def make_thing(self, nx=5, ny=5):
s = self
co = "CenterOfBoundBox"
fudge = 1
unit_x = s.x_nom + s.xy_extra + s.x_spacing
unit_y = s.y_nom + s.xy_extra + s.y_spacing
x_len = nx * unit_x
y_len = ny * unit_y
z_len = s.shelf_height + s.wall_height
one_void = CQ().box(s.x_nom + s.xy_extra,
s.y_nom + s.xy_extra,
s.shelf_height,
centered=(True, True, False)).edges("|Z").fillet(
s.cut_tool_diameter / 2)
tweezer_void = CQ().box(unit_x + fudge,
s.tweezer_allowance_width,
s.wall_height + s.tweezer_allowance_depth,
centered=(True, True, False))
CQ.undercutRelief2D = tbutil.undercutRelief2D
h00 = CQ().box(x_len, y_len, z_len,
centered=(True, True, False)) # limits box
#h01 = h00.faces('>Z').workplane().rarray(x_len/nx, y_len/ny, nx, ny, center=True).rect(unit_x+fudge, s.tweezer_allowance_width).cutBlind(-s.wall_height-s.tweezer_allowance_depth) # x tweezer cuts
#h02 = h01.faces('>Z').workplane().rarray(x_len/nx, y_len/ny, nx, ny, center=True).rect(s.tweezer_allowance_width, unit_y+fudge).cutBlind(-s.wall_height-s.tweezer_allowance_depth) # y tweezer cuts
h01 = h00.faces('>Z').workplane().rarray(
x_len / nx, y_len / ny, nx, ny, center=True).undercutRelief2D(
s.y_nom + s.xy_extra,
s.y_nom + s.xy_extra,
diameter=s.cut_tool_diameter).cutBlind(
-s.wall_height) # substrate pockets
all_voids = h00.faces('<Z').workplane(invert=True).rarray(
x_len / nx, y_len / ny, nx, ny, center=True).eachpoint(
lambda l: one_void.val().located(l)) # voids under
h02 = h01.cut(all_voids)
tweezer_voids = h00.faces('>Z').workplane(invert=True).rarray(
x_len / nx, y_len / ny, nx, ny, center=True).eachpoint(
lambda l: tweezer_void.val().located(l)) # tweezer voids
h03 = h02.cut(tweezer_voids)
tweezer_voids2 = h00.faces('>Z').workplane(invert=True).rarray(
x_len / nx, y_len / ny, nx, ny,
center=True).eachpoint(lambda l: tweezer_void.rotate(
(0, 0, 0), (0, 0, 1), 90).val().located(l)) # tweezer voids
h04 = h03.cut(tweezer_voids2)
return h04
def make_tower_plate(self):
towers = CQ().add(self.cu_base).toPending().extrude(self.cu_base_t)
towers = towers.faces("<Z[-2]").workplane().add(
self.cu_towers).translate(
(0, 0, self.cu_base_t)).toPending().extrude(self.cu_tower_h)
towers = towers.faces("<Z[-2]").workplane().add(
self.cu_nubs).translate(
(0, 0, self.cu_base_t)).toPending().extrude(self.cu_nub_h)
towers = towers.add(self.plate_mounts).toPending().cutThruAll()
towers = towers.add(self.cu_dowel_pf).toPending().cutThruAll()
towers = towers.translate(
(0, 0,
-self.cu_base_t - self.pcb_thickness / 2 - self.pcb_spacer_h))
return (towers)
def make_heater_plate(self):
heater = CQ().add(self.base_plate).toPending().extrude(self.heater_t)
heater = heater.faces(">Z[-1]").workplane().add(
self.plate_mounts).translate(
(0, 0, self.heater_t)).toPending().cutBlind(-self.screw_depth)
heater = heater.translate((0, 0, -self.heater_t - self.cu_base_t -
self.pcb_thickness / 2 - self.pcb_spacer_h))
return (heater)
def _make_pcb(what):
"""build the actual passthrough PCB"""
# this copies some logic in the eachpoint() function so that we can use each() which is safer
base_plane = self.plane
base = base_plane.location
if isinstance(what, (cq.Vector, cq.Shape)):
loc = base.inverse * cq.Location(base_plane, what.Center())
elif isinstance(what, cq.Sketch):
loc = base.inverse * cq.Location(base_plane, what._faces.Center())
else:
loc = what
pcb = CQ().workplane(offset=-wall_depth - board_inner_depth)
pcb = pcb.rect(board_width,
pcbt).extrude(until=board_inner_depth + wall_depth +
board_outer_depth)
pcb = pcb.edges("|Y").fillet(pcb_corner)
# put in screws with holes
hardware = cadquery.Assembly()
pcb = pcb.faces(">Y").workplane(**u.cobb).rarray(
board_width - 2 * block_width / 2, board_inner_depth +
board_outer_depth + wall_depth - 2 * pt_pcb_mount_hole_offset[0],
2, 2).clearanceHole(pcb_scr,
fit="Close",
counterSunk=False,
baseAssembly=hardware)
if hw_asy is not None:
hw_asy.add(hardware, loc=base * loc)
# put in pin0 holes
pcb = pcb.faces(">Y").workplane(**u.copo,
origin=(0, 0,
0)).pushPoints(p0pts).circle(
pin0_holed /
2).cutThruAll()
return pcb.findSolid().moved(base * loc)
def mkwalls(
aso: cadquery.Assembly,
height: float,
cshift,
extents,
hps,
zbase: float,
):
"""the chamber walls"""
name = "walls"
color = cadquery.Color("GRAY55")
thickness = 12
inner = (extents[0] - 2 * thickness, extents[1] - 2 * thickness)
inner_shift = cshift
