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Simple sketched spline adjustment?

A

axnrxn

New member
Hi All,

I've been on a vacation from Pro/Creo for a while and I'm back on a surfacing project. I'm
trying to figure out how to drag the control polygon for a simple two
point spline that is constrained by tangency at both ends. I do this all
the time in older Pro/E releases and SolidWorks for creating curved surfaces,
but for the life of me I can't figure it out.


Simple scenario:
1. Open a sketch and draw two line segments at 90-degrees to each other that you can connect with a spline curve.
2. Sketch in your spline connecting the ends of both line segments.
3. Add tangency constraints on both ends of the spline curve so that it makes a smooth curve between the line segments.
4.
Now, I used to be able the right-click the spline, choose MODIFY, and
then I could click one of the available buttons to get the control polygon to
show up. You can then drag the two polygon points around, but the ends of the spline
stay tangent.

But, for some reason I can only get that button to
work or drag any control polygons if the spline curve has no tangency
constraints on it. I swear to my lord and savior that I've surfaces
products for years in Pro and this is how it worked.

For
example, in Solidworks, I set up the same sketch and the spline curve
automatically has two drag arrows that I can pull around in length to
adjust the look of the spline.

Thanks for any help!This has got to be an easy one..
smiley2.gif
 
yeap, that is the point - you can`t.

but what you can is to reverse a little the sequence of constraining the spline.

So instead of setting tangency at start, please make spline, modify it, switch to control polygon, accept, and then set tangency or 180 deg position with adjecent lines. Now everything should work as intended.
smiley2.gif





Edited by: muadib3d
 
SRINIVASANIYER1,

How did you make it happen?

To have to do it in reverse sucks, because you have to "aim" your spline with the line segments (not always at 90-degrees from each other) and "tweak" the curve profile with the control polygon. To have to go back-and-forth with this is a complete PITA.
 
UPDATE!!!!

So,
I got in contact with my VAR about this issue. It seems that in WF4,
the functionality that I'm talking about works with no problems. Once
you go to WF5, you can no longer drag the control polygon. They have no
idea why this changed. There may be a config setting or something that
changes this.

If anyone knows, let me know!

--> Karl
 
The reply from VAR surprises me since I use WF5 and have
not moved on to Creo 1.0. The picture is from WF5.
While in sketch mode...

I drew a spline with endpoints on the X and Y reference
lines.
Defined tangency, right clicked to select modify and
there you are....

You would find that what I have done is exactly what you
have described. Please check out whether there is a
config setting. To my knowledge there are none. Still it
would be worth a check.
 
Srin,

Yeah, the functionality ebbs and flows with releases, it looks like.

WF4 - works
WF5 - Doesn't work
Creo/Pro 5.0 - Works
Creo 1.0 - Doesn't Work

Supports Response:
"It looks like PTC knows about the issue we went over this morning. It
also appears there is no solution yet for Creo but it looks like if you
get WF 5.0 build code m110 you should get that functionality back. See
attached picture. I
know this probably is not the answer you are looking for but at least
you are not crazy right. I also checked to see what build code of WF
5.0 is out and it appears M120 is out so if you get WF 5.0 M120 you
should be good to go. Let me know if you have
any other questions."
 
axnrxn said:
Yeah, the functionality ebbs and flows with releases, it looks like.

WF4 - works
WF5 - Doesn't work
Creo/Pro 5.0 - Works
Creo 1.0 - Doesn't Work
Click to expand...

I gave it a try with WF 5.0,and it worked both ways.
 
When I tried you have to deselect the first icon (if it is already selected) and select the third icon or select the third icon when you go into the modify environment. This should allow you to keep tangency constraints that you applied or add tangency if the constraints were removed assuming this isn't a datecode issue. Selecting the first icon will remove the tangency constraints and doesn't allow you to add them back. I tried this in M040.





View attachment 5537
 
I was able to try a later date code and found you can add constraints
to the control polygon lines. If I started out with tangency at the ends
constraints would be added to the polygon lines. I only tried with lines
so I don't know what it does with arcs. ProE added horizontal, vertical,
and co-linear constraints.
 
Just downloaded and tried the latest m20 creo 1.0 build and it still
dosen't work. I've just gone back to using creo/pro 5.0 and it work fine.
Kinda makes the maintenance payments hard, though. ;.) (thats a tear
running down my smiley's face)
 
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