Source code for boxes.generators.gear

#!/usr/bin/env python3
# Copyright (C) 2013-2016 Florian Festi
#
#   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 3 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, see <http://www.gnu.org/licenses/>.

from boxes import *

[docs]class Gears(Boxes): """Gears""" ui_group = "Part" def __init__(self): Boxes.__init__(self) self.argparser.add_argument( "--teeth1", action="store", type=int, default=12, help="number of teeth") self.argparser.add_argument( "--shaft1", action="store", type=float, default=6., help="diameter of the shaft 1") self.argparser.add_argument( "--dpercentage1", action="store", type=float, default=75, help="percent of the D section of shaft 1 (100 for round shaft)") self.argparser.add_argument( "--teeth2", action="store", type=int, default=32, help="number of teeth in the other size of gears") self.argparser.add_argument( "--shaft2", action="store", type=float, default=0.0, help="diameter of the shaft2 (zero for same as shaft 1)") self.argparser.add_argument( "--dpercentage2", action="store", type=float, default=0, help="percent of the D section of shaft 1 (0 for same as shaft 1)") self.argparser.add_argument( "--modulus", action="store", type=float, default=5, help="width of teeth in mm") self.argparser.add_argument( "--pressure_angle", action="store", type=float, default=20, help="angle of the teeth touching (in degrees)") self.argparser.add_argument( "--profile_shift", action="store", type=float, default=20, help="in precent of the modulus") def render(self): # adjust to the variables you want in the local scope t = self.thickness self.teeth1 = max(2, self.teeth1) self.teeth2 = max(2, self.teeth2) if not self.shaft2: self.shaft2 = self.shaft1 if not self.dpercentage2: self.dpercentage2 = self.dpercentage1 self.gears(teeth=self.teeth2, dimension=self.modulus, angle=self.pressure_angle, profile_shift=self.profile_shift, callback=lambda:self.dHole(0, 0, d=self.shaft2, rel_w=self.dpercentage2/100.), move="up") r2, d2, d2 = self.gears.sizes( teeth=self.teeth2, dimension=self.modulus, angle=self.pressure_angle, profile_shift=self.profile_shift) self.gears(teeth=self.teeth1, dimension=self.modulus, angle=self.pressure_angle, profile_shift=self.profile_shift, callback=lambda:self.dHole(0, 0, d=self.shaft1, rel_w=self.dpercentage1/100.), move="up") r1, d1, d1 = self.gears.sizes( teeth=self.teeth1, dimension=self.modulus, angle=self.pressure_angle, profile_shift=self.profile_shift) r = max(self.shaft1, self.shaft2)/2 self.hole(t+r, t+r, self.shaft1/2) self.hole(t+r+r1+r2, t+r, self.shaft2/2) self.moveTo(0, 2*r+t) self.text("""Pitch radius 1: %.1fmm Outer diameter 1: %.1fmm Pitch radius 2: %.1fmm Outer diameter 2: %.1fmm Axis distance: %.1fmm """ % (r1, d1, r2, d2, r1+r2), align="bottom left")