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sketch coordinate system rotating

6 REPLIES 6
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Message 1 of 7
ken.west
237 Views, 6 Replies

sketch coordinate system rotating

We're using Inventor 2009 and when we sketch on a part, the coordinate system in the sketch rotates away from the datum planes. The shape of the part is roughly half a ring. The gridlines give away that something strange has happened. Any ideas what's happening?
6 REPLIES 6
Message 2 of 7
Anonymous
in reply to: ken.west

Tooks > Application Options > Sketch - Uncheck Look at sketch plane on
sketch creation ( attached)


Also......
http://discussion.autodesk.com/adskcsp/thread.jspa?threadID=664656

--
Dennis Jeffrey, Autodesk Inventor Certified Expert
Autodesk Manufacturing Implementation Certified Expert.
Instructor/Author/Sr. App Engr.
AIP 2008 SP2, AIP 2009 PcCillin AV
HP zv5000 AMD64 2GB
Geforce Go 440, Driver: .8185
XP Pro SP2, Windows XP Silver Theme
http://teknigroup.com
wrote in message news:5929755@discussion.autodesk.com...
We're using Inventor 2009 and when we sketch on a part, the coordinate
system in the sketch rotates away from the datum planes. The shape of the
part is roughly half a ring. The gridlines give away that something strange
has happened. Any ideas what's happening?
Message 3 of 7
ken.west
in reply to: ken.west

Thanks for the reply. My description was misleading. This is actually in an assembly. When we select a surface to sketch on, the sketching grid is rotated from the datum planes of the part(and Assembly). When we turn on the coordinate system indicator, it reveals that the X and Y axes of the coordinate system are rotated away from the XZ and YZ datum planes of the part(and Assembly). This creates problems with editing the part because the coordinate system keeps changing everytime the part is edited. Thanks.
Message 4 of 7
johnsonshiue
in reply to: ken.west

Hi! I guess you want the sketch coordinate system aligned to assembly coordinate system as much as possible. Without seeing the actual parts and its assembly, it is hard to give good recommendations. Could you post the files here or send it to me?
Thanks!

Johnson Shiue
johnson.shiue@autodesk.com


Johnson Shiue (johnson.shiue@autodesk.com)
Software Test Engineer
Message 5 of 7
ken.west
in reply to: ken.west

Sure. I've been playing with this sample part. I add it to a blank assembly, then select the front of the part to sketch on and the coordinate system is rotated away from the YZ and XZ datum planes(rotating about an axis of the ring). If I edit the part making the part symmetrical, the sketch plane goes back to being in line with the datum planes. Of course, we want the part to be asymmetrical. I guess we can't attach IPT parts so here's a pdf of a drawing..
Message 6 of 7
Anonymous
in reply to: ken.west

To attach files, they must be zipped and under 1.5MB. Larger files may be
posted at http://interlancentral.com. Just follow the instructions on the
home page.

--
Dennis Jeffrey, Autodesk Inventor Certified Expert
Autodesk Manufacturing Implementation Certified Expert.
Instructor/Author/Sr. App Engr.
AIP 2008 SP2, AIP 2009 PcCillin AV
HP zv5000 AMD64 2GB
Geforce Go 440, Driver: .8185
XP Pro SP2, Windows XP Silver Theme
http://teknigroup.com
wrote in message news:5929966@discussion.autodesk.com...
Sure. I've been playing with this sample part. I add it to a blank
assembly, then select the front of the part to sketch on and the coordinate
system is rotated away from the YZ and XZ datum planes(rotating about an
axis of the ring). If I edit the part making the part symmetrical, the
sketch plane goes back to being in line with the datum planes. Of course,
we want the part to be asymmetrical. I guess we can't attach IPT parts so
here's a pdf of a drawing..
Message 7 of 7
JoyceZhou
in reply to: ken.west

Thanks for reporting this, Ken. I can reproduce it in Assembly sketch in Inventor 2009 with the asymmetrical ring. I find the coordinate system in the top assembly and in the part(the ring) is consistent, only the coordinate sysem in the assembly sketch chagnes to make the part symmetrical with X Axis.
I have reported it to our Tracking system.
Thanks!

Joyce Zhou

Joyce-Jinghua Zhou

Inventor QA Engineer

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