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Why is my mate assembly overdefined?
sylvan_blake
Member Posts: 2 ✭
in General
My mate assembly is overdefined. I'm pretty sure all of my measurements are correct and I'm using fastened mates. My problem occurs when establishing the second mate between the under arm cushion and the side support and the second mate between the handle and the side support. I have also tried slider mates but I get the same problem. Thank you.
https://cad.onshape.com/documents/806a70347326d9f6bb51727f/w/2adfaf81e763939fc7de6edb/e/96e003633d280eeaa7218674?renderMode=0&uiState=65f9c3454ca40d549131cd0d
https://cad.onshape.com/documents/806a70347326d9f6bb51727f/w/2adfaf81e763939fc7de6edb/e/96e003633d280eeaa7218674?renderMode=0&uiState=65f9c3454ca40d549131cd0d
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Matt_Shields
Member Posts: 214 PRO
Onshape only requires one to constrain a part. A Fastened mate fully constrains all 6 degrees of freedom of a part. In your assembly:Part 1 <1> is fixed Fastened 1 fixes Part 1 < 3> Fastened 2 fixes Part 2 <1> Fastened 3 fixes Part 1 <2> Fastened 4 fixes Part 1 <4>
Any more mates will overdefine your assembly.1
Answers
Any more mates will overdefine your assembly.
You have 6 bodies, and one is already “fixed” so you need to constrain 5x6 DOF. Therefore 5 fastens will fully constrain it.