This is a common problem with OpenType Variable fonts. Many OTF Variable fonts will have overlapping features in letter strokes. Those overlaps must be removed before sending the lettering to something like a vinyl cutter/plotter or computer-driven routing table. The plotter blade or router bit will cut where ever a path is present.In CorelDRAW the Object>Shaping>Weld command usually does the trick immediately after a variable font text object is converted to curves. But if you break apart the text object or do other things to it removing the overlaps later is more difficult. Corel just needs to update the weld function where it works a little more like it does in Adobe Illustrator; if you have non-zero winding on an overlapping object the overlaps will fill in solid when welded. There was a handy "xtra" in Macromedia Freehand, a ''remove overlap" button on the Xtras panel. Back then the xtra was handy for removing overlaps in object line strokes that had been converted into editable paths.
Bobby Henderson said:This is a common problem with OpenType Variable fonts. Many OTF Variable fonts will have overlapping features in letter strokes.
I agree. Somehow i don't like the Variable fonts how it works in Coreldraw, the static fonts works much better.
OpenType Variable fonts are a good thing, but they do have their hazards. The overlapping strokes is one problem. Not all variable fonts are made that way. Nevertheless it's important to inspect artwork in wireframe view just to be sure. Some OTF Var fonts can be a bit buggy in how well they interpolate their variable instances. Zones like the mid point in a "S" glyph can get marred with little dents. Software updates for fonts is becoming more common to fix issues like that. For some odd reason CorelDRAW has a rough time handling the Helvetica Now Variable font. It can bring an older computer system to a crawl. None of the other variable fonts I have are quite so demanding.The upshot with Variable fonts is they bring back the nifty concepts of the defunct Multiple Master font format and combine them with the vastly expanded character set capability of OpenType. It opens a lot more design flexibility with type.