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Grounded Workpoints

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Message 1 of 6
SRohrer
226 Views, 5 Replies

Grounded Workpoints

I am a two year user of Inventor but a new user creating hose runs with Inv10 Pro. I just finished routing six hydraulic hoses for a backhoe using sketches constrained to projected geometry and placing grounded workpoints on the sketch. After working on the assembly for awhile I noticed that the hoses had moved from the sketch. The attached file shows the workpoint is no longer on the center of the sketched circle. What is the point of having grounded workpoints if they don't stay grounded? I have tried redefining the workpoint but it won't let me select the sketch now. I am at such a loss as to what to do that I am ready to go back to the old way of using work axis and work planes to make my hose runs.

SRohrer
5 REPLIES 5
Message 2 of 6
Andreas
in reply to: SRohrer

I'm not using Pro, so don't know if this will help? Did you create the hoses using a 3D sketch with grounded workpoints and then finishing it with a sweep? Are the hoses selected as being adaptive?
Message 3 of 6
SRohrer
in reply to: SRohrer

That is basically how Pro does it, it creates a 3D sketch with grounded workpoints and then when you "populate" the run it creates a sweep. Yes they are adaptive.
Message 4 of 6
Andreas
in reply to: SRohrer

Investigate your referenced geometry from which you created the hoses from and possible switch to using parametric work points, don't know if you have much luck changing grounded to parametric?

I typically use the Create Component feature within the assembly panel, but I never used Pro so I'm not sure how different it is?
Message 5 of 6
SRohrer
in reply to: SRohrer

Pro creates hoses similar to Create Component but when I was using the trial version it seemed to be faster. Before Pro you would create work points trying to visualize where the hose would lay using work axis and work planes and then place a 3D sketch, well Pro does that in one step.

Upon much trial and error I have been able to figure out how to redefine the grounded work point, there were some extra steps in there that are not real obvious. You have to redefine the 3D move/rotate triad and THEN redefine the grounded work point. Nothing like that good old learning curve.

What gets me is why did the "grounded" work point move in the first place?

Thank you for your time Andreas.
Message 6 of 6
Anonymous
in reply to: SRohrer

Srohrer,

I may be wrong here, but it seems to me that perhaps the grounded
workpoints did not move, but the sketch geometry did move. I can see from
the image that the sketch lines aren't fully constrained.

The control points of the Flexible hose appear as grounded workpoints in
the browser. However, if control points are created associatively (that is
using a vertex, workpoint, circular or arc edge center) during creation of
the flex hose, the position of the control point will update when the parent
geometry is moved. So even though the workpoints appear as grounded in the
browser, they can behave associatively.

If a contol point is added to the Flex hose route using "add point", then
it will behave as grounded, and should not move. If a control point was
created offset from a face, it will behave as grounded and should not move.

To fix your situation, create a workpoints on your sketch circle centers.
Next, edit the Flex hose rounte, RMB on a control point and choose
"redefine". Click the workpoint created on the sketch circle's center point
to create an association.

I hope this helped.
--
Best regards.

Hugh Henderson (SQA Engineer)
wrote in message news:4870768@discussion.autodesk.com...
I am a two year user of Inventor but a new user creating hose runs with
Inv10 Pro. I just finished routing six hydraulic hoses for a backhoe using
sketches constrained to projected geometry and placing grounded workpoints
on the sketch. After working on the assembly for awhile I noticed that the
hoses had moved from the sketch. The attached file shows the workpoint is no
longer on the center of the sketched circle. What is the point of having
grounded workpoints if they don't stay ground
ed? I have tried redefining the workpoint but it won't let me select the
sketch now. I am at such a loss as to what to do that I am ready to go back
to the old way of using work axis and work planes to make my hose runs.

SRohrer

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