Creating files for CNC milling to make Neon-LED signs
Testing the dimensions and bending possibilities
Inkscape tricks for file preparations
To test your design, check for sharp inner corners. There are these options "Inset" and "Outset", which can create a new path further outside or inside. The settings of the spacing ar somewhere deeply hidden in the preferences -> Behaviour -> Steps
Towards the inside, this will lead to sharper corners though and might reach the limit of corners.
But we found a better way with the following plugin (after failed tests with Fillet...)
Extension to make Rounded Corners: https://github.com/hawley577/Inkscape-Rounded-Corners
From our experience above a minimum radius of 4mm was feasible. so for the center line we need to add 9mm/2 = 8.5mm radius to make rounded Corners. If the shape is too small to even fit such a radius, the extension might not work, so just fix your design.
And after this you just set the stroke width to 9mm. And now choose "Stroke to Path" to generate the inner and outer paths for CNC.