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Onshape Instructor Kit - 1.2.2 I'm stuck

benjamin_spencer
benjamin_spencer Member Posts: 1 ✭✭
in Community Support
So I have done 1.2.2 at least 10 times. and I keep coming up with the same answer 593914.627mm3
but it is telling me that is wrong. what am I doing wrong

Answers

  • fastwayjim
    fastwayjim Member, OS Professional, Mentor Posts: 220 PRO
    I got the same answer as you... so either we made the same mistake, or perhaps there is a typo?
    FASTWAY ENGINEERING
    Linked[in]
  • noa
    noa Onshape Employees, Developers Posts: 141 image
    Hi @benjamin_spencer and @fastwayjim, I get the same answer so we'll look into it more and likely fix it.

    Thanks for finding this!
    -Noa
    Noa Flaherty / Customer Success / Onshape Inc.
  • david_cushing
    david_cushing Member Posts: 16 ✭
    I've done this with 2 outcomes one with "1 part" and another with "2 parts". Both didn't work. My '1 part' mass was almost the same except the xxxxxx.627 was xxxxxx.598. Off by 0.029.
    Since MANY people are having problems with this they will make a public announcement about the fix.
  • jakeramsley
    jakeramsley Member, Moderator, Onshape Employees, Developers, csevp Posts: 669 image
    593914.627 mm^3 is if you create one part.  If you look at the first image, it is clearly two separate parts.
    Jake Ramsley

    Director of Quality Engineering & Release Manager              onshape.com
  • john_wolter
    john_wolter Member Posts: 14 EDU
    To elaborate on jakeramsley's post.  When you extrude for the second part, be sure to click on "New" in the extrude dialog to create the extrude as a new part.  I was getting the same answer until I figured this out.  Perhaps the exercise instructions or the answer key should point this out as a common mistake.
  • david_cushing
    david_cushing Member Posts: 16 ✭
    I moved on to part 2. I will come back and do this one again to see if I can get it right the 2nd time around. I did notice in one of the videos in part 2 that they mention how to make an extrude into a 2nd part. Not sure if that was covered in any of the part 1 videos. I will see when I go through part 1 again.
  • noa
    noa Onshape Employees, Developers Posts: 141 image
    edited December 2015
    @jakeramsley is correct. When you select New rather than Add in the Extrude, you should get 50865.396 mm^3, which is the correct answer. Everything is fixed in the online version (Introduction to CAD Series) and will be fixed in the downloadable Instructor Kit soon.
    Noa Flaherty / Customer Success / Onshape Inc.
  • david_cushing
    david_cushing Member Posts: 16 ✭
    Tnx @noa for the answer.
    Downloadable instructor kit?? Sounds cool.
  • noa
    noa Onshape Employees, Developers Posts: 141 image
    It's the same content but in a downloadable form meant for teachers and classrooms. Feel free to take a look here (just keep in mind we haven't added the fixes yet).
    Noa Flaherty / Customer Success / Onshape Inc.
  • noa
    noa Onshape Employees, Developers Posts: 141 image
    Just leaving a note that the Instructor Kit is all up to date (as v1.10).
    Noa Flaherty / Customer Success / Onshape Inc.
  • brian_guan
    brian_guan Member Posts: 13 ✭✭
    Very weird. My answer is 50865.397 mm^3 while the official answer is 50865.396.  I think it is just floating point error. I wasted time by redoing the exericse multiple times... Can't we account for this sort of floating point errors by using accuracy tolerance of e.g. within 0.01mm^3?

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