outer_fillet = 2
inner_fillet = 6
chamfer = 0.75
nut = HexNut(size="M5-0.8", fastener_type="iso4033") # HNN-M5-A2
flat_to_flat = math.sin(60 * math.pi / 180) * nut.nut_diameter + 0.25
gas_fitting_hole_diameter = 20.6375 # 13/16"
gas_fitting_recess = 6.35
gas_fitting_flat_to_flat = 22.22 + 0.28
gas_fitting_diameter = 25.66 + 0.34
back_holes_shift = 45
back_holes_spacing = 27
front_holes_spacing = 75
fitting_step_xy = (
3, 15) # dims of the little step for the vac fitting alignment
fitting_step_center = (-fitting_step_xy[0] / 2 + inner[0] / 2 +
cshift[0], extents[1] / 2 -
fitting_step_xy[1] / 2 - thickness)
wp = CQ().workplane(offset=zbase).sketch()
wp = wp.push([cshift
]).rect(extents[0], extents[1],
mode="a").reset().vertices().fillet(outer_fillet)
wp = wp.push([inner_shift]).rect(inner[0], inner[1], mode="s").reset()
dummy_xy = (fitting_step_xy[0], inner[1])
dummy_center = (fitting_step_center[0], 0)
wp = wp.push([dummy_center]).rect(
*dummy_xy,
mode="a") # add on a dummy bit that we'll mostly subtract away
wp = wp.finalize().extrude(height).edges("|Z").fillet(inner_fillet)
sub_xy = (40, inner[1] - fitting_step_xy[1])
sub_center = (-sub_xy[0] / 2 + inner[0] / 2 + cshift[0],
-fitting_step_xy[1] / 2)
wp2 = CQ().workplane(offset=zbase).sketch().push([sub_center
]).rect(*sub_xy,
mode="a")
wp2 = wp2.finalize().extrude(height).edges("|Z").fillet(inner_fillet)
wp = wp.cut(wp2)
# wp = CQ().workplane(offset=zbase).sketch()
# wp = wp.push([cshift]).rect(extents[0], extents[1], mode="a").reset().vertices().fillet(outer_fillet)
# wp = wp.push([inner_shift]).rect(inner[0], inner[1], mode="s") # .reset().vertices().fillet(inner_fillet)
# wp = wp.finalize().extrude(height)
wp: cadquery.Workplane # shouldn't have to do this (needed for type hints)
wall_hardware = cq.Assembly(None, name="wall_hardware")
# corner holes (with nuts and nut pockets)
wp = wp.faces(">Z").workplane(
**u.copo, offset=-nut.nut_thickness).pushPoints(hps).clearanceHole(
fastener=nut,
fit="Close",
counterSunk=False,
baseAssembly=wall_hardware)
wp = wp.faces(">Z").workplane(**u.copo).sketch().push(hps[0:4:3]).rect(
flat_to_flat, nut.nut_diameter, angle=45).reset().push(
hps[1:3]).rect(flat_to_flat, nut.nut_diameter,
angle=-45).reset().vertices().fillet(
nut.nut_diameter /
4).finalize().cutBlind(-nut.nut_thickness)
# chamfers
wp = wp.faces(">Z").edges(">>X").chamfer(chamfer)
# gas holes with recesses
wp = wp.faces("<X").workplane(**u.cobb).center(
back_holes_shift,
0).rarray(back_holes_spacing, 1, 2,
1).hole(diameter=gas_fitting_hole_diameter,
depth=thickness)
# wp = wp.faces("<X").workplane(**u.cobb).center(back_holes_shift, 0).sketch().rarray(back_holes_spacing, 1, 2, 1).rect(gas_fitting_diameter, gas_fitting_flat_to_flat).reset().vertices().fillet(gas_fitting_diameter / 4).finalize().cutBlind(-gas_fitting_recess)
wp = wp.faces("<X").workplane(**u.cobb).center(
back_holes_shift, 0).sketch().rect(
2 * gas_fitting_diameter / 2 + back_holes_spacing,
gas_fitting_flat_to_flat).reset().vertices().fillet(
gas_fitting_diameter / 4).finalize().cutBlind(
-gas_fitting_recess) # unify the back holes
wp = wp.faces(">X").workplane(**u.cobb).rarray(
front_holes_spacing, 1, 2,
1).hole(diameter=gas_fitting_hole_diameter, depth=thickness)
wp = wp.faces(">X").workplane(**u.cobb).sketch().rarray(
front_holes_spacing, 1, 2,
1).rect(gas_fitting_diameter,
gas_fitting_flat_to_flat).reset().vertices().fillet(
gas_fitting_diameter /
4).finalize().cutBlind(-gas_fitting_recess)
# that's part number polymax 230X2N70
o_ring_thickness = 2
o_ring_inner_diameter = 230
ooffset = 17 # two times the o-ring path's center offset from the outer edge of the walls
# cut the lid o-ring groove
wp = wp.faces(">Z").workplane(**u.cobb).mk_groove(
ring_cs=o_ring_thickness,
follow_pending_wires=False,
ring_id=o_ring_inner_diameter,
gland_x=extents[0] - ooffset,
gland_y=extents[1] - ooffset,
hardware=wall_hardware)
# cut the base o-ring groove
wp = wp.faces("<Z").workplane(**u.cobb).mk_groove(
ring_cs=o_ring_thickness,
follow_pending_wires=False,
ring_id=o_ring_inner_diameter,
gland_x=extents[0] - ooffset,
gland_y=extents[1] - ooffset,
hardware=wall_hardware)
# get pipe fitting geometry
a_pipe_fitting = u.import_step(
wrk_dir.joinpath(
"components",
"5483T93_Miniature Nickel-Plated Brass Pipe Fitting.step"))
a_pipe_fitting = a_pipe_fitting.translate(
