Text engraving leaving bare areas

I am experimenting engraving text on 6061 anodized aluminum using a 90 degree diamond drag bit. My first experiment is engraving the letter A with a height of 5mm.

I’m engraving the letter with two toolpaths - A contour to outline the letter and a pocket to fill in the inside area. What’s happening is that the intersection of the horizontal and vertical parts of the letter are not being engraved. The toolpath shows these blank areas.

What do I need to do to get the entire inside of the letter engraved? Images attached.

BTW I tried using the MC Etcher 120 and it did a poor job of engraving, smearing metal on the outside of the letter.

Design
ADesign

Toolpath
AToolpath

Engraving

The two sections of the letter can be connected by using boolean addition. May I ask why are you not using a textual letter (maybe turned into curves).!

Single letter (Arial typeface) turned into curves then engraving toolpath

1 Like

The font I was using, Bahnschrift, creates the letter with two parts. When I select the character in design mode the Boolean operations do not appear.

I’m new at this and did not know a using texture would be a better option.

1 Like

To convert Text to Curves (which can have Boolean operations applied), select the text, then perform ‘Offset Vectors’ on it, using a very small offset (for example, 0.0001 mm) - inside or outside doesn’t matter. Then, IMMEDIATELY ‘grab’ the selected objects and move them - this will move the ‘curves’ away from the text object.

You can use boolean operations on the new ‘Curves’.

I see. The typeface I had used to demonstrate the simplicity of the technique is very similar in profile to the Bahnschrift family, especially for the letter, ‘A’. As you have only shown the letter ‘A’ that was all I could use to inform me about what was required.

The font family is interesting in that it is a recently digitised typeface designed by Microsoft to be compliant with the DIN 1451 standard. Text in this font has one unusual characteristic. Regardless of the weight of the typeface used for a line of the same text, the line length will always be the same between the different weights in the family.

Notice how in the weight/axis illustration, the counter (the space enclosed by the crossbar) between the angled strokes defining the letter ‘A’ and the crossbar is variable. Once you have created curves from your text elements, the text itself becomes editable like any vector illustration. It is a useful attribute because a recipient does not have to own the typeface you have selected, in order to read it.

My judgement in this particular case was that Arial (as curves) would provide you with a near enough typeface and you could potentially edit it to make it fit your purposes.

This has gotten easier in the new CC6 beta, see:

https://carbide3d.com/blog/merging-script-fonts-in-carbide-create/