I am a beginner, please help me

The reason it cuts "around" the line: your cutter follows every edge of every path. When Image Trace turns a thick line from a photo into vectors, that line becomes a filled shape with two edges (inside and outside), so the machine cuts both. You have two options, depending on what you want:

A) You want one solid piece cut out (the most common case):
1. Image Trace with the "Silhouettes" or "Black and White" preset, then Object > Expand.
2. Select everything and use Pathfinder > Unite so it becomes one solid shape.
3. Open the result in Outline view (Ctrl/Cmd+Y) and delete any inner paths you don't want cut.
4. Now only the outer edge is left, so the CM300 cuts it once.

B) You want the machine to cut along the middle of the line:
1. Put the photo on a locked layer.
2. Draw over the centre of the line with the Pen tool. Set it to stroke only, no fill.
3. Delete the photo and the traced shapes, and save as SVG.

Either way, check in Outline view before saving: every line you see there is a line the machine will cut. Then import the SVG into CanvasWorkspace and confirm the size before sending it to the CM300.

(Disclosure: I run Pixel Print Co. If you'd rather not do this in Illustrator, our free Vinyl Decal Builder runs in the browser, supports Brother ScanNCut, exports SVG for CanvasWorkspace and flags parts that are too thin to cut: https://pixelprintco.ca/tools/vinyl-decal-builder/)

Gabor,

“Sorry, I have never used Illustrator before and am only using it because of my new cutting machine.”

I am afraid you need to plunge into a deeper learning.

It would be most efficient to learn draw things as clean vector paths in Ai which is easier to learn than it might seem, not by trying to find tutorials, but with the help of the documentation.

You can create a closed stroke/no fill path ready for cutting as the one here,

by using a combination of (5) Rectangles, half an Ellipse and some moving/adding and moving of Anchor Points.

Given what you had to start with as shown in your OP (Original Post), I believe it is doable to get through the steps mentioned earlier and repeated below, however not by trying to find tutorials (which will not show those steps in any case), but by going through each step with the help of the documentation, using the actual terms such as Compound Path.

1)) Copy the Compound Outer Path, then hide all the artwork except for the copy;

2)) Select the copy Compound Outer Path and switch from Fill to Stroke so you can see what you are doing;

3)) Delete the inner path so you are left with only the outer path; this is your outer rim path;

4)) Give the outer rim path the Stroke Weight/Colour or whichever properties needed for your cutting machine.

Thank you all for your help.

I tried to answer all of you, but somehow all my replies disappeared.

I don't know why.

Here is another image from my new project.

I made it in Photoshop, saved it as a PDF and then created an SVG in Illustrator. I followed this YouTube tutorial: [link to YouTube tutorial].

I chose black and white.

Then I use Brother CanvasWorkSpace to create a cut-ready file.

What is the red line in Photoshop for? The machine cuts twice.

This is supposed to be a packaging box?

You might not want to use Image Trace on your raster image, because it could become inprecise. This is something you would need to try out.

After Image Tracing you need to expand the result before you get actual paths. But then you probably also need to delete the inside lines which should not be cut. 

Gabor,

Based on a second reading, I believe you may have used Live Trace, and that has turned the thick outer  line into a filled Compound Path which is then cut out, and instead you wish to cut the whole cat out in one piece including the thick outer line, in other words a cut that follows the outer rim?

If that is the case, you can:

1)) Copy the Compound Outer Path, then hide all the artwork except for the copy;

2)) Select the copy Compound Outer Path and switch from Fill to Stroke so you can see what yuou are doing;

3)) Delete the inner path so you are left with only the outer path; this is your outer rim path;

4)) Give the outer rim path the Stroke Weight/Colour or whichever properties needed for your cutting machine.

I am unsure how you wish to treat the smaller thick non compound paths.

Hi ​@Gabor22773582n1bc,

For everything that you want as a cut path, you’ll need it to be a single path (stroke) - not a fill. Your blue lines need a stroke colour applied so you can see them.

Gabor,

How did you (try to) create the SVG, the photo you start with being a raster image?