(0, 0, -6.35 - gas_fitting_recess))
pipe_fitting_asy = cadquery.Assembly(a_pipe_fitting.rotate(
axisStartPoint=(0, 0, 0), axisEndPoint=(0, 0, 1), angleDegrees=30),
name="one_pipe_fitting")
# move the pipe fittings to their wall holes
wppf = wp.faces(">X").workplane(**u.cobb).center(
front_holes_spacing / 2, 0)
pipe_fitting_asy.loc = wppf.plane.location
wall_hardware.add(pipe_fitting_asy, name="front_right_gas_fitting")
wppf = wppf.center(-front_holes_spacing, 0)
pipe_fitting_asy.loc = wppf.plane.location
wall_hardware.add(pipe_fitting_asy, name="front_left_gas_fitting")
wppf = wp.faces("<X").workplane(**u.cobb).center(
back_holes_shift + back_holes_spacing / 2, 0)
pipe_fitting_asy.loc = wppf.plane.location
wall_hardware.add(pipe_fitting_asy, name="rear_left_gas_fitting")
wppf = wppf.center(-back_holes_spacing, 0)
pipe_fitting_asy.loc = wppf.plane.location
wall_hardware.add(pipe_fitting_asy, name="rear_right_gas_fitting")
# get bonded washer geometry, part 229-6277
bonded_washer = u.import_step(
wrk_dir.joinpath("components", "hutchinson_ljf_207242.stp"))
bonded_washer = bonded_washer.rotate(axisStartPoint=(0, 0, 0),
axisEndPoint=(0, 1, 0),
angleDegrees=90).translate(
(0, 0, 1.25))
bonded_washer_asy = cadquery.Assembly(bonded_washer,
name="one_bonded_washer")
# move bonded washers to their wall holes
washer_thickness = 2.5
wpbw = wp.faces(">X").workplane(**u.cobb,
offset=-thickness -
washer_thickness).center(
-front_holes_spacing / 2, 0)
bonded_washer_asy.loc = wpbw.plane.location
wall_hardware.add(bonded_washer_asy, name="front_right_bonded_washer")
wpbw = wpbw.center(front_holes_spacing, 0)
bonded_washer_asy.loc = wpbw.plane.location
wall_hardware.add(bonded_washer_asy, name="front_left_bonded_washer")
wpbw = wp.faces("<X[-5]").workplane(**u.cobb).center(
-back_holes_shift - back_holes_spacing / 2, 0)
bonded_washer_asy.loc = wpbw.plane.location
wall_hardware.add(bonded_washer_asy, name="rear_right_bonded_washer")
wpbw = wpbw.center(back_holes_spacing, 0)
bonded_washer_asy.loc = wpbw.plane.location
wall_hardware.add(bonded_washer_asy, name="rear_left_bonded_washer")
aso.add(wall_hardware.toCompound(),
name="wall_hardware",
color=cadquery.Color(hardware_color))
# passthrough details
pcb_scr_head_d_safe = 6
n_header_pins = 50
header_length = n_header_pins / 2 * 2.54 + 7.62 # n*0.1 + 0.3 inches
support_block_width = 7
pt_pcb_width = 2 * (support_block_width / 2 +
pcb_scr_head_d_safe / 2) + header_length
pt_pcb_outer_depth = 8.89 + 0.381 # 0.35 + 0.15 inches
pt_pcb_inner_depth = 8.89 + 0.381 # 0.35 + 0.15 inches
pt_center_offset = 28.65 # so that the internal passthrough connector aligns with the one in the chamber
# make the electrical passthrough
pt_asy = cadquery.Assembly(
) # this will hold the passthrough part that gets created
# pcb_asy = cadquery.Assembly() # this will hold the pcb part that gets created
pcb_asy = None # dont generate the base PCB (will probably later import the detailed board model)
hw_asy = cadquery.Assembly(
) # this will hold the pcb part that gets created
ptt = 5.5 # passthrough thickness, reduce a bit from default (which was half wall thickness) to prevent some thin walls close to an o-ring gland
wp = wp.faces("<X").workplane(**u.cobb).center(
-pt_center_offset,
0).make_oringer(board_width=pt_pcb_width,
board_inner_depth=pt_pcb_inner_depth,
board_outer_depth=pt_pcb_outer_depth,
wall_depth=thickness,
part_thickness=ptt,
pt_asy=pt_asy,
pcb_asy=pcb_asy,
hw_asy=hw_asy)
# insert passthrough into assembly
for asyo in pt_asy.traverse():
part = asyo[1]
if isinstance(part.obj, cadquery.occ_impl.shapes.Solid):
aso.add(part.obj, name=asyo[0], color=color)
if pcb_asy is not None:
# insert pcb into assembly
for asyo in pcb_asy.traverse(): # insert only one solid object
part = asyo[1]
if isinstance(part.obj, cadquery.occ_impl.shapes.Solid):
aso.add(part.obj,
name=asyo[0],
color=cadquery.Color("DARKGREEN"))
# insert hardware into assembly
aso.add(hw_asy.toCompound(), name="passthrough hardware")
# add in little detailed PCB
a_little_pcb = u.import_step(
wrk_dir.joinpath("components", "pt_pcb.step")).translate(
(0, 0, -pcb_thickness / 2)) # shift pcb to be z-centered
little_pcb = cadquery.Assembly(a_little_pcb.rotate(
axisStartPoint=(0, 0, 0), axisEndPoint=(0, 1, 0),
angleDegrees=90).rotate(axisStartPoint=(0, 0, 0),
axisEndPoint=(0, 0, 1),
angleDegrees=90),
