How to make gaps or cut outs in lines for laser cutting in corel draw or rhino

[fractaledge3]

Hi Niklas,
There are two cases:
1- If the shapes on the sheet are just a repeats then just do that steps with the first shape then repeat it.
2-If the shapes on the sheet are not the same, then you should to apply that steps to every shape on the sheet or in some cases you can combine all the shapes then let the rectangle to intersect with them but don't forget to open the shapes.

Also take care with the shapes that has many shapes inside (Ex. letter B [it has two inner curves inside the outer curve]).

[fractaledge3]

Hi Niklas,
Here is another method for complicated shapes.

-Select the knife tool (use it to open any curve).
-Disable auto close-on cut (knife tool options on tool bar).
-Cut a point on each curve including the internal curves to open every curve.
-Get the half cut(gap) area using a rectangle(the previous steps that I post).

Osama

[Pete Stenabaugh]

Hey guys, why not just change the outline (that you would be using to cut the figure out) to a dashed line, with long dashes. In autocad you can change line types very easily, plus you can either make up your own custom lines, or just pick a dashed line type and change the line type scale. Changing the line type scale changes the length of the dashes and the spaces in the lines. To do this is likely about 20 seconds worth of work. Why bother trying to cut the line up with rectangles and so on, that is way too much time consumed for a simple process.

I am not too familiar with Corel yet, but I would imagine that you might be able to change the outline to a dashed line of some type.

I also like the idea of only cutting about 95% of the way through, except that this method could leave you with a lot of clean up to be done all the way around the edge. The other draw back to this is that you need a special power setting for every single type of material and thickness you come across, whereas the dashed line could get you through several types or thicknesses of material with one or two general settings.

Pete

[fractaledge3]

We need to cut the shape totally but we need to get some half cut area to keep that shape within its material like the wooden or acrylic kits, so The main problem in dashed line that there will be gaps in your shape, without cutting or half cutting those gaps the shape will not come out from the material.


Osama

[lamicron]

Hi Osama , there is another way to hold your cut pieces in place, cut it as a mirror (inverted , for the back side) some materials cut better this way and leave better shape, after you cut, put some contact vinyl adhesive over the plate and then you have the front of your product clean. Be sure to use a not aggressive glued tape or vinyl, you can use that blue one used to protect the acrilyc plates from scratches, it holds not to tigth and is easy to peel off
Luis

[fractaledge3]

Originally Posted by lamicron Hi Osama , there is another way to hold your cut pieces in place, cut it as a mirror (inverted , for the back side) some materials cut better this way and leave better shape, after you cut, put some contact vinyl adhesive over the plate and then you have the front of your product clean. Be sure to use a not aggressive glued tape or vinyl, you can use that blue one used to protect the acrilyc plates from scratches, it holds not to tigth and is easy to peel off Luis

Hi Luis,
Good idea [If accepted by Niklas ], We are using some kind of masking tape(used with vinyl as backup to remove and past) to do it .

[turmite]

Originally Posted by niklasn78 Thanks pointcloud Just wondering when i have close 2 points closer to each other, Howe do i cut the line between the dots?

niklasn78, I am not pointcloud, but I can help you with this. First the points must lay on the curve. If you will look at left side of your Rhino screen you will see two icons with small blue triangles. The left hand icon is for trim and the right hand icon is for split. When you mouse over the icon it will show the mouse button to use to select each function that icon allows. In the split icon use the left mouse button and the command line will ask you which object to select for splitting. Choose your curve with the points on it, and then right click the mouse. The command line will now ask you for the objects to be used for splitting the first object selected. Choose the two points and hit enter. You will now be able to zoom in and select the small section between the two points and delete it, and you're done.

Mike