Posts Tagged ‘end’

2017 PLTW EOC CIM Final Exam

It’s that time of year again! I am now receiving at least 20 requests per week that sound something like this: ” Can you give/share/sell me your final exam questions, resources, study guides?”. The short answer is NO. District policy prevents me from sharing any assessment resources that I utilize in the teaching of any and all courses including CIM.

I have two suggestions:

SUGGESTION 1:

As you teach each section of the course, develop 5 or so multiple choice questions from the powerpoints and the key terms given, then give them as quizzes throughout the year. This is a pain the first year, but makes every year after that much easier. This is what I do, and every year I add a few to my bank of questions.  I then choose 50-75 questions from this bank at the end of the year, and call this my final exam.  Again, due to disitrict policy, I cannot share.
THEN:

SUGGESTION 2:

2. Check the content map on the Assessment course of the PLTW LMS. this will tell you approximately how many questions there are on the final exam from each unit. This will help tremendously when your students study for the final exam. I put a picture of the one for CIM below from 2017. For the latest greatest version check the PLTW Assessment LMS often.

CIM Content map Continue Reading

The Basics: Tooling For CNC Machines

  • 1CCendmill
  • 2nonccendmill
  • 3Ballendmill
  • 6engravers
  • 10climbvsconventional
  • 10climbvsconventional
  • 5depthofcut
  • 4Stepover
There is so much to learn about tooling when it comes to CNC machines, that it can really be overwhelming. Here we present just the basics as it pertains to a “rookies” classroom. There are complete courses on these topics, but this should get you started! First of all, We have put together a short powerpoint which can be downloaded at the link below.

reddownloadCnJ CNC Tooling Basics

 

Topics:

Types of cutters: Center Cutting End mills

1CCendmill          

Types of cutters: Non-Center Cutting End Mills

2nonccendmill  

Types of Cutters: Roughing Mills

13roughingend

Types of Cutters: Ball End Mills

3Ballendmill

Types of cutters: Engravers

6engravers

Types of cutters: Fly or Shell Mill

12flyshell Does Number of Teeth Matter? What are Flutes? 7numderteeth

What is Depth of Cut? How Deep can I Cut on a Single Pass?

5depthofcut

What is Stepover? How Much Should I make the Toolpaths Overlap?

4Stepover

What is Chip Load?

8chipload

What are Tools Made of?

9toolmatls

What’s the Difference Between Climb and Conventional Cutting?

climb4 climbconvention2

What Tool Should be Used for Which Operations?

11whattool

        Continue Reading

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Jim Hanson

Chris Hurd

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