name="small detailed pcb")
asys["squirrel"].add(little_pcb,
loc=wp.plane.location,
name="little pcb")
# for the vac chuck fittings
rotation_angle = -155 # degrees
vac_fitting_wall_offset = extents[
1] / 2 - thickness - inner_fillet - 4 # mounting location offset from center
wp = wp.faces(">X").workplane(**u.cobb).center(
vac_fitting_wall_offset,
0).tapHole(vac_fitting_screw, depth=thickness + fitting_step_xy[0])
vac_chuck_fitting = cadquery.Assembly(a_vac_fitting.rotate(
axisStartPoint=(0, 0, 0),
axisEndPoint=(0, 0, 1),
angleDegrees=rotation_angle),
name="outer_wall_vac_fitting")
aso.add(vac_chuck_fitting,
loc=wp.plane.location,
name="vac chuck fitting (wall outer)")
nwp = wp.faces(">X").workplane(**u.cobb,
invert=True,
offset=thickness +
fitting_step_xy[0]).center(
vac_fitting_wall_offset, 0)
vac_chuck_fitting = cadquery.Assembly(a_vac_fitting.rotate(
axisStartPoint=(0, 0, 0),
axisEndPoint=(0, 0, 1),
angleDegrees=-rotation_angle),
name="inner_wall_vac_fitting")
aso.add(vac_chuck_fitting,
loc=nwp.plane.location,
name="vac chuck fitting (wall inner)")
aso.add(wp, name=name, color=color) # add the walls bulk
def mkbase(
aso: cadquery.Assembly,
thickness: float,
cshift,
extents,
hps,
screw: SocketHeadCapScrew,
pedistal_height: float,
zbase: float,
subs_boost: float,
):
"""the thermal base"""
plate_name = "thermal_plate"
vac_name = "vacuum_chuck"
color = cadquery.Color("GOLD")
fillet_outer = 2
fillet_inner = 10
chamfer = 1
corner_screw_depth = 4.5
pedistal_xy = (161, 152)
pedistal_fillet = 10
dowelpts = [(-73, -66), (73, 66)]
dowel_nominal_d = 3 # marked on drawing for pressfit with ⌀3K7
# vac chuck clamp screws
vacscrew_length = 20
vacscrew = CounterSunkScrew(size="M6-1",
fastener_type="iso14581",
length=vacscrew_length,
simple=no_threads) # SHK-M6-20-V2-A4
vacclamppts = [(-73, -54.75), (-73, 54.75), (73, -54.75), (73, 54.75)]
# slot plate clamp screws
spscrew_length = 8
spscrew = CounterSunkScrew(size="M3-0.5",
fastener_type="iso14581",
length=spscrew_length,
simple=no_threads) # SHK-M3-8-V2-A4
# setscrew clamping stuff
setscrew_len = 30
screw_well_depth = 3
setscrew_recess = pedistal_height + screw_well_depth
setscrew = SetScrew(size="M6-1",
fastener_type="iso4026",
length=setscrew_len,
simple=no_threads) # SSU-M6-30-A2
setscrewpts = [(-73, -43.5), (73, 43.5)]
# waterblock nuts and holes
wb_w = 177.8
wb_mount_offset_from_edge = 7.25
wb_mount_offset = wb_w / 2 - wb_mount_offset_from_edge
waterblock_mount_nut = HexNutWithFlange(
size="M6-1", fastener_type="din1665",
simple=no_threads) # HFFN-M6-A2
wb_mount_points = [
(120, wb_mount_offset),
(120, -wb_mount_offset),
(-129, wb_mount_offset),
(-129, -wb_mount_offset),
]
# make the base chunk
wp = CQ().workplane(**u.copo, offset=zbase).sketch()
wp = wp.push([cshift]).rect(extents[0], extents[1], mode="a")
wp = wp.finalize().extrude(thickness)
wp: cadquery.Workplane # shouldn't have to do this (needed for type hints)
# cut for waterblock mnt ears
ear_square = 2 * wb_mount_offset
wp = wp.faces("<X").workplane(**u.cobb).rect(
xLen=extents[1] - 2 * ear_square, yLen=thickness,
centered=True).cutBlind(-(extents[0] - wall_outer[0]) / 2)
wp = wp.faces(">X").workplane(**u.cobb).rect(
xLen=extents[1] - 2 * ear_square, yLen=thickness,
centered=True).cutBlind(-(extents[0] - wall_outer[0]) / 2)
wp = wp.edges("|Z exc (<<X or >>X)").fillet(fillet_inner)
wp = wp.edges("|Z and (<<X or >>X)").fillet(fillet_outer)
# pedistal
wp = wp.faces(">Z").workplane(**u.copo, origin=(
0, 0, 0)).sketch().rect(
*pedistal_xy).reset().vertices().fillet(pedistal_fillet)
wp = wp.finalize().extrude(pedistal_height)
hardware = cq.Assembly(None) # a place to keep the harware
# corner screws
wp = wp.faces("<Z").workplane(**u.copo,
offset=-corner_screw_depth).pushPoints(
hps).clearanceHole(
fastener=screw,
fit="Close",
baseAssembly=hardware)
wp = wp.faces("<Z[-2]").wires().toPending().extrude(
corner_screw_depth,
combine="cut") # make sure the recessed screw is not buried
# dowel holes
wp = wp.faces(">Z").workplane(**u.copo).pushPoints(dowelpts).hole(
dowel_nominal_d + dowel3_delta_press, depth=pedistal_height)
# waterblock mounting
wp = wp.faces(">Z[-2]").workplane(
**u.copo).pushPoints(wb_mount_points).clearanceHole(
fastener=waterblock_mount_nut,
counterSunk=False,
fit="Loose",
baseAssembly=hardware)
# vac chuck stuff
# split
wp = wp.faces(">Z[-2]").workplane(**u.copo).split(
