Problems with hatching

[sparrow81]

In my line of work I deal with objects that for the most part are comprised of arc's, spline's with few straight lines. The problem is, is that I have to hatch these, but my hatch command is always giving me problems. I always make sure whatever I am hatching is a closed polyline. Strange things happen. Sometimes when I pick to select objects to hatch it will hatch the object but it shows some sort of phantoms lines of hatch going in between the object. Sometimes they go away when I regen but sometimes they do not. Other times even though I know what I am hatching is a closed polyline and the gap tolerance is high is gives me the message about "Specified Hatch boundary not closed" but then it says that the gaps are within my specified gap tolerance, continue hatching? but when I select yes it hatches all kinds of random things around my drawing. If anyone could please help me I would really appreciate it.

[Anonymous]

Layers turned OFF instead of FREEZE can still be picked up and perhaps that
is what is going on: otherwise you will need to post a sample file you have
this problem with for others to examine.

--
Dean Saadallah
Add-on products for LT
http://www.pendean.com/lt
--

[sparrow81]

Sure no problem, like I said they disppear sometimes when I regen the drawing. I was able to get rid of the phantom lines by scaling the drawing up 25.4X to a 1:1mm scale. I don't know what the problem is. I have attached the drawing. Thanks for your help.

[Anonymous]

you posted a DXF: are you working in DXF files, not saving them to DWG
first?

--
Dean Saadallah
Add-on products for LT
http://www.pendean.com/lt
--

[lrlandusky]

Try using a different hatch and making the scale of the hatch very small (ex. use ANSI 131 at a scale of 0.001). The tiny space between lines will not print because your plotter will not be able to print that precise (unless you have a laser scribe).

If you need the solid hatch (for viewing on a presentation or something), try hatching smaller portions of the drawing. I was able to hatch your drawing in 3 parts without getting those lines to show up. The upper right portion of the drawing was the misfit that was giving me trouble. The larger hatch scale you use, the faster your drawing will be to work with.

If this is just for printing, find out what thickness your pens are set to and then make the scale slightly smaller (10%) than that thickness relative to your drawing scale. If you look at some of the AutoCAD shx fonts, they utilize this very idea. Angled lines spaced close together replace a solid hatch to fill in the letters.

[sparrow81]

Yeah it makes no sense. I was working on that drawing for a while yesterday and it gave me problems the whole time. I never could get those lines off, but today when I was getting that drawing ready to post onto here I could hatch it no problem, I really don't understand. Yeah, I need to use solid hatch because my drawings are printed off and they want a true representation of our product. Thanks for your help.

[sparrow81]

No, I do all of my drawings in dwg, but when I send one to someone outside my company I usually save in .dxf for easier usage. I have posted the same object as before but this one is still giving me problems, maybe it will still give you guys problems to better illustrate what I am talking about. I really appreciate all you guys' help.

[Anonymous]

Your Pline has overlapping lines/segments in it.
Your pline also has some Z elevation points in it.
it's actually three segments that once I tried to start cleaning up would
not join or flatten, even trying to divide it into smaller sections failed.

If may also be just too complex.

--
Dean Saadallah
Add-on products for LT
http://www.pendean.com/lt
--

[Anonymous]

The problem is in the meeting of the two arcs in the little ends, all 8 of
them. They didn't meet correctly.

What I did was exploded it, and drew lines to section off pieces to see
where it could hatch. I eliminated areas to check, and narrowed it down.

In that attached drawing you will see it hatched, and also a little circle I
made in the offending location, which in my drawing is fixed.

To see it I had to zoom in as far as ACAD LT would let me while staying
centered on the intersection of the two arcs, and to do that had to regen a
couple times. I could then see a jag instead of a smooth meeting of the
arcs. It was still connected with a "jag" line, so I don't know why ACAD
would not accept the hatch.

But when I deleted the jag line (which then left two unconnected arcs), then
used stretch on one stray end to connect it to the other stray end, that
fixed it. Had to do it to all eight points.

After this it would not hatch with pattern "Angle" that was default in your
drawing, but it would with ANSI31. Don't ask me why.

Greg




wrote in message news:5686391@discussion.autodesk.com...
No, I do all of my drawings in dwg, but when I send one to someone outside
my company I usually save in .dxf for easier usage. I have posted the same
object as before but this one is still giving me problems, maybe it will
still give you guys problems to better illustrate what I am talking about. I
really appreciate all you guys' help.