Loft- Entities invalid

[Menolik]

I'm trying to loft some circles, however when I try I get the message, "selected entites are invalid". I thought circles were compatible with the loft command. Do they have to be lined up vertically? Can the circles go up and down the z axis as they move on the xy as opposed to ascending or descending one way.

What I'm trying to do is make what sort of looks like the aftermath of a mole digging inside of the cylinder.

[Menolik]

Is there a better way to do what I'm trying to do?

[ReMark]

I've got 2007 running on my computer and I had no trouble lofting 6 circles (various diameters) vertically along the Z axis all in a line nor did I have a problem lofting them when a couple were offset from the centerline in the XY axis. My advice would be to try again. There is no reason why a 2D circle should be considered an invalid entity.

[Menolik]

yeah it still isn't working. I have no idea what to do. There is no reason for it.

btw The Police rock

[ReMark]

Yes, they do.

 

Try it with just two circles of different diameters. Keep them in line vertically and spaced 6 to 12 inches apart. What happens?

[Menolik]

i figure its not working because it would make my job a lot easier.

[Menolik]

can't even loft cricles at all, no matter how I arrange them.

[ReMark]

There are only six variables that start with the letters l..o..f..t I can think of; none of which should adversely affect what you are trying to do. Can you loft other shapes?

[Menolik]

yeah i just lofted a couple of arcs in the same fashion as what i need the circles to do.

[Cad64]

Are you sure they're not all lying in the XY plane? Have you Orbited around them to make sure they are in 3D space, and not just lying flat?

[ReMark]

This simple exercise was done using AC 2007.

 

In the foreground is a series of circles all centered on the vertical line. Only the circle diameters vary (small to large and back again).

 

Beyond that is a series of circles, of various diameters, some of whose centerlines have been shifted on the X or Y axis.

 

Both examples are shown prior to (on the left) and immediately after (on the right) lofting.

 

CircLoft07.dwg

[Menolik]

Absolutely

[Menolik]

Are you sure they're not all lying in the XY plane? Have you Orbited around them to make sure they are in 3D space, and not just lying flat?

Absolutely

[Menolik]

So can you loft the circles in this way: Height A lowers to height B raises back up to height A.

[Menolik]

here are the circles I need to loft.

circle2bloft.dwg

[ReMark]

First. You have two layers, 0 and Key. Layer 0 (color: white) has the five blue circles on it. I guess you decided to override the layer color. Layer Key (color: mustard yellow) does not appear to have anything on it. I cannot tell what is "A" or "B".

 

Using the View toolbar and looking at the drawing in the TOP view I see five spaced out circles. Looking at the same circles using RIGHT view all the circles appear to lap each other in some manner. It almost appears they are all at the same elevation.

 

Using the LIST command I get "Z" elevations of:

 

8.5265

8.5775

8.5121

8.5105

8.5145

 

Between the lowest and highest elevation there is a separation difference of only .0670! No wonder you are having a difficult time lofting the circles.

[shift1313]

a distance that small(depending on your diameter), acad will not like it. are you trying to model some geometry you already have?

[Menolik]

a distance that small(depending on your diameter), acad will not like it. are you trying to model some geometry you already have?

Yeah it has to be that small.

[Menolik]

First. You have two layers, 0 and Key. Layer 0 (color: white) has the five blue circles on it. I guess you decided to override the layer color. Layer Key (color: mustard yellow) does not appear to have anything on it. I cannot tell what is "A" or "B".

 

Using the View toolbar and looking at the drawing in the TOP view I see five spaced out circles. Looking at the same circles using RIGHT view all the circles appear to lap each other in some manner. It almost appears they are all at the same elevation.

 

Using the LIST command I get "Z" elevations of:

 

8.5265

8.5775

8.5121

8.5105

8.5145

 

Between the lowest and highest elevation there is a separation difference of only .0670! No wonder you are having a difficult time lofting the circles.

I just copied those circles from the main file to show the arrangement. The layers don't matter. As for the letters, I was just using that as an example of changing from lower elevations back up to higher elevations.

[Menolik]

So are you guys saying I'm not going to be able to loft those? If so, that is a bummer and I'm stumped on what to do. I'll post the model I'm trying to manipulate in a bit to see if you guys have any ideas on what to do.