Hey all!
I recently compared 9 different free CAD programs (several of which you brought my attention to!) and found that, although there's no perfect solution, many are actually quite capable.
I've put together a new video course on how to model a Maker coin in several of the more powerful offerings, and it's free to community members here . (let me know if you have any issues with access)
There are tutorials for Onshape and Autodesk Fusion so far, with many more to come!
In case you missed it, you can watch the full CAD comparison video here.
Happy printing!
Angus ~ Maker's Muse
Richard Milewski
I was a bit disappointed that you didn't include OpenSCAD in your review. Admittedly, OpenSCAD can be daunting, but with the BOSL2 Library you can make a coin in 25 lines of code. Both OpenSCAD and the BOSL2 library are 100% free and open source. No big corporation can ever change the rules with a new EULA in a routine update.
include
include
$fn = 144;
function cpd(r) = r (4/3) tan(180/8); // Control pt distance for quarter round.
r1 = 25; // Major radius of the coin
r2= 5; // radius of the edge
cz = 1; // center z
body = bezpath_curve(flatten([
bez_begin([0, -r2], RIGHT, 10),
bez_tang ([r1-r2,-r2], 0, cpd(r2)),
bez_tang ([r1,0], 90, cpd(r2)),
bez_tang ([r1-r2, r2], 180, cpd(r2)),
bez_end([0,cz], RIGHT, 12),
]));
diff(){
rotate_sweep(body,360);
zrot_copies(n = 8, r = r1 + r2 -1)
tag("remove") cyl(h = r2*2, r = 8);
tag("remove") text3d("OS", font = "Arial:bold", size = 14, h = r2, anchor = CENTER+BOT, atype = "ycenter");
}