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I'm trying to use the mechanism function in the assembly mode of Pro/E 2001.  Every time that I attempt to use the DRAG function, the assembly explodes.  All of the parts and subassemblies are fully constained and highlight as ground objects(with the exception of the moving item of course), however they end up floating in space upon DRAG fucntion usage.  What am I doing wrong?

RE: mechanism

I am not sure about this since I do not often use Pro/E, but isn't there a matter of datums? And did you tell Pro/E all your DoF?

Université Joseph FOURIER
Département Génie Mécanique

RE: mechanism

Frustrating, isn’t it? And classes on MDX are few and far from north Georgia. I’ve had a little success with sliders by having planar constraints on the vertical and horizontal (bottom and one side). Also, in the Drag dialog box under the “constraints” tab you can set “mate two entities” constraints, which helps to keep the part from floating away. Now if you can get your assembly working properly, and it still works when you put it into a larger assembly, let me know!

RE: mechanism

I may have answered my own question. I have been trying to assemble a smaller assembly (with planar and pin constraint) into a larger assembly only to find things floating away again. Looks like I’ll have to assemble each piece into the larger assembly individually, not as a subassembly.

RE: mechanism

I was sure we could have sub-assys into a general assy with Pro/E

Université Joseph FOURIER
Département Génie Mécanique

RE: mechanism


As Cyril indicated, it is possible to combine a sub-asse with a general assembly...a sub-asse can be treated as single part..be sure that all your parts are constrained in a logical pattern to each other.  an example, a hing is made of two parts, one side is attached  to the wall and the other to a door...the first part of the hing should be constrained to the wall(in your case the ground) and the door should be constrained to the other part of the hing...a pin connection should be assigned to the hing attached to the door...when you drag the door, it'll drag the hing attached to it while the wall and the other part of the hing will be static...(the wall and the static part of the hing can be assembled in a sub-assembly and treated as one part in the general assembly)...

This is a simple example, I hope I Helped you more than I confused you...

University Of South Florida
Mechanical Engineering Student

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