98 lines
3.5 KiB
Python
98 lines
3.5 KiB
Python
# 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 *
|
|
|
|
|
|
class LaserClamp(Boxes):
|
|
"""A clamp to hold down material to a knife table"""
|
|
|
|
description = """You need a tension spring of the proper length to make the clamp work.
|
|
Increase extraheight to get more space for the spring and to make the
|
|
sliding mechanism less likely to bind. You may need to add some wax on the
|
|
parts sliding on each other to reduce friction.
|
|
"""
|
|
|
|
ui_group = "Misc"
|
|
|
|
def __init__(self) -> None:
|
|
Boxes.__init__(self)
|
|
|
|
self.addSettingsArgs(edges.FingerJointSettings, surroundingspaces=0)
|
|
self.argparser.add_argument(
|
|
"--minheight", action="store", type=float, default=25.,
|
|
help="minimal clamping height in mm")
|
|
self.argparser.add_argument(
|
|
"--maxheight", action="store", type=float, default=50.,
|
|
help="maximal clamping height in mm")
|
|
self.argparser.add_argument(
|
|
"--extraheight", action="store", type=float, default=0.,
|
|
help="extra height to make operation smoother in mm")
|
|
|
|
def topPart(self, l, move=None):
|
|
t = self. thickness
|
|
|
|
tw, th = 12*t, l+4*t
|
|
|
|
if self.move(tw, th, move, True):
|
|
return
|
|
|
|
self.moveTo(8*t, 0)
|
|
self.rectangularHole(t, 2*t+l/2, 1.05*t, l)
|
|
self.polyline(2*t, (90, t), l+1.5*t, (-90, 0.5*t),
|
|
2*t, -90, 0, (180, 0.5*t), 0,
|
|
(90, 1.5*t), 9*t,
|
|
(180, 4*t), 2*t, (-90, t))
|
|
self.hole(-5*t, -3*t, 2.5*t)
|
|
self.polyline(l-5.5*t, (90, t))
|
|
self.move(tw, th, move)
|
|
|
|
def bottomPart(self, h_min, h_extra, move=None):
|
|
t = self. thickness
|
|
|
|
tw, th = 14*t, h_min+4*t
|
|
|
|
if self.move(tw, th, move, True):
|
|
return
|
|
|
|
ls = t/2*(2**.5)
|
|
self.moveTo(2*t, 0)
|
|
self.fingerHolesAt(3*t, 2*t, h_min+h_extra, 90)
|
|
if h_extra:
|
|
self.polyline(4*t, (90,t), h_extra-2*t, (-90, t))
|
|
else:
|
|
self.polyline(6*t)
|
|
self.polyline(4*t, (90, 2*t), 3*t, 135, 2*ls, 45, 1*t, -90, 6*t, -90)
|
|
|
|
self.polyline(h_min, (90, t), 2*t, (90, t),
|
|
h_min+h_extra-0*t, (-90, t), t, (180, t),
|
|
0, 90, 0, (-180, 0.5*t), 0 , 90)
|
|
|
|
self.move(tw, th, move)
|
|
|
|
def render(self):
|
|
t = self. thickness
|
|
h_max, h_min, h_extra = self.maxheight, self.minheight,self.extraheight
|
|
|
|
if h_extra and h_extra < 2*t:
|
|
h_extra = 2*t
|
|
|
|
self.topPart(h_max+h_extra, move="right")
|
|
self.bottomPart(h_min, h_extra, move="right")
|
|
self.roundedPlate(4*t, h_min+h_extra+4*t, edge="e", r=t,
|
|
extend_corners=False, move="right",
|
|
callback=[lambda: self.fingerHolesAt(1*t, 2*t, h_min+h_extra)])
|
|
self.rectangularWall(1.1*t, h_min+h_extra, "efef")
|