Odd behaviour when engraving.

[Ollie78]

Hi

I have been testing out my machine this week and doing some engraving using Fusion 360 and UCCNC. I started off with a 90 degree v bit and made a few name plaques for the kids and a couple of vector drawings. This all went fine and I was pleased with the results.
Today I tried some tiny 1/8th inch 30 degree cutters, the flat single edge ones. So first I just did a test just trying different sizes of font I went from 15mm high letters down to 1.5mm high. The cuts were very sharp indeed ( in american black walnut) and I could read down to the 2mm ones.

So I designed a sort of business card for some little off cuts. I did the toolpath 20000 rpm at 2000 mm/min posted it and ran it.
It looked fantastic, with super crisp lettering, then I noticed it had missed out 2 letters from my email address and one digit from my phone number. When I looked closely in UCCNC I could see it was missing in the toolpath there so checked 360 and sure enough it was not going into those missing letters.

I tried re-doing the toolpath but it was the same, missing two letter r`s and the number one. I can`t select the letters individually just the whole word or line so can`t correct this at the moment.
I changed the design a bit and the font and did another one, this time it missed out the letter h from the word telephone, nothing else.

Not sure what to do here, it can`t really be the font as the rest of the line in the same font and size is carving perfectly. Is there another way to select the engraving.

Another Fusion question is why sometimes in preview mode it shows me the 3d result of the cutting path and sometimes it doesn`t just shows the bit travelling but not the result, I don`t think it matters much but it is wierd. (probably one simple option to tick somewhere) .

Thanks

Ollie