cnc-v2/utils.py

453 lines
12 KiB
Python

import math
import cadquery as cq
from ocp_vscode import *
import localselectors
class SFU1204:
def __init__(self, base, l):
self.w = base.workplane()
self.len = l
def ballscrew(self):
profile = [
(0, 0),
(0, 8/2),
(15, 8/2),
(15, 10/2),
(15+16, 10/2),
(15+39, 10/2),
(15+39, 12/2),
(self.len - 10, 12/2),
(self.len - 10, 8/2),
(self.len, 8/2),
(self.len, 0),
]
w = self.w.moveTo(0, 0)
for v in profile[1:]:
w = w.lineTo(v[1], v[0])
w = w.close()
return w.revolve()
def nut(self, x):
w = self.w.transformed(offset=(0, x, 0), rotate=(90, 0, 0))
n = (w.sketch()
.circle(40/2)
.circle(12/2, mode='s')
.rect(42, 30, mode='i')
.finalize()
.extrude(10)
.faces(">z")
.workplane()
.tag("nut_face")
.sketch()
.circle(22/2)
.circle(12/2, mode='s')
.finalize()
.extrude(25))
hole_r = 32/2
hole_pts = [
(hole_r*math.cos(angle*math.pi/180),
hole_r*math.sin(angle*math.pi/180)) for angle in
[-45, 0, 45, 180-45, 180, 180+45]]
n = (n.workplaneFromTagged("nut_face")
.pushPoints(hole_pts)
.hole(4.8)
)
return n
def nutHoles(self, solid, x):
w = self.w.transformed(offset=(0, x, 0), rotate=(90, 0, 0))
hole_r = 32/2
hole_pts = [
(hole_r*math.cos(angle*math.pi/180),
hole_r*math.sin(angle*math.pi/180)) for angle in
[-45, 0, 45, 180-45, 180, 180+45]]
solid = (solid.copyWorkplane(w)
.pushPoints(hole_pts)
.hole(4.8))
return solid
def fixedBearing(self):
d1 = 12
L = 25
L1 = 5
L2 = 29
L3 = 5
C1 = 13
C2 = 6
B = 60
H = 43
b = 30
h = 25
B1 = 34
H1 = 32.5
E = 18
P = 46
d2 = 5.5
X = 6.6
Y = 10.8
Z = 1.5
w = self.w.transformed(offset=(0, 39+15-L, 0), rotate=(-90, 0, 0))
w2 = w.transformed(offset=(0, (H-H1)/2, 0))
bearing = (w
.rect(B1, B1)
.extrude(L1+L)
.copyWorkplane(w2)
.rect(B, H1)
.extrude(L)
.copyWorkplane(w.transformed(rotate=(180, 0, 0)))
.hole(d1)
.copyWorkplane(w2.transformed(rotate=(180, 0, 0)))
.rect(P, E, forConstruction=True)
.vertices()
.hole(d2)
)
# TODO the holes on the top surface
return bearing
def fixedBearingHoles(self, solid):
d1 = 12
L = 25
L1 = 5
L2 = 29
L3 = 5
C1 = 13
C2 = 6
B = 60
H = 43
b = 30
h = 25
B1 = 34
H1 = 32.5
E = 18
P = 46
d2 = 5.5
X = 6.6
Y = 10.8
Z = 1.5
w = self.w.transformed(offset=(0, 39+15-L, -(H-H1)/2), rotate=(-90, 0, 0))
return (solid
.copyWorkplane(w)
.rect(P, E, forConstruction=True)
.vertices()
.hole(d2)
)
def floatingBearing(self):
d1 = 10
L = 20
B = 60
H = 43
b = 30
h = 25
B1 = 34
H1 = 32.5
E = 18
P = 46
d2 = 5.5
X = 6.6
Y = 10.8
Z = 1.5
w = self.w.transformed(offset=(0, self.len-10, 0), rotate=(-90, 0, 0))
b = (w
.rect(B1, B1)
.extrude(L)
.faces(">z")
.workplane()
.tag("floating_far_end")
.copyWorkplane(w)
.center(0, (H-H1)/2)
.rect(B, H1)
.extrude(L)
.workplaneFromTagged("floating_far_end")
.hole(d1)
.workplaneFromTagged("floating_far_end")
.center(0, -(H-H1)/2)
.rect(P, E, forConstruction=True)
.vertices()
.hole(d2)
)
return b
def floatingBearingHoles(self, solid):
d1 = 10
L = 20
B = 60
H = 43
b = 30
h = 25
B1 = 34
H1 = 32.5
E = 18
P = 46
d2 = 5.5
X = 6.6
Y = 10.8
Z = 1.5
w = self.w.transformed(offset=(0, self.len-10+L, 0), rotate=(90, 0, 0))
solid = (solid
.copyWorkplane(w)
.center(0, -(H-H1)/2)
