Those settings look okay to me. If you use width = 1, the pass overlap if ignored, because there is only one pass. Tool dia is the effective diameter, which depends on your tool. Assuming you did the calculation right, and the 30 degree tool with a flat tip width of 0.3mm at a depth of 0.015mm is 0.4mm wide, then everything is correct. If the CNC job looks okay in FlatCAM and is cut different in your machine, then you probably calculated the width wrong. I'm a little surprised by the 0.3mm V-bit. They are usually much narrower at the tip. Also, a depth of 0.015 seems very shallow. You mush have a very accurate machine. But I'm just guessing. Is the gap being cut 0.4 mm wide? Cheers, JP
I have the same problem with some traces, it eats some traces more than I want. How can I calculate all those?
If you assume that the width is correct so you can try to reduce the feed rate (in the case SOME trace are faulty). If all trace are faulty than your width (calculated or declared from the productor) aren't reliable.