Yet another Mass Q involing Learning Center/ . . . /Sketching In-Context

david_cushing

So I posted in this thread :
https://forum.onshape.com/discussion/2314/no-mass-properties-icon#latest
But decided to make a new thread cause that one was marked "Answered".

So I'm at the end of 'Sketching In-Context' and they ask for the Mass of 'the part'. I did the exercise and got the wrong answer. I only have 1 part to check Mass on. Now on page 6/8 in this lesson it says "Create a new part by extruding the correct sketch faces." I extruded but it never made a "Part 2". What am I missing? Going to go through it again and see what I could be missing.

jakeramsley

Pay close attention to the image on 6/8.  The boolean type is 'New' which will create a second part.  By default, if the extrude is touching a face we will select it to be 'Add' unless manually changed.  Edit your extrude and change the type of 'New' to get a second part.

noa

Hi @david_cushing, after creating two parts instead of one you should get 50865.396 mm^3. There was a slightly different number labelled as the correct answer but it has been fixed and changed to this now.

jakeramsley

Pay close attention to the image on 6/8.  The boolean type is 'New' which will create a second part.  By default, if the extrude is touching a face we will select it to be 'Add' unless manually changed.  Edit your extrude and change the type of 'New' to get a second part.

david_cushing

I'm going to mark this "Answered" as it should fix the problem.
I still didn't get it right since my mass was off, but I did get it to be 2 parts in the end.
I will return and try this again to see if I can get it right, 2 parts and the correct mass.

noa

Hi @david_cushing, after creating two parts instead of one you should get 50865.396 mm^3. There was a slightly different number labelled as the correct answer but it has been fixed and changed to this now.