.rect(P, E, forConstruction=True)
.vertices()
.hole(d2)
)
return solid
# it's oriented along the y axis of the given base plane
class HGR20:
def __init__(self, base, l):
self.base = base.workplane()
self.l = l
def holes(self, w):
pts = []
x = 20
while x < self.l + 1e-6:
pts.append((x - self.l/2, 0))
x += 60
w = (w.copyWorkplane(self.base)
.transformed(offset=(0,0,17))
.pushPoints(pts)
.hole(5))
return w
def rail_sketch(s = None):
# pixel coordinates based on a picture in the Hiwin's
# linear rail guidebook
hgr_profile = [
(0, 0),
(37, 0),
(37 + 6, 6),
(96 - 6, 6),
(96, 0),
(186-17, 0),
(186, 17),
(186, 76),
(129, 133),
(129, 59 + 133),
(129 + 20, 59 + 133 + 20),
#(31, 129 + 20 + 31, 133 + 20 + 31),
(186 - 6, 316 - 42 - 25 - 6),
(186, 316 - 42 - 25),
(186, 316 - 42),
(186 - 6, 316 - 42 + 6 - 1),
(31, 186 - 6 - 31, 316 - 6 - 1),
(143 + 6, 316 - 6),
(143, 316),
(0, 316)
]
scale = (10/186*17/316)**0.5
scaled_profile = [tuple((scale * v for v in vals)) for vals in hgr_profile]
if s is None:
s = cq.Sketch()
s = s.segment((0, 0), scaled_profile[1])
# TODO do arcs correctly
for v in scaled_profile[2:]:
if len(v) == 2:
s = s.segment(v)
else:
s = s.segment(v[1:])
for v in scaled_profile[-2:0:-1]:
if len(v) == 2:
s = s.segment((-v[0], v[1]))
else:
s = s.segment((-v[1], v[2]))
s = s.segment((0, 0))
return s
def rail(self): # workplane or face to use, length of rail
# TODO rotate w
xy = cq.Workplane().copyWorkplane(self.base)
w = xy.transformed((90, 90, 0), (-self.l/2, 0, 0))
w = w.placeSketch(HGR20.rail_sketch().assemble())
w = w.extrude(self.l)
x = 20
pts = []
while x < self.l:
pts.append((x-self.l/2, 0))
x += 60
#print("points", pts)
w = (w.copyWorkplane(xy)
.transformed(offset=(0,0,17))
.pushPoints(pts)
.hole(5)) # TODO replace with counterbore and get proper diameter
return w
W = 44
H = 30
H1 = 4.6
L = 77.5
L1 = 50.1 # for HGH20CA, TODO deal with variations
B = 32
C = 36
l = 5 # M5x6
T = 6
def carriage(self, x): # HGH20CA
W = 44
H = 30
H1 = 4.6
L = 77.5
L1 = 50.1 # for HGH20CA, TODO deal with variations
B = 32
C = 36
l = 5 # M5x6
T = 6
xy = cq.Workplane().copyWorkplane(self.base)
w = xy.transformed((90, 90, 0), (-self.l/2 + x, 0, 0)).tag("endplane")
# TODO
s = (cq.Sketch()
.segment((W/2, H1), (W/2, H))
.segment((-W/2, H))
.segment((-W/2, H1))
.segment((W/2, H1))
.assemble()
)
s = s.face(HGR20.rail_sketch().assemble(), mode="s")
s2 = (cq.Sketch()
.segment((W/2, H1), (W/2, H-3))
.segment((-W/2, H-3))
.segment((-W/2, H1))
.segment((W/2, H1))
.assemble()
)
s2 = s2.face(HGR20.rail_sketch().assemble(), mode="s")
pts = []
def savePointsF(l, p):
l.append(p)
return p
#origin = w.workplane().plane.toWorldCoords(cq.Vector(0, 0, 0))
#norm = w.workplane().plane.toWorldCoords(cq.Vector(0, 1, 0))
#norm = norm - origin
#print(norm)
# FINALLY GOT THIS WORKING
w = (w.transformed((0, 0, 0), (0, 0, L/2-L1/2))
.placeSketch(s).extrude(L1)
.workplaneFromTagged("endplane")
.placeSketch(s2)
.extrude(L)
#.faces(cq.DirectionMinMaxSelector(norm, True))
.faces(">y")
.workplane()
.transformed((0, 0, 0), (L/2 + x, 0, 0))
.rect(C, B)
.tag("mountingholes")
.vertices() # carriage mounting holes are here!
