# 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) -> None:
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=2,
help="size of teeth (diameter / #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 percent 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(f"Pitch radius 1: {r1:.1f}mm\n"
f"Outer diameter 1: {d1:.1f}mm\n"
f"Pitch radius 2: {r2:.1f}mm\n"
f"Outer diameter 2: {d2:.1f}mm\n"
f"Axis distance: {r1 + r2:.1f}mm\n",
align="bottom left")