keepTop=True, keepBottom=True).clean()
btm_piece = wp.solids("<Z").first().edges("not %CIRCLE").chamfer(
chamfer)
top_piece = wp.solids(">Z").first().edges("not %CIRCLE").chamfer(
chamfer)
# hole array
n_array_x = 4
n_array_y = 5
x_spacing = 35
y_spacing = 29
x_start = (n_array_x - 1) / 2
y_start = (n_array_y - 1) / 2
n_sub_array_x = 8
n_sub_array_y = 2
x_spacing_sub = 3
y_spacing_sub = 10
x_start_sub = (n_sub_array_x - 1) / 2
y_start_sub = (n_sub_array_y - 1) / 2
hole_d = 1
hole_cskd = 1.1
csk_ang = 45
# compute all the vac chuck vent hole points
vac_hole_pts = [] # where the vac holes are drilled
street_centers = [] # the distribution street y values
for i in range(n_array_x):
for j in range(n_array_y):
for k in range(n_sub_array_x):
for l in range(n_sub_array_y):
ctrx = (i - x_start) * x_spacing
ctry = (j - y_start) * y_spacing
offx = (k - x_start_sub) * x_spacing_sub
offy = (l - y_start_sub) * y_spacing_sub
vac_hole_pts.append((ctrx + offx, ctry + offy))
street_centers.append((0, ctry + offy))
street_centers = list(set(street_centers)) # prune duplicates
# boost substrates up so they can't slip under
raise_square = (25, 25)
raise_fillet = 1
top_piece = CQ(top_piece.findSolid()).faces(">Z").workplane(
**u.copo).sketch().rarray(
x_spacing, y_spacing, n_array_x,
n_array_y).rect(*raise_square).reset().vertices().fillet(
raise_fillet).finalize().extrude(subs_boost)
# drill all the vac holes
top_piece = top_piece.faces(">Z").workplane(
**u.copo).pushPoints(vac_hole_pts).cskHole(diameter=hole_d,
cskDiameter=hole_cskd,
cskAngle=csk_ang)
# clamping setscrew threaded holes
top_piece = top_piece.faces(">Z").workplane().pushPoints(
setscrewpts).tapHole(
setscrew, depth=setscrew_recess, baseAssembly=hardware
) # bug prevents this from working correctly, workaround below
# clamping setscrew downbumps in the thermal plate
btm_piece = CQ(btm_piece.findSolid()).faces(">Z").workplane(
**u.copo).pushPoints(setscrewpts).circle(
vacscrew.clearance_hole_diameters["Close"] /
2).cutBlind(-screw_well_depth)
# vac chuck clamping screws
top_piece = top_piece.faces(">Z[-2]").workplane(
**u.copo, origin=(0, 0, 0)).pushPoints(vacclamppts).clearanceHole(
vacscrew, fit="Close", baseAssembly=hardware)
# next line is a hack to make absolutely sure the screws are recessed
top_piece = top_piece.faces(">Z[-2]").workplane(
**u.copo, origin=(0, 0, 0)).pushPoints(vacclamppts).cskHole(
vacscrew.clearance_hole_diameters["Close"],
cskDiameter=vacscrew.head_diameter + 1,
cskAngle=vacscrew.screw_data["a"])
btm_piece = btm_piece.faces(">Z").workplane(**u.copo, origin=(
0, 0, 0)).pushPoints(vacclamppts).tapHole(
setscrew, depth=vacscrew_length - pedistal_height +
1) # threaded holes to attach to
# mod the slot plate to include csk screws for clamping
for name, part in asys["squirrel"].traverse():
if name == "slot_plate":
sp_clamp_pts = [(p[0], p[1] + 5) for p in vacclamppts]
sp = part.obj
vch_shift_y = -37
vch_shift_x = 3
sp = sp.faces(">Z").workplane(**u.copo, origin=(
0, 0, 0)).rarray(vacclamppts[3][0] * 2 + vch_shift_x,
vacclamppts[3][1] * 2 + vch_shift_y, 2,
2).clearanceHole(spscrew,
fit="Close",
baseAssembly=hardware)
# next line is a hack to make absolutely sure the screws are recessed
sp = sp.faces(">Z").workplane(**u.copo, origin=(
0, 0, 0)).rarray(
vacclamppts[3][0] * 2 + vch_shift_x,
vacclamppts[3][1] * 2 + vch_shift_y, 2,
2).cskHole(spscrew.clearance_hole_diameters["Close"],
cskDiameter=spscrew.head_diameter + 1,
cskAngle=spscrew.screw_data["a"])
part.obj = sp
# make threaded holes to attach to, TODO: mark these as M3x0.5 threaded holes in engineering drawing
top_piece = top_piece.faces(">Z[-2]").workplane(
**u.copo,
origin=(0, 0,
0)).rarray(vacclamppts[3][0] * 2 + vch_shift_x,
vacclamppts[3][1] * 2 + vch_shift_y, 2,
2).tapHole(spscrew,
depth=spscrew_length - 1,
counterSunk=False)
# compute the hole array extents for o-ring path finding
sub_x_length = (n_sub_array_x - 1) * x_spacing_sub + hole_d
array_x_length = (n_array_x - 1) * x_spacing + sub_x_length
sub_y_length = (n_sub_array_y - 1) * y_spacing_sub + hole_d
array_y_length = (n_array_y - 1) * y_spacing + sub_y_length
# for the vac chuck fitting
vac_fitting_chuck_offset = -0.5 * y_spacing
fitting_tap_depth = 20
top_piece = top_piece.faces(">X").workplane(**u.cobb).center(
vac_fitting_chuck_offset, 0).tapHole(vac_fitting_screw,