#.extrude(20)
.hole(l, T)
)
return w
def carriageHoles(self, w, x):
W = 44
H = 30
H1 = 4.6
L = 77.5
L1 = 50.1 # for HGH20CA, TODO deal with variations
B = 32
C = 36
l = 5 # M5x6
T = 6
xy = cq.Workplane().copyWorkplane(self.base).transformed(offset=(0, 0, H))
holes = (xy.transformed((0, 0, 0), (-self.l/2+L/2 + x, 0, 0))
.rect(C, B)
.vertices()
.cylinder(1000, l/2)
)
w = (w.cut(holes))
return w
class Plate:
# TODO add standard thicknesses here
pass
def inch(x):
return 25.4*x
def tubing(l, x, y, w, workplane):
return (workplane
.placeSketch(cq.Sketch()
.rect(x, y)
.rect(x - 2*w, y-2*w, mode='s'))
.extrude(l))
if __name__ == "__main__":
plate = (cq.Workplane("XY")
.rect(200, 200)
.extrude(10)
.faces(">Z")
.workplane()
.tag("railmount")
.end()
)
hgr20 = HGR20(plate.workplaneFromTagged("railmount"), 300)
plate2 = hgr20.holes(plate)
hgrtest = hgr20.rail()
carriage = hgr20.carriage(0)
plate3 = (cq.Workplane("XY")
.copyWorkplane(carriage.workplaneFromTagged("mountingholes"))
.rect(200, 200)
.extrude(5)
)
plate3 = hgr20.carriageHoles(plate3, 0)
tube1 = tubing(500, inch(2), inch(1), inch(0.062), cq.Workplane("XZ"))
ball_screw = SFU1204(cq.Workplane(), 500)
#show_object(plate2)
#show_object(hgrtest)
#show_object(carriage)
#show_object(plate3)
#show_object(tube1)
show_object(ball_screw.ballscrew())
show_object(ball_screw.nut(200))
nut_holder = (cq.Workplane("XZ")
.transformed(offset=(0, 0, -200-50))
.rect(40, 30)
.extrude(50)
.faces(">z")
.hole(12.4)
)
nut_holder = ball_screw.nutHoles(nut_holder, 200)
fixed = ball_screw.fixedBearing()
show_object(nut_holder)
show_object(fixed)
bearing_holder = (cq.Workplane("XZ")
.transformed(offset=(0, 0, 0))
.rect(60, 80)
.extrude(20)
.faces(">z")
.hole(12.4)
)
bearing_holder = ball_screw.fixedBearingHoles(bearing_holder)
show_object(bearing_holder)
bearing2 = ball_screw.floatingBearing()
show_object(bearing2)
bearing_holder2 = (cq.Workplane("XZ")
.transformed(offset=(0, 0, -540))
.rect(60, 80)
.extrude(20)
.faces(">z")
.hole(12.4)
)
bearing_holder2 = ball_screw.floatingBearingHoles(bearing_holder2)
show_object(bearing_holder2)
#show_object(cq.Workplane().placeSketch(HGR20.rail_sketch().assemble()).extrude(10))