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#!/usr/bin/env python3
# Copyright (C) 2012 Jeff Epler <jepler@unpythonic.net>
#
# 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""
This program creates "torture test" ngc files. These include arcs (helices)
in any plane, straight feeds, and traverses all in a random order with
differing feeds.
Run the resulting file in a stepper inifile with no headroom, and kick
things up a notch by using different max velocities and accelerations.
Turning feed override past 100% has also helped turn up bugs.
"""
from random import *
from math import sin, cos, pi
distances = [-10,1,-.1,0,0,.1,1,10]
radii = [.1, 1, 10]
arcangles = range(0, 360, 45)
aangles = [-361,-89,-1,1,91,359]
chance_angular = .5
chance_angular_helix = .5
chance_lineaxis = .2
def feed():
"Half the time, change the feed rate"
if random() < .5: return
print("F%d" % randrange(100, 1000, 10), end=" ")
def torture_arc(x, y, z, a, b, c, u, v, w):
"Generate a random arc (helix)"
plane = randrange(3)
print("G%d" % (plane+17), end=" ")
direction = randrange(2)
print("G%d" % (direction+2), end=" ")
feed()
theta = choice(arcangles)
theta1 = choice(arcangles)
r = choice(radii)
q = choice(distances)
print("(%d %d)" % (theta*180/pi, theta1*180/pi), end=" ")
if plane == 0: # XY plane
ox = -cos(theta)*r
oy = -sin(theta)*r
print("I%f J%f" % (ox, oy), end=" ")
z = z + q
x = x + ox + cos(theta1)*r
y = y + oy + sin(theta1)*r
elif plane == 1: # XZ plane
ox = -cos(theta)*r
oz = -sin(theta)*r
print("I%f K%f" % (ox, oz), end=" ")
x = x + ox + sin(theta1)*r
z = z + oz + cos(theta1)*r
y = y + q
else: # YZ plane
oy = -cos(theta)*r
oz = -sin(theta)*r
print("J%f K%f" % (oy, oz), end=" ")
x = x + q
y = y + oy + cos(theta1)*r
z = z + oz + sin(theta1)*r
if random() < chance_angular_helix:
a = a + choice(aangles)
print("A%f" % a, end=" ")
if random() < chance_angular_helix:
b = b + choice(aangles)
print("B%f" % b, end=" ")
if random() < chance_angular_helix:
c = c + choice(aangles)
print("C%f" % c, end=" ")
if random() < chance_angular_helix:
u = u + randrange(-500, 500)/100.
print("U%f" % u, end=" ")
if random() < chance_angular_helix:
v = v + randrange(-500, 500)/100.
print("V%f" % v, end=" ")
if random() < chance_angular_helix:
w = w + randrange(-500, 500)/100.
print("W%f" % w, end=" ")
print("X%f Y%f Z%f" % (x, y, z))
return x, y, z, a, b, c, u, v, w
def torture_line(x, y, z, a, b, c, u, v, w):
"Generate a random traverse or straight feed"
kind = randrange(2)
p = ""
p += "G%d " % kind
if random() < chance_lineaxis:
x = x + randrange(-10, 11)/2.
p += "X%f " % x
if random() < chance_lineaxis:
y = y + randrange(-10, 11)/2.
p += "Y%f " % y
if random() < chance_lineaxis:
z = z + randrange(-10, 11)/2.
p += "Z%f " % z
if random() < chance_lineaxis:
a = a + randrange(-180, 80)/2.
p += "A%f " % a
if random() < chance_lineaxis:
b = b + randrange(-180, 80)/2.
p += "B%f " % b
if random() < chance_lineaxis:
c = c + randrange(-180, 80)/2.
p += "C%f " % c
if random() < chance_lineaxis:
u = u + randrange(-500, 500)/100.
p += "U%f " % u
if random() < chance_lineaxis:
v = v + randrange(-500, 500)/100.
p += "V%f " % v
if random() < chance_lineaxis:
w = w + randrange(-500, 500)/100.
p += "W%f " % w
if len(p) > 4:
if kind == 1: feed()
print(p)
return x, y, z, a, b, c, u, v, w
def torture_main(runs):
"""Generate random chains of movement several times, restarting near the
center each time motion gets too far away."""
funcs = [torture_line, torture_arc]
#funcs = [torture_arc]
def R(x,l=-50, k=50): return x < l or x > k
print("g21")
for i in range(runs):
x = y = 0
z = 20
a = b = c = u = v = w = 0
if chance_angular or chance_angular_helix:
print("G0 X0 Y0 A0 B0 C0 U0 V0 W0 Z20")
else:
print("G0 X0 Y0 Z20")
print("F100")
while 1:
x, y, z, a, b, c, u, v, w = choice(funcs)(x, y, z, a, b, c, u, v, w)
if (R(x) or R(y) or R(z,-10,30) or
R(a,-30000,30000) or R(b, -30000,30000) or R(c, -30000,30000) or
R(u) or R(v) or R(w)):
break
# Do ten runs then print m2
torture_main(20)
print("m2")
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