the difference when reading a drawing?


Once again… Jim to the rescue with a LOT of information about holes.

Going Beyond: Hole Notes

Answer the questions below by copying and pasting them into a google doc. Submit the answers to your instructor.

  1. What # hole will screw A fit into? If more than one list them all. 1,2,3,4,6
  2. What # holes will screw b fit into? If more than one list them all. 5 only
  3. What holes might a bolt fit into? If more than one list them all.
  4. Name the holes:
  5. Hole #1 & 2 is a ____________________
  6. Hole #3 is a ____________________
  7. Hole #4 is a ____________________
  8. What might be the advantage for using this type of hole?
  9. Hole #5 is a ____________________
  10. What might be an advantage for using this type of hole?
  11. Hole #6 is a ____________________

Going Beyond: Hole Notes 2

  1. The Symbol “A” in the photo above means ________________
  2. The Symbol “B” in the photo above means ________________
  3. The Symbol “C” in the photo above means ________________
  4. The Symbol “D” in the photo above means ________________

Going Beyond: Thread Notes

Answer the questions using the picture above.

  1. What is the diameter of the bolt that goes into the threaded hole?
  2. What does the “-18” in the photo above mean?
  3. What does UNC mean? Explain fully.
  4. What might a bolt or hole be if it is not UNC? What does it stand for?

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Advanced CAD Modeling & Mfg Math Activity

Worksheet with DimensionsElectronic Hand-in Document

In this activity, students can download the worksheet with the dimensions and directions, and use them to build the METRIC models in your favorite 3D modeling software. NOTE: Worksheet with Dimensions Drawings updated 4/30/2020… Thanks Tim Sullivan!

Here’s an example from the worksheet download.

When they have built all the METRIC parts in 3D Modeling software, they can download the electronic hand in document, paste snips into it for you, the teacher, to check and hand in electronically.

Here’s an example of the type of math required for one of the parts.

The Hand-in document also has manufacturing math related questions in the conclusion section to answer that deal with all of the parts that they have manufactured.

You as the teacher can decide which models your students have to do and/or which math questions they have to answer. Math teachers will love you for reinforcing their material and science teachers will too; there’s some science concepts in there too!

Sorry… we do not have the answer key available for the activity…. yet….. teachers can cntact us…

This would be another activity that you might be able to use as a distance learning project during the COVID-19 outbreak as well.

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Basic Part Creation Using Autodesk Fusion 360

Download the Worksheet Download Hand-In

Student Notes: Download the Worksheet, dimension the parts using the given scale, then make them in your 3D modeling software! Here is a project to help you and your students get acquainted with Autodesk Fusion 360. There are eleven parts to make, and they are all pretty simple. There are many examples of subtractive and additive 3D modeling techniques as well as extensive use of the Hole tool. There is a Loft as well.

Teacher Notes: Download and hand out the Worksheet, so that students can figure out the dimensions and take notes, then hand out the Hand-In file electronically so that students can paste a snip of the parts into it so that you can grade it.

These parts originated from a worksheet I used to use when we used t-squares and triangles on a drawing board so some of the more “seasoned” professionals may get a kick out of them!

This would be another activity that you might be able to use as a distance learning project during the COVID-19 outbreak as well.

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2015-16 PDP #5: The CAD/CAM Process

on Wednesday, 18 November 2015.


The fifth PDP session for the 2015-16 school year was held last night. In this one, Chris talks about the CAD/CAM Process. No matter what you use for CAD software, or CAM software the process is the same. This 27 minute segment takes you through the CAD-CAM process, and shows you how to make profiles, holes and pockets.

Tentative Meeting Schedule


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How do I use Inventor to make The Flange?


How do I use Inventor to make The Flange?


See the video below for one way to do it. It walks you through all the steps from hole cycles to profiles, to roughing operations.

The video below does not have any sound track.

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