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Computer Aided Design - CAD > Parametric Technology's Pro/Engineer > OT: Modeling wo...
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OT: Modeling world size

by "Janes" <djanes@[EMAIL PROTECTED] > Jul 22, 2008 at 08:02 PM

"Aggrevated" <tclement@[EMAIL PROTECTED]
> wrote in message =
news:c9d1bdcb-19db-41a3-a78d-a3f1b7a65668@[EMAIL PROTECTED]
> >...so you're not starting out in some ungainly large world with =
grotesquely large numbers.
>>
>> David Janes
>=20
> Yeah, that really irritates me.  When you get it resolved... please
> share.
> I usually deal with parts no larger than 1ftx1ftx1ft, but Pro/e thinks
> I'm desiging bridges or something.  On my first feature I'm always
> fighting the reletive accuracy crap.
>=20
> Maybe I should just take everybody's advice about absolute accuracy
> and shut up.


Well, I have it relatively resolved (meaning half-assed). There's a =
couple similar techniques:
1) Since Wildfire you've been able to do 'Edit>Definition' on the =
default datums, go to the Display page and check Adjust Outline by Size =
or Reference. There's nothing to reference on the first datum, so adjust =
the size to some number in your unit of measure (default is 508 of any =
unit, no idea where this number comes from); do the rest as Reference to =
this first datum. What makes this a little irritating is that even if =
your part grows beyond the boundary of this set size, the datum =
boundaries don't grow the way they normally do. But your first feature =
does start out with more realistic numbers in a world scaled to your =
needs. And relative accuracy is preserved, scaled to fit this world.
2) The other half-assed way I've used is to create a dummy first feature =
in the start part, like a sketch on the first datum. It scales the world =
to human size, but adds a questionable, confusing, apparently useless =
feature to every model. At least the datum will adjust to subsequent =
changes in model size and start you in a properly scaled world.

Best I've done, so far. The program I'm thinking about would probably =
only modify the sketch dims and regen. Still, with a prompting question, =
it might be of some value.

David Janes
 




 10 Posts in Topic:
Witness lines without dimension
Aggrevated <tclement@[  2008-07-17 15:42:05 
Re: Witness lines without dimension
"gluteous maximus eq  2008-07-17 18:29:11 
Re: Witness lines without dimension
"Janes" <dja  2008-07-17 16:42:09 
Re: Witness lines without dimension
John.R.Wade@[EMAIL PROTEC  2008-07-18 02:00:59 
Re: Witness lines without dimension
"gluteous maximus eq  2008-07-18 15:24:15 
Re: Witness lines without dimension
John.R.Wade@[EMAIL PROTEC  2008-07-21 01:45:09 
Re: Witness lines without dimension
"Janes" <dja  2008-07-21 17:22:14 
Re: Witness lines without dimension
Aggrevated <tclement@[  2008-07-22 10:14:24 
OT: Modeling world size
"Janes" <dja  2008-07-22 20:02:03 
Re: OT: Modeling world size
John.R.Wade@[EMAIL PROTEC  2008-07-25 01:23:29 

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tan12V112 Thu Aug 28 14:06:44 CDT 2008.