i make the assembly drawing accroding CSWA QUESTION , when i finish the assembly, i find my answer is : x=2.75 y=24.33 z=-40.24
but the correct question is x=2.75 y=24.33 z=40.24, z is different, i am not sure why? can any one help me solve it out?
I think you may be reading the coordinate system on the example in the wrong manner. Negative X and negative Z are pointing away from the model, so therefore the model lies in positive X and positive Z. Here is the model with my coordinate system and the mass properties box.
Correct answer is X = -40.24, Y = 24.32, Z = -20.77. The answer must be missing the - for the direction in the pdf file.
And make sure you select Coordinate System1 under Output coordinate System in Mass properties window.
The correct answer actually is C) X=40.24 Y=24.33 Z= 20.75.
This is the correct answer exactly. Any other answer is wrong. Deepak I suspect your answer is wrong because you did not use the right material in your components. I will send you the model if you need it. Here I will post the mass properties so you can see. And guys you must realize that the assembly uses a different coordinate system that you must create.
Please carefully study the coordinate system axes in the sketch. The labels on the Z and X axes have minus signs (-) in front of the letter. That is indicating that the negative Z direction is toward the left, and therefore the center of mass quite obviously must be in the positive Z direction.
Charles/ Josh, I understand my mistake here, I was making the coordinate system in wrong direction
Thanks for clarifying the same.
COULD U MIND SEND THE MODEL TO ME I JUST CHECK WHICH WRONG WITH MY MODEL, I NEED THAT,
COULD U MIND SEND THE MODEL TO ME, I NEED IT TO CHECK MY MODEL
MY EMAIL IS SG55754550@163.COM
Ying, here is the model. Also remember when you check mass properties you must select the new output coodinate system you created or else your model position will be read from the default coordinate system.
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