def pulley_arms(height=40, through_screw='m4', arm_width=15, arm_thickness=7.5, pully_width=10, base_width=30, base_thickness=10, spin_clearance=0.5):
arm_base = so.translate((0,-arm_width/2.0,0))(so.cube((arm_thickness, arm_width, 1)))
arm = so.hull()(so.translate((0,0,height-arm_width/2.0))(so.rotate((0,90,0))(so.cylinder(r=arm_width/2.0, h=arm_thickness))) + arm_base)
def arms_xf_left(obj):
return so.translate(((pully_width + spin_clearance)/2.0,0,0))(obj)
def arms_xf_right(obj):
return so.translate((-(pully_width + spin_clearance)/2.0,0,0))(so.rotate((0,0,180))(obj))
arms = arms_xf_left(arm) + arms_xf_right(arm)
plate_orig = so.translate((-base_width/2.0,-base_width/2.0,-base_thickness))(so.cube((base_width, base_width, base_thickness)))
plate = so.hull()(plate_orig, so.translate((0,0,base_thickness/2.0))(arms_xf_left(arm_base)))
plate += so.hull()(plate_orig, so.translate((0,0,base_thickness/2.0))(arms_xf_right(arm_base)))
# add mount holes
spacing = arm_thickness*2.0+pully_width
bolt_hole = so.rotate((0,90,0))(so.translate((0,0,-spacing))(so.cylinder(r=screw_clearance[through_screw]/2.0, h=spacing*2.0)))
nut_recess = so.translate((-spacing/2.0,0,0))(so.rotate((0,90,0))(hex(screw_nut[through_screw]['width'], screw_nut[through_screw]['depth'])))
bolt_hole += nut_recess
head_recess = so.translate((spacing/2.0,0,0))(so.rotate((0,-90,0))(so.cylinder(r=screw_head_sink[through_screw]['diameter']/2.0, h=screw_head_sink[through_screw]['h'])))
bolt_hole += head_recess
arms -= so.translate((0,0,height-arm_width/2.0))(bolt_hole)
# add base mount hole
head_recess = so.translate((0,0,-5))(so.cylinder(r=screw_head_sink[through_screw]['diameter']/2.0, h=screw_head_sink[through_screw]['h']*base_thickness))
bolt_hole = so.translate((0,0,-base_thickness))(so.cylinder(r=screw_clearance[through_screw]/2.0, h=base_thickness*2.0))
bolt_hole += head_recess
return arms + plate - bolt_hole
def sizedipad(x, y, height):
"""Returns an iPad x,y size, with fixed size corners"""
o = hull()(
(ipadcorner(height)),
translate([0, y, 0])(rotate([0, 0, -90])((ipadcorner(height)))),
translate([x, y, 0])(rotate([0, 0, 180])((ipadcorner(height)))),
translate([x, 0, 0])(rotate([0, 0, 90])((ipadcorner(height)))),
translate([15, 15, 0])(cube([x - 30, y - 30, height])),
)
return o
def impl(scad):
body = None
for p in ps:
for o in ps[p]:
a = so.translate(([0]*p + [o * chamfer] + [0]*2)[:3])(scad)
if body is None:
body = a
else:
body += a
return so.hull()(body)
def hex(width, h, fillet_radius = 0.1):
"""
width is the distance between opposing flat sides
"""
r = width/2.0/cos(pi/6.0) # magic so that we have the width b/w flat faces instead of corners
pole = so.translate((r - fillet_radius, 0, 0))(so.cylinder(r=fillet_radius, h=h))
body = pole
for i in range(1,6):
body += so.rotate((0,0,60 * i))(pole)
return so.hull()(body)
def carraige_plate_install_holes(length = 200, angle=15, diameter=screw_head_sink['m3']['diameter']):
l = diameter
cut = so.cylinder(r=l/2.0, h=1)
off1 = length * sin(angle*pi/180)
off2 = length * cos(angle*pi/180)
body = None
for m in [1,-1]:
for t in [True, False]:
x,y = (m,0)
if t:
x,y=y,x
p1 = so.translate((y*41.0/2,x*34.5/2,0))(cut)
p2 = so.translate((y*(41.0/2+off1),x*(34.5/2+off1),off2))(cut)
p = so.hull()(p1,p2)
if body is None:
body = p
else:
body += p
return body
def hull(self) -> "SolidBuilder":
self._oso = hull()(self._oso)
return self