Sweep Error: Cannot get a point on the path to start with

[suelflow]

I keep getting this error when trying to create a sweep. “Cannot get a point on the path to start with. For an open path, the path must intersect with the section plane.” I cannot figure it out; I have a sketch that I will use as the path. I make a plane “Normal to a curve” and sketch the profile on it. Then, I try to sweep and get his error. Sometimes, if I repeat the process at the other end of the path, it will work. Sometimes not. Any thoughts?

 

[JMirisola]

Do you have a pierce relationship between the profile and the path?

Jeff Mirisola, CSWP, Certified DriveWorks AE

http://designsmarter.typepad.com/jeffs_blog

Dell M90, Core2 Duo, 4GB RAM, Nvidia 3500M

 

[suelflow]

No, that's when I know it will fail. If I can pierce the center of the circle with the path it works. If I can only add a coincident to the endpoint, I know it won’t. What I don’t get is it that it says that the path does not intersect the section plane, yet the path was used to create the plane.

 

[smcadman]

Ctrl+pick a line on the sketch and it's endpoint then Insert > Reference Geometry > Plane and you are guaranteed a plane perpendicular to your line (even if it's an arc).

Now copy the sketch from the feature tree and paste it onto the new plane.

P.S.
I know that technically a line is not the same as an arc, but I didn't want to confuse you by calling it an entity.

Flores

 

[suelflow]

Nope, that doesn't work. Thanks though.

 

[smcadman]

Not sure what is going wrong because I have done hundreds of parts that way, even with 3D sketches.

Flores

 

[lumenharold]

I just tried it without the profile being constrained (pierce or coincident) and it worked fine. Perhaps you could post your model or a jpeg and someone will recognize what is going on.

Harold
SW2008 SP3.0 OPW2008 SP0.1 Win XP Pro 2002 SP2
Dell 690, Xeon 5160 @3.00GHz, 3.25GB RAM
nVidia Quadro FX4600

http://www.lumenflow.com

 

[suelflow]

It’s weird; sometimes it works, sometimes not. Once I learn how to upload the part I’ll do so.

 

[suelflow]

Duh.

 

[lumenharold]

I tried to set a pierce for the circle center and couldn't. When I did an edit on the plane I noticed a .00083ft offset between the plane and the line end point. I couldn't seem to effect that using the plane set-up you have. I thought it should work.

Harold
SW2008 SP3.0 OPW2008 SP0.1 Win XP Pro 2002 SP2
Dell 690, Xeon 5160 @3.00GHz, 3.25GB RAM
nVidia Quadro FX4600

http://www.lumenflow.com

 

[suelflow]

How did the plane get to be offset from the point? The line and point were used to create it. Is there a hidden setting I’m missing that would cause this?
The pierce will not work because they don’t touch. Can you set it to zero?

 

[lumenharold]

I tried to set it to zero: I tried to set the origin to the end point; I tried to select only the curve (w/o the end point). Every time I would open the plane back up to edit the position the offset was there. I don't get it.

Harold
SW2008 SP3.0 OPW2008 SP0.1 Win XP Pro 2002 SP2
Dell 690, Xeon 5160 @3.00GHz, 3.25GB RAM
nVidia Quadro FX4600

http://www.lumenflow.com

 

[suelflow]

How are able to change the offset? It is normal to curve.

 

[TheTick]

There's an offset involved? That increases the chance that your start point and plane do not intersect.

Long way around...
Extend your guide curve past where you need it to start. Add a point coincident with that curve to mark your start and create your plane through that.

I'm guessing a bit, as I am still on 07 and can't open your file.

 

[lumenharold]

Actually, I'm not. What I'm refering to is that the default in the plane setting says .00083 ft even if I reset it to zero it resets to .00083. When I measure the points SW tells me they intersect. I'm just as confused as you are so I'm digging around for defaults, etc.

Harold
SW2008 SP3.0 OPW2008 SP0.1 Win XP Pro 2002 SP2
Dell 690, Xeon 5160 @3.00GHz, 3.25GB RAM
nVidia Quadro FX4600

http://www.lumenflow.com

 

[suelflow]

When I measure between the point and plane it says they intersect!

 

[lumenharold]

Yes, I know. For kicks I moved your plane 33 to the other end of your path and placed a new plane at the end point parallel. Same problem, no pierce though they supposedly intersect.

Harold
SW2008 SP3.0 OPW2008 SP0.1 Win XP Pro 2002 SP2
Dell 690, Xeon 5160 @3.00GHz, 3.25GB RAM
nVidia Quadro FX4600

http://www.lumenflow.com

 

[lumenharold]

More info - when I measure the length of the path (just the first straight part) I get 83.11820238 ft but when I measure the center distance from the circle sketch to the repositioned plane I get 83.11970625 ft even though they supposedly intersect.

Harold
SW2008 SP3.0 OPW2008 SP0.1 Win XP Pro 2002 SP2
Dell 690, Xeon 5160 @3.00GHz, 3.25GB RAM
nVidia Quadro FX4600

http://www.lumenflow.com

 

[suelflow]

I duno. I guess I’ll just muscle my way through. I had someone suggest using the weldment environment. Maybe I’ll look into that, although I’ve only used it in class, four years ago.

 

[lumenharold]

I understand. But I'd like to know why it doesn't seem to work when it should. Where is that offset coming from? Sorry I couldn't help.

Harold
SW2008 SP3.0 OPW2008 SP0.1 Win XP Pro 2002 SP2
Dell 690, Xeon 5160 @3.00GHz, 3.25GB RAM
nVidia Quadro FX4600

http://www.lumenflow.com