correct procedure

[sudhishjoseph]

Hello,

Please clarify regarding correct procedure :

Suppose I have a rectangular block and I make one or more holes
on this solid block using the hole tool. The references for these holes
are the edges of the rectangular block. Later I give rounds on these
edges .

In such a case are the references of the holes lost? Is it ok to do so,
if not please tell me the correct procedure or alternative solution.

Thanks,

sudhish

 

[brchapman]

The edges are still in the model. They just no longer show because the rounds have removed their display. The hole feature regenerates "before"the rounds. Therefore, the edgesare there when the hole feature needs them to regenerate. Edit the definition of the holes and notice what happens to your rounds. The model will "roll back" and the rounds will be suppressed. Also notice what happens when you make a drawing and "show" the hole dimensions.The hole dimensions will appear (in the properly oriented view) and the extension lines will go to the "virtual sharp" (To quote Solid Works) of the now missing corner. The extension lines are really attaching themselves to the edges, which you cannot see because of the round. I hope this helps you out.

 

[Dell_Boy]

Avoid using edges as references if at all possible because they are
affected by chamfers and rounds. Picking the faces of the rectangular
block will generally result in more stable references however faces are
affected by drafts.



If you can't fully plan the order of feature creation be prepared to use Reorder to get the feature list into a logical order.



As a very rough and general rule, rounds should be last and drafts should be second to last.

 

[BMD]

It is poor practice to use edges as references.


The problem with using the edges is if you decide to move the rounds in front of the holes, the holes will have lost their references and you will have to redefine them.


Dell-Boy is right... generally rounds should be last and drafts second to last unless you want conicals which your tool makers won't appreciate.

 

[proexpert]

<DIV>Joseph</DIV>
<DIV>Use ModelCheck to identify such kinds of errors in the model</DIV>
<DIV></DIV>