depth=fitting_tap_depth)
vac_chuck_fitting = cadquery.Assembly(a_vac_fitting.rotate(
axisStartPoint=(0, 0, 0), axisEndPoint=(0, 0, 1), angleDegrees=-5),
name="chuck_vac_fitting")
hardware.add(vac_chuck_fitting,
loc=top_piece.plane.location,
name="vac chuck fitting")
# handle the valve, part number 435-8101
a_valve = u.import_step(
wrk_dir.joinpath("components", "VHK2-04F-04F.step"))
# a_valve = a_valve.rotate(axisStartPoint=(0, 0, 0), axisEndPoint=(0, 1, 0), angleDegrees=90).translate((0, 7.5, 9))
a_valve = a_valve.translate((0, 7.5, 9))
valve_mnt_spacing = 16.5
valve_mnt_screw_length = 30
valve_body_width = 18
valve_mnt_hole_depth = 15
valve_mnt_screw = PanHeadScrew(
size="M4-0.7",
fastener_type="iso14583",
length=valve_mnt_screw_length) # SHP-M4-30-V2-A4
btm_piece = btm_piece.faces(">X[-2]").workplane(**u.cobb).rarray(
valve_mnt_spacing, 1, 2,
1).tapHole(valve_mnt_screw,
depth=valve_mnt_hole_depth,
counterSunk=False) # cut threaded holes
btm_piece = btm_piece.faces(">X[-2]").workplane(**u.cobb).rarray(
valve_mnt_spacing, 1, 2,
1).tapHole(valve_mnt_screw,
depth=valve_mnt_screw_length - valve_body_width,
counterSunk=False,
baseAssembly=aso) # add screws
aso.add(a_valve, loc=btm_piece.plane.location, name="valve")
# handle the elbow, part number 306-5993
an_elbow = u.import_step(
wrk_dir.joinpath("components", "3182_04_00.step"))
an_elbow = an_elbow.rotate(axisStartPoint=(0, 0, 0),
axisEndPoint=(0, 1, 0),
angleDegrees=-90).rotate(
axisStartPoint=(0, 0, 0),
axisEndPoint=(0, 0, 1),
angleDegrees=90) # rotate the elbow
btm_pln = btm_piece.faces(">X[-2]").workplane(
**u.cobb,
offset=valve_body_width / 2).center(-26.65,
7.5) # position the elbow
aso.add(an_elbow, loc=btm_pln.plane.location, name="elbow")
# vac distribution network
zdrill_loc = (pedistal_xy[0] / 2 - fitting_tap_depth, 0.5 * y_spacing)
zdrill_r = 3
zdrill_depth = -pedistal_height / 2 - 2.5
top_piece = top_piece.faces("<Z").workplane(**u.cobb).pushPoints(
[zdrill_loc]).circle(zdrill_r).cutBlind(zdrill_depth)
highway_depth = 3
highway_width = 6
street_depth = 2
street_width = 1
top_piece = top_piece.faces("<Z").workplane(**u.cobb).sketch().push([
(zdrill_loc[0] / 2, zdrill_loc[1])
]).slot(w=zdrill_loc[0],
h=highway_width).finalize().cutBlind(-highway_depth)
top_piece = top_piece.faces("<Z").workplane(**u.cobb).sketch().slot(
w=pedistal_xy[0] - 2 * fitting_tap_depth,
h=highway_width,
angle=90).finalize().cutBlind(-highway_depth) # cut center highway
top_piece = top_piece.faces("<Z").workplane(
**u.cobb).sketch().push(street_centers).slot(
w=array_x_length - hole_d, h=street_width).finalize().cutBlind(
-street_depth) # cut streets
# padding to keep the oring groove from bothering the vac holes
groove_x_pad = 8
groove_y_pad = 16
# that's part number 196-4941
o_ring_thickness = 2
o_ring_inner_diameter = 170
# cut the o-ring groove
top_piece = top_piece.faces("<Z").workplane(**u.cobb).mk_groove(
ring_cs=o_ring_thickness,
follow_pending_wires=False,
ring_id=o_ring_inner_diameter,
gland_x=array_x_length + groove_x_pad,
gland_y=array_y_length + groove_y_pad,
hardware=hardware)
# cut the electrical contact screw mount holes
vc_e_screw_spacing = 15
vc_e_screw_center_offset = 10
vc_e_screw_hole_depth = 12
vc_e_screw_screw_length = 8
vc_e_srew_type = "M3-0.5"
e_dummy = SetScrew(vc_e_srew_type,
fastener_type="iso4026",
length=vc_e_screw_screw_length,
simple=no_threads)
# mark these chuck electrical connection screw holes in engineering drawing as M3x0.5
top_piece = top_piece.faces("<X").workplane(**u.cobb).center(
vc_e_screw_center_offset,
0).rarray(vc_e_screw_spacing, 1, 2,
1).tapHole(e_dummy, depth=vc_e_screw_hole_depth)
aso.add(btm_piece, name=plate_name, color=color)
aso.add(top_piece, name=vac_name, color=color)
aso.add(hardware.toCompound(),
name="hardware",
color=cadquery.Color(hardware_color))
def build(self, stacks_to_build: List[str] = [""]):
if stacks_to_build == [""]: # build them all by default
stacks_to_build = [x["name"] for x in self.stacks]
drawing_layers_needed = []
for stack_instructions in self.stacks:
if stack_instructions["name"] in stacks_to_build:
for stack_layer in stack_instructions["layers"]:
drawing_layers_needed += stack_layer["drawing_layer_names"]
if "edge_case" in stack_layer:
drawing_layers_needed.append(stack_layer["edge_case"])
drawing_layers_needed_unique = list(set(drawing_layers_needed))
