Is there a way to remove the 'parting' line to create a smooth surface?
Thanks,
Larry
Inventor 2013, SP2
Dell Precision M6600
Windows 7 Professional - 64Bit
32 GB Ram
Nvidia Quadro 3000M
Solved! Go to Solution.
Solved by JDMather. Go to Solution.
Where did this cam originate?
(the acceleration curve is interesting)
Why is the line a problem?
Did you use the Inventor Cam Generator to create the cam?
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JD,
This was just a mock up test part, not an actual cam.
The idea is still the same. What we're trying to accomplish is importing the Acad 'spline' sketch into Inventor and extruding the cam surface. I've tried polylines/open/closed/spline/loose points. Nothing gives the desired result that I'm looking for. The spline gives the best but I'm always left with the begining/end point. I've tried every option I can think of. I've tried the 1st option you sent through, which accomplishes my intent almost, but does not follow the original shape. It's buldged out slightly.
Any thoughts would be greatly appreciated.
@ljapsey wrote:
... I'm always left with the begining/end point. ....
I don't understand why this line is a problem?
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JD,
Well, it's a faceted surface then and really doesn't need to be.
The machine shop has stated when using the geometry for cutting the cam that it leaves a bump.
If we use it for tangent contraints in the assembly, it will fail at the parting line.
More than anything, I'm just interally curious why it can't easily be removed be just a smooth/continuous surface.
Thanks for your input.
Larry
@ljapsey wrote:
The machine shop has stated when using the geometry for cutting the cam that it leaves a bump.
If we use it for tangent contraints in the assembly, it will fail at the parting line.
It is not faceted. The machine shop should be able to remove the dwell in the G-code.
Tangent is not the correct assembly constraint to use - use Transistional.
I'll experiment a bit and see if there is a way of gettting the patch perpendicular to the planar faces, but I am not a big fan of using AutoCAD geometry in Inventor.
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The problem is that the original curve was not tangent continuous (not that there is a line at that location).
I would need to see the original curve rather than the base solid to offer any other suggestions (other than use the Cam Generator within Inventor).
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JD,
I couldn't agree more, not a fan either. This is about the only thing that we use the Acad geo for.
The majority of things is much easier to redraw.
We have many Cams and they are created by hundreds of points and would be EXTREMELY time comsuming to redraw in Inventor, especially with no better end result or beneift.
Thank You for your time!
On another note. Did you happen to come across my other thread. This is much more of an issue.
@ljapsey wrote:
We have many Cams and they are created by hundreds of points and would be EXTREMELY time comsuming to redraw in Inventor, especially with no better end result or beneift.
Most likely approximations and not really correct anyhow. Limited by the avialable technology of the time (AutoCAD).
You might look into the Inventor Cam Generator Design Accelerator.
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JD,
Definately something to look at in the future.
Thanks,
Larry
How was the spline created in AutoCAD - was the C for close used or was the first point selected as the last point?
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JD,
Generally.
It is a bunch of plotted points, turned into to a closed polyline (to make sure it's closed)
Pedit/Spline
I believe most of them were created before the spline command worked well in Acad.
Thanks,
Larry
JD,
Just trying out that DA Cam and that paring line exists. The sketch from that comes in just like the one that I can make from the Spline/Acad sketch.
Learn something new everyday.
Thanks for all your help!
Larry
@ljapsey wrote:
JD,
Just trying out that DA Cam and that paring line exists.
Larry
The line is there, but if you go to the Inspect tab and do a Curvature Analysis you will see that there is no discontinuity across the line. The curve is smooth tangent continuous across the line.
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