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/* demo for using gcmc file with [py]ngcgui
//ngcgui: info: WHEELS (gcmc G-Code Meta Compiler)
//ngcgui: umode = 1; //, units: 1:mm, 0:inch
//ngcgui: r1=10; //,Radius 1 (10mm = .39370 in)
//ngcgui: r2= 5; //,Radius 2 ( 5mm = .19685 in)
//ngcgui: r3= 3.333; //,Radius 3 ( 3.333mm = .13122 in)
//ngcgui: s1= 1 ,Speed 1 (ratio, nounits)
//ngcgui: s2= 7 ,Speed 2 (ratio, nounits)
//ngcgui: s3= -17 ,Speed 3 (ratio, nounits)
//ngcgui: p1= 0 ,Phase 1 (angle, degrees)
//ngcgui: p2= 0 ,Phase 2 (angle, degrees)
//ngcgui: p3= 90 ,Phase 3 (angle, degrees)
//ngcgui: zsafe = 1; //, zsafe
//ngcgui: zcut = -1; //, zcut (neg)
//ngcgui: xoffset = 0;
//ngcgui: yoffset = 0;
//ngcgui: scalex = 5;
//ngcgui: scaley = 5;
//ngcgui: scalez = 1;
//ngcgui: frate = 60; //, feedrate
//ngcgui: verbose = 0; // precede ensure_units
*/
include("ensure_units.gcmc"); //avoid preamble conflict
/*
Copyright: 2013
Author: Alan Battersby <alan.battersby@virginmedia.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/********************************************************/
/* Code to produce wheels paths */
/* Using GCMC Compiler */
/* Author: Alan Battersby */
/* Version: 1.0 */
/********************************************************/
/********************************************************/
/* Each wheel is a vector of three components */
/* Radius - The radius of the wheel */
/* Speed - The speed of the wheel */
/* Phase - The phase of the wheel */
function Radius(wheel)
{
return wheel[0];
}
function Speed(wheel)
{
return wheel[1];
}
function Phase(wheel)
{
return wheel[2];
}
function CreateWheel(r, s, p)
{
return [r,s,p];
}
/* Wheels are held in global vector list called wheels */
function CalcPoint(wheels, angle)
{
local at, posn, r, s, p, w;
posn = [0, 0];
foreach (wheels; w)
{
r = Radius(w);
s = Speed(w);
p = Phase(w);
at = s * angle + p;
posn += [r * cos(at), r * sin(at) ];
}
return posn;
}
function CutPath(wheels, start, inc, end, cdepth, scale)
{
local angle, point;
/* move to first point at safe height */
for(angle = start; angle <= end; angle += inc)
{
if (angle == start)
{
/* we should be at safe height */
/* so move to cutting depth */
point = scale(CalcPoint(wheels, angle), scale);
goto(point + theoffset);
goto([-,-,cdepth * scale[2]]);
}
else
{
point = scale(CalcPoint(wheels, angle), scale);
move(point + theoffset);
}
}
}
/******************* Library ****************************/
function GoAtSafeHeight(x,y)
{
goto([-,-,safeheight]);
goto([x,y,safeheight]);
}
/******************* main program ***********************/
if (umode == 1) {
zero = 0.0mm;
} else {
zero = 0.0in;
}
// ngcgui entries are unitless so these additions are used
// to ensure 1) floatingpoint and 2) units per umode setting
xoffset = zero + xoffset;
yoffset = zero + yoffset;
zsafe = zero + zsafe;
zcut = zero + zcut;
r1 = zero + r1;
r2 = zero + r2;
r3 = zero + r3;
s1 = 0.0 + s1; //angular speed ratio (unitless)
s2 = 0.0 + s2; //angular speed ratio (unitless)
s3 = 0.0 + s3; //angular speed ratio (unitless)
theoffset = [xoffset, yoffset];
safeheight = zsafe;
cuttingdepth = zcut;
svec = [scalex, scaley ,scalez ];
wheels = {
CreateWheel(r1, s1, p1 * 1deg),
CreateWheel(r2, s2, p2 * 1deg),
CreateWheel(r3, s3, p3 * 1deg)
};
feedrate(frate);
GoAtSafeHeight(0, 0);
CutPath(wheels, 0deg, 0.01deg, 360deg, cuttingdepth, svec);
GoAtSafeHeight(0, 0);
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