Hi guys thanks for responding. My kerf (as measured by using kerf measurement topic) is 0.125mm - this is on 5mm cast acrylic at the whatever the power speed are for this cut (I am currently away from my LightBurn machine). I have entered the full kerf as a positive offset are you saying I should only be entering half of that amount?
I do agree with your bullet points and hence my confusion… with NO kerf offset I would have expected the cut out to be wider (and it was) but also longer and it wasn’t. with no kerf the edges of the main piece and the key, when inserted together aligned perfectly albeit with a lot of vertical slop as shown by the “gap” in one of my pictures above.
I have removed the names from my project, I know what is in a name, but people are sensitive these days…
test.lbrn2 (63.6 KB)
Thanks again for taking the time to look at this.
Pete