# all the wires we'll need here
wires = self.get_wires(self.sources, drawing_layers_needed_unique)
stacks = {}
for stack_instructions in self.stacks:
# asy = cadquery.Assembly()
asy = None
if stack_instructions["name"] in stacks_to_build:
# asy.name = stack_instructions["name"]
z_base = 0
for stack_layer in stack_instructions["layers"]:
t = stack_layer["thickness"]
boundary_layer_name = stack_layer["drawing_layer_names"][
0] # boundary layer must always be the first one listed
w0 = wires[boundary_layer_name][0]
wp = CQ().sketch().face(w0)
for w in wires[boundary_layer_name][1::]:
wp = wp.face(w, mode="s")
wp = wp.finalize().extrude(t) # the workpiece is now made
wp = wp.faces(">Z").sketch()
if "array" in stack_layer:
array_points = stack_layer["array"]
else:
array_points = [(0, 0, 0)]
for drawing_layer_name in stack_layer[
"drawing_layer_names"][1:]:
some_wires = wires[drawing_layer_name]
for awire in some_wires:
wp = wp.push(array_points).face(
awire, mode="a", ignore_selection=False)
wp = wp.faces()
if "edge_case" in stack_layer:
edge_wire = wires[stack_layer["edge_case"]][0]
wp = wp.face(edge_wire, mode="i")
wp = wp.clean()
# wp = wp.finalize().cutThruAll() # this is a fail, but should work
wp = wp.finalize().extrude(-t, combine="cut")
new = wp.translate([0, 0, z_base])
if asy is None: # some silly hack needed to work around https://github.com/CadQuery/cadquery/issues/993
asy = cadquery.Assembly(new,
name=stack_layer["name"],
color=cadquery.Color(
stack_layer["color"]))
# asy.name = stack_instructions["name"]
else:
asy.add(new,
name=stack_layer["name"],
color=cadquery.Color(stack_layer["color"]))
z_base = z_base + t
stacks[stack_instructions["name"]] = asy
return stacks
def _makeNegative(center):
"""
Generates the pocket shape we'll be cutting out
"""
# the connector pocket's dimensions
pocket_w = connector_width + con_clearance * 2
pocket_l = con_len + con_clearance * 2
pocket_d = connector_height + con_clearance
# find the source thing's thickness at the cut point
swiss = CQ(self.plane).add(self.findSolid())
cheese = CQ(self.plane).add(self.findSolid()).pushPoints(
[center]).circle(0.5).cutThruAll()
core = swiss.cut(cheese)
this_thikness = u.find_length(core, along="normal", bb_method=False)
min_thickness = pocket_d + min_gp_connector_pocket_spacing + gp_depth
# check that it's thick enough here
if this_thikness < min_thickness:
raise (ValueError(
f"The part is too thin (thickness = {this_thikness}) at {center} to cut the PCB pocket"
))
# make a box to subtract from
start_box = CQ("XY").box(100,
100,
this_thikness,
centered=(True, True, False))
# make a simple pocket that we'll use for the chamfer operation
result = start_box.faces("<Z").rect(pocket_w,
pocket_l).cutBlind(pocket_d)
# chamfer the connector edge
result = result.faces("<Z").edges("not(<X or >X or <Y or >Y)").chamfer(
chamfer_length)
# now make the undercut pocket
CQ.undercutRelief2D = u.undercutRelief2D
result = result.faces("<Z").workplane().undercutRelief2D(
pocket_l, pocket_w, diameter=r * 2, angle=90,
kind=kind).cutBlind(pocket_d)
# cut out the glue pocket
slot_width = c.pcb_thickness + 2 * gp_buffer
slot_len = pcb_len + slot_width
result = result.faces(">Z").workplane().slot2D(
slot_len, slot_width, angle=90).cutBlind(-gp_depth)
# cut out the pcb passthrough slot
slot_width = c.pcb_thickness + 2 * pcb_clearance
slot_len = pcb_len + slot_width
result = result.faces(">Z").workplane().slot2D(slot_len,
slot_width,
angle=90).cutThruAll()
# invert the geometry and rotate the negative
negative = start_box.cut(result)
negative = negative.rotate((0, 0, 0), (0, 0, 1), angle)
to_cut = negative.findSolid().locate(center)
to_cut = to_cut.mirror("XY")
return to_cut
def _make_pt(what):
"""build a passthrough component"""
# this copies some logic in the eachpoint() function so that we can use each() which is safer
base_plane = self.plane
base = base_plane.location
if isinstance(what, (cq.Vector, cq.Shape)):
loc = base.inverse * cq.Location(base_plane, what.Center())
elif isinstance(what, cq.Sketch):
loc = base.inverse * cq.Location(base_plane, what._faces.Center())
else:
loc = what
hardware = cadquery.Assembly()
passthrough = CQ().add(passthrough_face)
passthrough = passthrough.wires().toPending().extrude(
-part_thickness) # extrude the bulk
slotd = pcbt + 2 * min_gap
passthrough = passthrough.workplane(
