Dimension/Tolerance issue

[SK83]

Hello,

I am looking for advice on a problem I’ve encountered.

I'm looking to use Inventor 3D models in manufacturing. In a step to achieve this we will be modelling to Mid size, therefore using the ‘Median’ option in dimension properties, then select the appropriate fit.

The problem I have encountered is when creating the 2D Drawing.

When  ‘retrieve dimensions’ is used, there is no issue, the nominal dimension is displayed with the selected fit driven by the model. The problem occurs when I dimension the part manually and apply the same fit, this dimension will be driven from the actual model size – which is the mid dimension.

Is there any way round this? Where, if the drawing is being dimensioned manually it will calculate the tolerance from the nominal size?

I have attached a PDF of a quick example – showing the same part however with different dimensions.

Thanks

[Anonymous]

Set the model tolerance to nominal, then you will get the same thing using drawing dimensions.

Of course this will change the size of the model to the nomimal size specified in the model dimension.

I use the retrieved dimensions from the model, they will show the same regardless of the size (except for the underline).

[SK83]

Thanks for your reply.

Unfortunately I'm  modelling to mid size, so need to use Median. Also in some instances certain dimensions need to be added manually as retrieve dimension does not show them as we require.

Stuart

[Anonymous]

You should be able to retrieve most model dimensions if your drawing view is normal to the sketch plane of the dimension you are trying to retrieve.