CORRECTION : Initially I erroneously wrote that a 0.2mm nozzle was used; the sample prints were done with a 0.4mm nozzle.

These were created in preparation for a model I am working on that requires a large amount of raised text (printed in two colors via filament switching). I needed to determine the smallest practical text size that could be printed using a 0.4mm nozzle.

About the Prints 

In the first print, the number is the text height in mm, except that the line with the full set of numbers is size 3mm.

In the second and third prints, the first number in each line is the print size in mm; all subsequent characters on that line are in the same text size.  Note that fractional sizes are given as decimals, using a bullet (•) as a decimal point (I find the bullet “prints” better than a decimal point). 

Print Instructions

Print in PETG using the 3mf files provided. As noted above, I used a 0.4mm nozzle. I did not make any attempt to optimize the print parameters, so there is a good possibility that my results can be improved.

CAD

The OnShape 3D CAD files for this are here :

https://cad.onshape.com/documents/d753f5b654cb62d5d224e453/w/1a8c6ab21efb945889f229d2/e/7effb52cb9731b43cf7a81e3?renderMode=0&uiState=645a93c69465bf6239536df4