hydromech
Mechanical
- Oct 28, 2004
- 626
Hello All...
In our our office we have collective experience of Pro Engineer that is in excess 100 years us use. But nobody knows the best solution to this "problem" and PTC are no help at all.
The issue is regarding the best way to attached a geometric tolerance to a part in an assembly, whilst maintaining a parametric association.
I have a pulley on a water pump and that water pump will go onto a heavy duty diesel engine in serial production.
There is a datum established through a hole through which the pump is attached and aligned to the engine. The drive pulley needs a positional tolerance to ensure correct position of the pulley in relation to the engine.
To maintain a parametric relationship, the effective diameter of the pulley is shown on the drawing and the dimension is from the part. It is not a created (draft) dimension. I want the pulley to be aligned to the assembly datums. Pro Engineer lets me select the part to use as a reference and the dimension in which to place the geom tol, but it does not see the assembly datum. Likewise, if I create the geom tol in the drawing, it will not see the dimension of the pulley. I can create a dimension on the drawing to show what I want, but dimension is not parametric and it falls over when the dimensions of the pulley change.
Does anyone know the proper way to show geometric tolerances in an assembly whilst maintaining a parametric relationship between the drawing and the assembly model?
Thanks in advance
Adrian
In our our office we have collective experience of Pro Engineer that is in excess 100 years us use. But nobody knows the best solution to this "problem" and PTC are no help at all.
The issue is regarding the best way to attached a geometric tolerance to a part in an assembly, whilst maintaining a parametric association.
I have a pulley on a water pump and that water pump will go onto a heavy duty diesel engine in serial production.
There is a datum established through a hole through which the pump is attached and aligned to the engine. The drive pulley needs a positional tolerance to ensure correct position of the pulley in relation to the engine.
To maintain a parametric relationship, the effective diameter of the pulley is shown on the drawing and the dimension is from the part. It is not a created (draft) dimension. I want the pulley to be aligned to the assembly datums. Pro Engineer lets me select the part to use as a reference and the dimension in which to place the geom tol, but it does not see the assembly datum. Likewise, if I create the geom tol in the drawing, it will not see the dimension of the pulley. I can create a dimension on the drawing to show what I want, but dimension is not parametric and it falls over when the dimensions of the pulley change.
Does anyone know the proper way to show geometric tolerances in an assembly whilst maintaining a parametric relationship between the drawing and the assembly model?
Thanks in advance
Adrian