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billbedford  
#1 Posted : Monday, August 27, 2007 6:39:49 AM(UTC)
billbedford

Rank: Senior Member

Joined: 2/19/2007(UTC)
Posts: 186

Could some one please tell the criteria that changes a part with a history into a ACIS Solid in ViaCAD?

Is there any way of accessing the history of such a solid?
Tim Olson  
#2 Posted : Monday, August 27, 2007 10:33:36 AM(UTC)
Tim Olson

Rank: Senior Member

Joined: 2/2/2007(UTC)
Posts: 5,447
United States

Was thanked: 499 time(s) in 353 post(s)
>>Could some one please tell the criteria
>>that changes a part with a history into a ACIS Solid in ViaCAD?

If a prior object was used to define the solid, it will be a parent to the current object. Modifying the parent will modify any childern. For example:

--make some boundary curves
--make surfaces from the curves that form a water tight shape
--stitch surfaces into solid
--add some blends, shelling operations, holes

Now go back and move one of the curves (while still perserving a water tight shape). The operations you did will regenerate. Also, if you modify a parameter of any shape that was used to create the final shape, you can modify the parameter and the rest will rebuild.

You are limited to modifications that will perserve each operation.


>>Is there any way of accessing the history of such a solid?

Use Concepts Explorer and visit the Features tab.
Tim Olson
IMSI Design/Encore
billbedford  
#3 Posted : Tuesday, August 28, 2007 4:24:08 PM(UTC)
billbedford

Rank: Senior Member

Joined: 2/19/2007(UTC)
Posts: 186

Tim Olson wrote:


> If a prior object was used to define the solid, it will be a parent to the
> current object. Modifying the parent will modify any childern.

I've been working on some loco wheels (see attachment) and what I had hoped to do was to draw one spoke and polar duplicate it, then modify the six spokes around the crank pin boss in situ. But I can't do this because all the polar dulicates are ACIS solids which can't be modified. Instead I found I had to draw a plain spoke and duplicate it, then duplicate the parent curves for the crank pin boss spoke and then draw one of each type in situ.

Since I may have to draw a lot of different wheels I'm looking for the most efficient way for drawing them.

Incidently The ViaCAD drawing is coming out at just under 200Mb. Is this the sort of figure that would be expected?
billbedford attached the following image(s):
LMS Cl5-2.jpg (88kb) downloaded 5 time(s).

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ianjkirby  
#4 Posted : Thursday, September 6, 2007 5:32:21 AM(UTC)
ianjkirby

Rank: Senior Member

Joined: 6/20/2007(UTC)
Posts: 107

Hello Bill,
I'm new to viacad, so I'm not sure I have a solution to what you want to do, but I tried something similar, and I would be interested to have your opinion.
I created a cylinder, polar arrayed it 20 times, created a rectangle and extruded it, then added all the bits into one solid. After this, I was able to add individual fillets around the intersection of each spoke with the block. It failed only where the space between spokes created too much complexity for a solution, but I only used random sizes, so....
Is this similar to your model? I have attached a .jpg picture file; if it would help, I can send you a .vc3 file, but it is 1.2MB!
Regards, Ian Kirby.
Wollongong NSW Australia
ianjkirby attached the following image(s):
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Ian Kirby
Wollongong Australia
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