Skip to content

Instantly share code, notes, and snippets.

@gabonator

gabonator/half_inverse_sphere.html

Created June 15, 2013 07:41
Show Gist options
  • Star 0 You must be signed in to star a gist
  • Fork 0 You must be signed in to fork a gist
  • Save gabonator/5787291 to your computer and use it in GitHub Desktop.
Save gabonator/5787291 to your computer and use it in GitHub Desktop.
Download ZIP
CNC code that cuts half-sphere hole into plastic/wooden cube & that cuts half sphere out of cube, could be used for making mold for Ferrero Rafaello wafer :)
Raw
half_inverse_sphere.html
<html>
<body>
<pre id="console">
</pre>
<script language="javascript">
function log(s)
{
if ( typeof(s) == "string" )
document.getElementById("console").innerHTML += s + "\n";
else
{
var tmp = "";
for ( var i in s )
{
var code = String.toUpperCase(i);
var value = s[i].toString();
if ( value.length > 5 )
value = s[i].toFixed(3);
if ( code == "G" && value.length < 2 )
value = "0" + value;
tmp += code + value + " ";
}
document.getElementById("console").innerHTML += tmp + "\n";
// log(s);
}
}
function m100(f)
{
return Math.floor(f*100)*0.01;
}
var tool_diam = 3; // 3mm
var depth = -1.0; // 1mm do hlbky
var drill_feedrate = 10; // rychlost vrtania do hlbky
var route_feedrate = 50; // rychlost vrtania do hlbky
var circle_radius = 24/2;
var depth_step = 1/2; // mm
var outer_radius = circle_radius + 4;
log({ g:0, z:1.0 }); // vylez hore
//log({ g:0, x:0, y:-outer_radius }); // horna cast vyrezu
var lastz = 2;
for ( z=0; z<=circle_radius; z+=depth_step)
{
var r = m100( Math.sqrt(circle_radius*circle_radius-(circle_radius-z)*(circle_radius-z)) );
log("(kruh hlbka " + z.toFixed(2) + " polomer " + r.toFixed(2) + ")");
midcircle( r + tool_diam/2, outer_radius - tool_diam/2, depth-z );
}
log({g:0, z:1.0}); // vrat vrtak uplne hore
log({g:0, x:0, y:0}); // a pome do stredu
function midcircle( r1, r2, z )
{
log({ g:0, x:0, y:-r2 }); // priblizime sa ku materialu
log({ g:0, z:z+0.5 }); // priblizime sa ku materialu
log({ g:1, z:z, f:drill_feedrate }); // prvy zarez
var r, lastr = r2;
for ( r=r2; r>=r1; r-=tool_diam/2)
{
lastr = r;
log({ g:1, x:0, y:-r, f:drill_feedrate });
// circle
log({ g:2, x:-r, y:0, i:0, j:r, f:route_feedrate });
// [r, 0] => [0, r]
log({ g:2, x:0, y:r, i:+r, j:0 });
// [0, r] => [-r, 0]
log({ g:2, x:+r, y:0, i:0, j:-r });
// [-r, 0] => [0, -r]
log({ g:2, x:0, y:-r, i:-r, j:0 });
}
if ( lastr > r1 )
{
r = r1;
log({ g:1, x:0, y:-r, f:drill_feedrate });
// circle
log({ g:2, x:-r, y:0, i:0, j:r, f:route_feedrate });
// [r, 0] => [0, r]
log({ g:2, x:0, y:r, i:+r, j:0 });
// [0, r] => [-r, 0]
log({ g:2, x:+r, y:0, i:0, j:-r });
// [-r, 0] => [0, -r]
log({ g:2, x:0, y:-r, i:-r, j:0 });
}
log({ g:0, z:z+0.5 }); // pod hore
}
</script>
</body>
</html>
Raw
half_sphere.html
<html>
<body>
<pre id="console">
</pre>
<script language="javascript">
function log(s)
{
if ( typeof(s) == "string" )
document.getElementById("console").innerHTML += s + "\n";
else
{
var tmp = "";
for ( var i in s )
{
var code = String.toUpperCase(i);
var value = s[i].toString();
if ( value.length > 5 )
value = s[i].toFixed(3);
if ( code == "G" && value.length < 2 )
value = "0" + value;
tmp += code + value + " ";
}
document.getElementById("console").innerHTML += tmp + "\n";
// log(s);
}
}
var tool_diam = 3; // 3mm
var depth = -1.0; // 1mm do hlbky
var drill_feedrate = 10; // rychlost vrtania do hlbky
var route_feedrate = 30; // rychlost vrtania do hlbky
var circle_radius = 24/2;
var depth_step = 0.25;
log("G00 Z2.0"); // vylez hore
log({ x:0, y:0 });
var lastz = 2;
for ( z=0; z<=circle_radius; z+=depth_step)
{
var r;
var r2 = Math.floor(Math.sqrt(circle_radius*circle_radius-z*z)*100)/100;
log("(kruh hlbka " + z + " polomer " + r2 + ")");
if ( r2*2 < tool_diam )
continue;
var target_radius = r2-tool_diam/2;
var lastr = 0;
for ( r=0; r<=target_radius; r+= tool_diam/2 )
{
lastr = r;
if ( r==0 )
{
log({ z:depth-z+0.5 }); // priblizime sa ku materialu
log({ g:1, z:depth-z, f:drill_feedrate });
lastz = depth-z;
} else
{
log("G01"); // rezeme linearne
log({ x:0, y:-r, f:route_feedrate }); // ideme do hora na zaciatok kruznice
// log("G02"); // zaciname kruhovu trajektoriu
// [0, -r] => [r, 0]
log({ g:2, x:-r, y:0, i:0, j:r });
// [r, 0] => [0, r]
log({ g:2, x:0, y:r, i:+r, j:0 });
// [0, r] => [-r, 0]
log({ g:2, x:+r, y:0, i:0, j:-r });
// [-r, 0] => [0, -r]
if ( r+tool_diam/2 > target_radius )
{
var r2 = target_radius;
log({ g:2, x:0, y:-r2, i:-r, j:0 });
} else
{
// todo: prilis drasticke
var r2 = r + tool_diam/2;
log({ g:2, x:0, y:-r2, i:-r, j:0 });
}
}
}
// finish
log("(dosiahnuty polomer "+lastr+" ciel "+target_radius+")");
if ( lastr < target_radius )
{
log("(finisujem kruh)");
r = target_radius;
log("G01"); // rezeme linearne
log({ x:0, y:-r, f:route_feedrate }); // ideme do hora na zaciatok kruznice
log({ g:2, x:-r, y:0, i:0, j:r });
log({ g:2, x:0, y:r, i:+r, j:0 });
log({ g:2, x:+r, y:0, i:0, j:-r });
log({ g:2, x:0, y:-r, i:-r, j:0 });
}
log({g:0, z:lastz+1}); // vylez hore
log({g:0, x:0, y:0}); // vycentruj a priprav na dalsi rez
}
log({g:0, x:0, y:0, z:2.0}); // vrat vrtak uplne hore
</script>
</body>
</html>
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment