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<mikeg@goughecon.com>This
wrote in message
href="news:6125408@discussion.autodesk.com">news:6125408@discussion.autodesk.com...
is something that annoys me to no end and that I have never seen explained .
Why the heck does Inventor arbitrarily orient sketches as it sees fit? I often
create my first sketch on the right (YZ) plane and Inventor, stupidly turns
the sketch where "RIGHT" in the view cube reads from top to bottom. This is
totally absurd. I know all the things to do to AFTER this happens, but it
shouldn't happen in the first place. If I turn my sketch so that up is up,
like it should be, I then have to remember that vertical is horizontal, which
is now vertical. I can't change the sketch coordinate system. It's the first
sketch and there is nothing to align it to. Autodesk has to have an
explanation for this, but I haven't heard it. Maybe someone would be so kind
as to fill me in and, if possible, how to prevent the above example from
occurring in the first place. This, and the fact that I can't dimension to any
existing vertices or edges without projecting them first, really make me hate
using Inventor sometimes. To me, these are huge problems, neither of which
Solidworks has. At worst, both of these behaviors should be configurable.
Thanks Mike
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<mikeg@goughecon.com>Dennis,
wrote in message
href="news:6125481@discussion.autodesk.com">news:6125481@discussion.autodesk.com...
There is nothing in Sketch options to control the sketch orientation. I've
tried everything, over the last several versions, and it's still the same way.
Also, the problem isn't the orientation of the view cube. I can reset it to
whatever I want. But that doesn't stop Inventor from rotating the orientation
of sketches created on the YZ plane 90 degrees CW and those created on the YZ
plane 180 degrees. I would love to here Autodesk explain why they chose to do
it this way. It just makes no sense to me. JD, Let me rephrase the last part.
Change "without projecting them first" to "without them being projected
first". I still don't see why the geometry needs to be pulled into the sketch.
I'm sorry I brought that one up. It only distracted from the main question,
which was about sketch orientation. Sam, I don't display the grid or the axes
in my sketches. Too much clutter for my taste. Also, it's more comfortable for
me to work with horizontal and vertical constraints. While I don't consider
myself an "expert" in 3D CAD, I'm also nowhere near a beginner. I'm still
relatively new to the newer versions of Inventor, though. They're improving it
so fast that I miss new features and enhancements from time to time. The
bottom line here is that I assumed that the sketch orientation issue was me
not knowing the proper setting to correct it. This may still may be the case.
Actually, I hope it is. That way, I'll find a solution in time. Thanks to all
for your comments and suggestions, Mike
Mike,
A couple of questions/suggestions:
1) go to Application Options and uncheck "Look at sketch plane on sketch creation.
2) set your Constraint placement priority to "Parallel and perpendicular"
3) Is there a particular reason you need a sketch CS aligned in a particular fashion? (We align parts to the part CS, but do not worry about aligning/rotating sketch CS).
As far as the "problem", its not really so much of a "problem" as a choice. You will notice that if you have the "Look at sketch plane on sketch creation" selected, then when you make a sketch on one of the Origin planes, then it is oriented such that the Part CS has a vector pointing out of the screen, and another vector pointing "up". This is a reasonable choice and is consistant.
My guess is that once you turn off the option to "Look at the sketch plane..." your troubles will go away cause you can just view as you see fit.
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<Josh_Petitt> wrote in message
href="news:6126457@discussion.autodesk.com">news:6126457@discussion.autodesk.com...
or
set to none (which is what we do). Depending on what we are drawing, we start
on different planes.
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<mikeg@goughecon.com>Igor,
wrote in message
href="news:6126255@discussion.autodesk.com">news:6126255@discussion.autodesk.com...
Thanks
for your input. I understand that each sketch has its own UCS and that I can
change it. Well, I can if it's not the first sketch. As I said before, if it's
the first sketch, there is nothing to realign it to. If Inventor let me align
to the origin axes, that would help. But, I digress. I shouldn't have to do
that at all. I hoped someone would tell me that I missed a setting somewhere,
but that's not been the case.
The problem still is that
Inventor thinks the UCS of a sketch on the right plane needs to be rotated 90
degrees and, even worse, why a sketch on the top plane needs to be turned
upside down? I think the question has pretty much been answered, though. There
is nothing I can do to make Inventor stop creating that problem. To me, it's
just ridiculous and the most annoying of the everyday things I do with
Inventor.
Mike
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<mikeg@goughecon.com>
wrote in message href="news:6126255@discussion.autodesk.com">news:6126255@discussion.autodesk.com...
Igor,
Thanks
for your input. I understand that each sketch has its own UCS and that I can
change it. Well, I can if it's not the first sketch. As I said before, if it's
the first sketch, there is nothing to realign it to. If Inventor let me align
to the origin axes, that would help. But, I digress. I shouldn't have to do
that at all. I hoped someone would tell me that I missed a setting somewhere,
but that's not been the case.
The problem still is that
Inventor thinks the UCS of a sketch on the right plane needs to be rotated 90
degrees and, even worse, why a sketch on the top plane needs to be turned
upside down? I think the question has pretty much been answered, though. There
is nothing I can do to make Inventor stop creating that problem. To me, it's
just ridiculous and the most annoying of the everyday things I do with
Inventor.
Mike