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1
Welcome to the forum!

I don't clearly understand your question, relative to your screenshots.  This is the question I heard:

Quote
I use dxf more often, but then I have to cut lines and erase nodes on SmartCarve to clean the image.

Does anyone have an idea about what causes this problem, or about the solution?

Are the lines that you have to remove all those lines which seem to meet at one point?  Do you know where those lines are coming from?  Are they somehow a result of converting to DXF?

I'm not set up to handle DXF, so I can't test for myself.

Oh wait.....that's what you see in the cutter software.  So all those lines that meet at one point -- is that the path which the cutter takes, on it's way to the cutting paths?  Or does it actually want to cut all those radial lines (which meet at one point).

As far as using Trace Bitmap, you have to do some editing before you send it to any cutter.  Have you inspected the paths which are created by Trace Bitmap, I mean with the Node tool? 

If you look closely at the cutter preview, you can see the "double lines".  Or else in Inkscape, try this.  After you trace something, add a stroke and remove the fill.  That will make the paths easily visible, and you can see that instead of one nice cutting path, you have 2.  So for a complex image like the train you used in your example, a good deal of editing will be necessary, to result in the single cutting paths that you need.

In some cases where you want to etch an image into wood or whatever, the paths which Trace Bitmap creates are perfect.  But for cutting a design out of some media, more editing is needed.

Multiple scan options would really only be a good choice if the raster image has colors.  For b/w images, a 2 scan Color trace gives essentially the same result as a single scan option, as far as the cutting path.

If you're planning to cut that train image out of something, because of its complexity and how much node editing will be needed after Trace Bitmap, I would probably trace the image using the Pen/Bezier tool.  That will give you the single path that you need.

If you're planning to etch it into some media, I would ask if all those radial looking lines (meeting at the same point) are the ones that you need to edit?  And if not, what editing is needed, which you want to reduce or eliminate?

2
Help Using Inkscape / Re: Inkspace svg file not working on cricut?
« Last post by HeatherM on February 22, 2018, 07:48:54 PM »
I'm glad it's working for you now.   :)
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Help Using Inkscape / Re: Inkspace svg file not working on cricut?
« Last post by linen on February 22, 2018, 05:15:01 PM »
Thank you Heather.  I do have X11 installed but not sure of it's settings.  "Update Pasteboard when CLIPBOARD changes was checked so I deselected it and it worked!  You're wonderful!  Thank you!   I Appreciate your help.
4
Have you seen this page?  http://wiki.imal.org/howto/inkscape-and-lasercutter  Hopefully there is something there that will help.
Thank you HeatherM, I will take a look.
5
Help Using Inkscape / Re: Inkspace svg file not working on cricut?
« Last post by HeatherM on February 21, 2018, 06:23:39 PM »
Yes, it matters that you are using a Mac.  Mac's convert vectors to images in the clipboard unless told not to. (or something like that)  Do you have XQuartz/X11 installed?  You need to have the following settings in your X11 preferences.
Screen Shot 2018-02-21 at 8.20.10 PM.png
*Screen Shot 2018-02-21 at 8.20.10 PM.png
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6
Help Using Inkscape / Re: Inkspace svg file not working on cricut?
« Last post by linen on February 21, 2018, 04:07:20 PM »
I am also VERY new at both Cricut and Inkscape but am having the same problem. 

I uploaded a large SVG file into Inkscape with multiple images in groups which I wanted to separate into individual smaller files.  After ungrouping the larger file, selecting one of the objects, grouping it back and copying it, I pasted it into a new file in Inkscape, then saved it as a plain svg file (and also tried the Inkscape SVG) .  It saves as an SVG file; however, when I attempt to open it in Cricut Design Space I get this error message:

"The uploaded SVG contained the following items that are not supported: Unsupported image type ". 

In an attempt to trouble shoot the problem, this is what I noticed...

When the selected object has been ungrouped, on the original file in Inkscape, the Inkscape bar at the bottom still recognizes it as  " a # of objects in a group".  Once I save it and paste it into the  new Inkscape file,  the bar at the bottom  no longer recognizes it as  a group of objects but instead changes it to an image.  I might add that last week I  used the same document and separated out several of the smaller images (as groups) and saved them as AVG files successfully and they opened in Design Space with no problem complete with various layers.  I reopened one of them in Inkscape today out of curiosity and it opened with all the various objects/layers but as soon as I copied and pasted it to  a new file - converted to an image with no groups.  I don't know what has changed.  Can someone please help?    (in case it matters - Using a Mac book Pro, working in Chrome)'  Thanks.
7
Hello and welcome!  Have you seen this page?  http://wiki.imal.org/howto/inkscape-and-lasercutter  Hopefully there is something there that will help.

Sadly, dxf files are very heavy on nodes for curves and there isn't much that you can do about it in Inkscape.
8
Hello. Thanks to all the people that help others in this forum.

I have a problem when exporting from Inkscape to a laser cutting file format (dxf, hpgl and plt).

I often import an image into Inkscape (jpg, png, etc.) and use Trace Bitmap to convert it to paths. Depending on the original image I use Brightness cutoff, Edge Detection or Colors (multiple scans) to trace the bitmap.

The laser cutter is a CamFive, and the software is SmartCarve 4.3. It takes dxf, hpgl or plt files.

I have Inkscape 0.92 on a windows 7 computer, and the Uniconvertor installed (https://sk1project.net/modules.php?name=Products&product=uniconvertor&op=download).

For this post I took an image (http://www.supercoloring.com/coloring-pages/toy-train) and traced the bitmap using Brightness cutoff, Edge Detection and Colors (multiple scans). Then, I exported to the 3 file formats (dxf, hpgl and plt).

When I import each file into SmartCarve I get this:


dxf format is very useful because I can use it with technical drawing software (LibreCAD).
hpgl looks clean but it has many small lines when you zoom in.
plt sometimes works well, but not always (also most of our computers at the school have linux based OS, and plt exporting is not working on those).

I use dxf more often, but then I have to cut lines and erase nodes on SmartCarve to clean the image.

Does anyone have an idea about what causes this problem, or about the solution?

Thank you all.

Here you can see the detail of each format:

DXF:


HPGL:


hpgl zoomed in:


PLT:
9
Another option, besides using auto-trace (Trace Bitmap) is to trace the image using the Pen/Bezier tool.  It depends on how much time you have, and how complicated the image is, as to whether you want to try tracing with Pen/Bezier tool or use auto-trace.
10
I don't know what method Carolyn used and she isn't online anymore.  Here are links to her blog and her Youtube channel so you can look around.  http://cuttwopieces.blogspot.com.au/ and https://www.youtube.com/user/cuttingtimes/videos

So after looking at her file I would guess that she used the node tool to delete a segment on each end of the original line, then used Path/Break apart so that she could delete the extra section.

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