Dimensioning text height in sketch

Anonymous · ‎01-17-2019

I have to engrave part numbers on parts. Specifications require +/- 0.005 tolerance.

The font I have to use is " G13f12d.shx". It is a single line font for engraving in the character type required.

When I enter in .250" in the font dialog the resulting letters are only .177" high, not .250.

I can't share the files because of NDA restrictions. However, I'm obviously not doing something right or am missing a key point about dimensioning text in sketches. If I try to dimension the letters with the dimensioning tool nothing is selectable about the letters. The help files are a cursory explanation of an intuitive casual application of text without tolerancing.

Any help is appreciated.

Chris

MRWakefield · ‎01-17-2019

I would guess the height you enter into the dialogue includes the ascenders and descenders. Try entering 0.353" for the text height and see how that looks.

If this answers your question please mark the thread as solved as it can help others find solutions in the future.
Marcus Wakefield

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Anonymous · ‎01-17-2019

.375" does "eyeball ok. But were dealing with precision here with tolerances. So, do you suggest any mathematical solution to choosing a height that is correct. Such as, is there a standard dimension for the ascenders and descenders in the font world? Or is this just a font design issue and the solution would be in deconstructing the font in Fontographer to create a more precise font.

Maybe Fusion Developers could look into this and provide a solution for precision regardless of the font design.

Maybe allowing snap points in the fonts for direct dimensioning.

Thanks For the help BTW.

MRWakefield · ‎01-17-2019

Yes, ±0.005" is a pretty tight tolerance for engraved text! Unfortunately (I believe) there are no standard ascender and descender heights for typefaces, they're whatever the designer decides, so there's no 'standard' scaling you can apply in all instances. I arrived at 0.353" by applying a scaling factor of 1.412 (ie 0.25/0.177) to your 0.25".

If this answers your question please mark the thread as solved as it can help others find solutions in the future.
Marcus Wakefield

____________________________________________________________________________________
I've created a Windows application (and now Mac as well) for creating custom thread files for Fusion. You can find out about it here. Hope you find it useful.
If you need to know how to offset threads for 3D printing then I've created a guide here which you might find useful.
If you would like to send me a tip for any help I've provided or for any of my software applications you've found useful, you can do this via my Ko-Fi page here.
____________________________________________________________________________________

etfrench · ‎01-17-2019

As @MRWakefield says, use a scaling factor. Every font and every height for that font may have a different scale factor. You can determine the scale factor by exploding the text, then measuring it.

ETFrench

Anonymous · ‎01-17-2019

Thank you for the help

i will try exploding and measuring . Then going forward I have a working size for my implementation.

chris

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Dimensioning text height in sketch

Dimensioning text height in sketch

Dimensioning text height in sketch