Letter clay mold / stamp

letter-mold-stamp.scad

font = "DejaVu Sans:style=Bold";
letter_size = 40;
height = 8;

string = "DEV";
textlen = len(string);

box_width = letter_size*textlen*1.1;
box_height = letter_size*1.2;

module mytext() {
    text(string, size = letter_size, font = font, halign = "center", valign = "center", $fn = 64);
}

module base() {
    linear_extrude(1) {
        square([box_width, box_height], center = true);
    }
}

module text_outline() {
    linear_extrude(height) {
        difference() {
            offset(r = -1) {
                mytext();
            }
            offset(r = -2) {
                mytext();
            }
        }
    } 
}

rotate([-180,0,0])
union() {   
    text_outline();
    translate([0,0,height])  base();
}

You may need to change the font to a font supported by your system. Check the OpenScad menu Help -> Font List for a list of available fonts.

Quick Instructions:

1. Open the code on OpenScad.
2. Change the string variable to the letter / word of your choice.
3. Adjust the height if necessary.
4. Hit F5 for previewing.
5. When satisfied, build (F6) and export the STL file for printing.