Problem with ovals in Coreldraw x6

[OTHill]

I keep having problems when I draw an oval and also some small circles in drawings and I export and later want to import again the oval or circle comes with many segments . Is this a bug or can something be done about it?

[OTHill]

This is what it does in Sheetcam

[plasmanewbie]

Are you able to post the Corel Draw .cdr file of one of these problem ovals?

[adbuch]

It looks to me like you file needs to be linked/joined to attach all the individual segments into a continuous closed path.
David

[adbuch]

20220228_170308.jpg
This is what it does in Sheetcam

What program are you using to create your cut paths? Sheetcam?
David

[adbuch]

Yes - please post your .cdr file so we can have a look.
David

[OTHill]

Here are some random shapes. As you will see its only ovals and circles that are a problem.

Ovals and circles.dxf

(52.94 KiB) Downloaded 102 times

[adbuch]

Here are some random shapes. As you will see its only ovals and circles that are a problem.Ovals and circles.dxf

You have provided a dxf file. I opened it with CoredDraw and saved it in .cdr format.
I opened it with Design Edge, LightBurn, and Inkscape and don't see any problems. What is your specific problem? Is it only when you import to Sheetcam to create tool paths?
David

Ovals and circles from CD.cdr

(27.72 KiB) Downloaded 98 times

Ovals and circles export as dfx from Design Edge.dxf

(47.27 KiB) Downloaded 97 times

oval and circles.svg

(4.02 KiB) Downloaded 105 times

[adbuch]

20220228_170308.jpg
This is what it does in Sheetcam

I don't use Sheetcam, so I am not familiar with what it should look like. Perhaps Tom will step in here and give us a hand.
David

[djreiswig]

There is a post on the sheetcam forum about this. It has something to do with arc fitting.

[acourtjester]

Ok from the OP original image there are many segments, and it shows with the start numbers seen in the image for each oval. When I open the SVG file posted by David each item has only one start showing only 7 starts. As david states it needed the linked/joined function which he did. I cannot open the other files to look at it before. This is a way I look at drawing to see if they are complete or segmented, just checking the number of starts will show either. Hope this helps.

[cuttinparts]

I downloaded OTHill's file named Ovals and circles.dxf and opened it directly into Sheetcam and I only see 1 start for each object. This must not be the same file OTHill originally opened to generate the problem in the original post. Is there a different file? Could a different version of Sheetcam interpret the same file differently?

[acourtjester]

Now that is interesting here is what I get when opening OTHILL's DFX file different from David's ????? Now I am using SheetCam development version
Now if I use the TNG version I get this error message. OHILL are you using a current version of SheetCam

oval and 3.JPG (22.53 KiB) Viewed 6956 times

oval and 4.JPG (24.17 KiB) Viewed 6956 times

[cuttinparts]

For reference I was using the TNG version

[OTHill]

Thanks for all the help so far! I need to explain things a little more clearly. The problem isn't Sheetcam. When I draw an oval export and open in SC alls well. When I import the oval back into CD to edit it its all messed up.

Annotation 2022-03-02 083447.jpg On left is oval exported out of CD and into SC.On right is oval back into CD and opened agin in SC.[attachment=1]Annotation 2022-03-02 083447.jpg

Here is what it looks like in CD I know this is all messed up.Hopefully you get the idea. Im illiterate when it comes to screen shots etc.

[djreiswig]

Sounds like CD's import filter is messing up your arcs. Is there a setting that is converting them to polylines?

[SegoMan DeSigns]

There is a post on the sheetcam forum about this. It has something to do with arc fitting.

https://forum.sheetcam.com/viewtopic.php?f=2&t=8767

The dreaded splines strike again, I did multiple emails to Coreldraw over them and they say they don't exist..

[OTHill]

Sounds like CD's import filter is messing up your arcs. Is there a setting that is converting them to polylines?

Any idea where I would fix that?

[adbuch]

Sounds like CD's import filter is messing up your arcs. Is there a setting that is converting them to polylines?

Any idea where I would fix that?

You posted your dxf file, and not your cdr file. It is not clear what process you are using here. Are you saying you save as cdr, and then reopen with CD and it has these problems? Or are you exporting as dxf and then later importing this same dxf file to CD? Or???

I would need to know exactly what you are doing here to try to help you. Please post your original cdr file here (not dxf) so we can try to help you.

Thanks,
David

[acourtjester]

Here is more poop in the mix, I opened the first posted DXF file in Inkscape and it shows other circles and ovals that are hidden from the SheetCam display shown earlier. Could these be ovals or circles you deleted or removed but are still in the files background. Not knowing what you want to draw but I would look at learning Inkscape and using that. for circles and ovals they are very easy to draw, shape and size. This go the same for squares or rectangles. You can highlight each one and give it a size in the X or Y planes to reshape.

[acourtjester]

Inkscape

[OTHill]

Sounds like CD's import filter is messing up your arcs. Is there a setting that is converting them to polylines?

Any idea where I would fix that?

You posted your dxf file, and not your cdr file. It is not clear what process you are using here. Are you saying you save as cdr, and then reopen with CD and it has these problems? Or are you exporting as dxf and then later importing this same dxf file to CD? Or???

I would need to know exactly what you are doing here to try to help you. Please post your original cdr file here (not dxf) so we can try to help you.

Thanks,
David

There is no original cdr file. I draw in cdr than export as dxf and import back into cdr as dxf for editing when I need to edit.Thats when the trouble begins. Correct me if I,m doing this all wrong.
When I draw in CD, export as dxf and go directly into SC there is no problem.

[acourtjester]

Ok can you export it in SVG format??? I know if I save an inkscape drawing in DXF and then bring it back for editing it is all messed up. What I do is save the drawing in both DXF and SVG, if I want to edit I bring back the SVG file into Inkscape. It was said the Inkscape was built for vector work and the DXF is not its native format. This may be why you are having a problem bringing back file in DXF, save the file in CDR and recall that for editing later. The size of the Hard Drives in the PC today that is not a problem.

[adbuch]

Tom - that's exactly what I thought he was doing. Saving as cdr and then reopening later with CorelDraw. Same thing with Plasmacam, I normally save as .pcm file. However in the case of Plasmacam Design Edge, it gives no such problems if I export as dxf and then reopen (import) that same dxf. Also - he is using version 6 of Corel Draw, and not a newer version. Perhaps this was a problem with the earlier versions that has since been fixed with the newer version. I am using the 2020 version of CD and have not noticed any of these sorts if problems, although I don't use Sheetcam.

For problematic files that need to be relinked, I would recommend using LightBurn (cost is about $60). Lightburn will automatically link files before exporting as dxf, svg, etc. So I would say relink with LightBurn (either before or after reopening with CD) and I suspect this problem will go away.

David

[OTHill]

Ok thanks so much for all the reply. After much playing around I've discovered if I Convert to curves before exporting the problem disappears. I'll just have to remember to do that to any drawing that has holes or ovals.