centerOption="ProjectedOrigin").slot2D(
length=board_width + slotd / 2, diameter=slotd,
angle=0).cutThruAll() # cut the pcb slot
# TODO: retool some geometry because this cutout could possibly interfere with the oring gland for thick PCBs
# cut the oring groove
cq.Workplane.mk_groove = groovy.mk_groove
oring_path = o_face.outerWire().translate((0, 0, -part_thickness))
passthrough = passthrough.faces("<<Z").workplane(
**u.copo).add(oring_path).toPending().mk_groove(ring_cs=oring_cs,
hardware=hardware)
# cut the fastening screw holes
passthrough = passthrough.faces(">Z").workplane(
**u.copo,
origin=(0, 0,
0)).pushPoints(fhps).clearanceHole(fix_scr,
fit="Close",
baseAssembly=hardware)
# add the support towers
in_post_length = wall_depth + board_inner_depth
passthrough = passthrough.faces(">Z").workplane(
**u.copo, origin=(0, 0, 0)).sketch().push(sbpts).rect(
*support_block).finalize().extrude(-in_post_length)
passthrough = passthrough.faces(">Z").workplane(
**u.copo, origin=(0, 0, 0)).sketch().push(sbpts).rect(
*support_block).finalize().extrude(board_outer_depth)
# mount holes
pcb_center_z = ((board_outer_depth) -
(wall_depth + board_inner_depth)) / 2
passthrough = passthrough.faces("+Y").faces(">>Z").workplane(
**u.copo, origin=(0, 0, pcb_center_z)).rarray(
board_width - 2 * pt_pcb_mount_hole_offset[1],
board_inner_depth + board_outer_depth + wall_depth -
2 * pt_pcb_mount_hole_offset[0], 2,
2).clearanceHole(pcb_scr, fit="Close", counterSunk=False)
passthrough = passthrough.edges("<<Z or >>Z").edges("|Y").fillet(
pcb_corner)
passthrough = passthrough.edges(
"<<Z[-1] or <<Z[-2] or <<Z[-3] or >>Z[-1] or >>Z[-2] or >>Z[-3]"
).chamfer(0.5)
if hw_asy is not None:
hw_asy.add(hardware, loc=base * loc)
return passthrough.findSolid().moved(base * loc)
def build(self, stacks_to_build: List[str] = [""]):
if stacks_to_build == [""]: # build them all by default
stacks_to_build = [x["name"] for x in self.stacks]
drawing_layers_needed = []
for stack_instructions in self.stacks:
if stack_instructions["name"] in stacks_to_build:
for stack_layer in stack_instructions["layers"]:
drawing_layers_needed += stack_layer["drawing_layer_names"]
if "edge_case" in stack_layer:
drawing_layers_needed.append(stack_layer["edge_case"])
drawing_layers_needed_unique = list(set(drawing_layers_needed))
# all the faces we'll need here
layers = self.get_layers(self.sources, drawing_layers_needed_unique)
self._layers = layers
stacks = {}
for stack_instructions in self.stacks:
asy = cadquery.Assembly()
# asy = None
if stack_instructions["name"] in stacks_to_build:
asy.name = stack_instructions["name"]
z_base = 0
for stack_layer in stack_instructions["layers"]:
t = stack_layer["thickness"]
boundary_layer_name = stack_layer["drawing_layer_names"][
0] # boundary layer must always be the first one listed
layer_comp = cadquery.Compound.makeCompound(
layers[boundary_layer_name].faces().vals())
if "array" in stack_layer:
array_points = stack_layer["array"]
else:
array_points = [(0, 0, 0)]
if len(stack_layer["drawing_layer_names"]) == 1:
wp = CQ().sketch().push(array_points).face(
layer_comp, mode="a", ignore_selection=False)
else:
wp = CQ().sketch().face(layer_comp,
mode="a",
ignore_selection=False)
wp = wp.finalize().extrude(
t) # the workpiece base is now made
if len(stack_layer["drawing_layer_names"]) > 1:
wp = wp.faces(">Z").workplane(
centerOption="ProjectedOrigin").sketch()
for drawing_layer_name in stack_layer[
"drawing_layer_names"][1:]:
layer_comp = cadquery.Compound.makeCompound(
layers[drawing_layer_name].faces().vals())
wp = wp.push(array_points).face(
layer_comp, mode="a", ignore_selection=False)
wp = wp.faces()
if "edge_case" in stack_layer:
edge_layer_name = stack_layer["edge_case"]
layer_comp = cadquery.Compound.makeCompound(
layers[edge_layer_name].faces().vals())
es = CQ().sketch().face(layer_comp)
wp = wp.face(es.faces(), mode="i")
wp = wp.clean()
# wp = wp.finalize().cutThruAll() # this is a fail, but should work. if it's not a fail is slower than the below line
wp = wp.finalize().extrude(-t, combine="cut")
# give option to override calculated z_base
if "z_base" in stack_layer:
z_base = stack_layer["z_base"]
new = wp.translate([0, 0, z_base])
asy.add(new,
name=stack_layer["name"],
color=cadquery.Color(stack_layer["color"]))
z_base = z_base + t
stacks[stack_instructions["name"]] = asy
return stacks