Корпус для платы 70×50 мм: скрипт CadQuery (model.py)

import cadquery as cq
import cadkit as ck

# Parameters
PCB_L, PCB_W = 70.0, 50.0              # PCB dimensions
OUTER_L, OUTER_W, OUTER_H = 80.0, 60.0, 30.0  # Outer box dimensions
WALL_T = 2.0                          # Wall and bottom thickness
STANDEE_H = 4.0                       # Height of the PCB standoffs
STANDEE_D = 6.0                       # Diameter of the standoff base
SCREW_D = 3.0                         # M3 screw diameter
CONNECTOR_D = 12.0                    # Diameter of the connector hole

# 1. Main Box Body
# Create a solid block and shell it to get the walls and bottom
box = (
    cq.Workplane("XY")
    .box(OUTER_L, OUTER_W, OUTER_H, centered=(True, True, False))
    .faces(">Z").shell(-WALL_T)
)

# 2. Standoffs for PCB
# Position standoffs at the corners of the PCB
standoff_pts = [
    (35, 25), (-35, 25), (-35, -25), (35, -25)
]

# Create standoffs as a separate solid to avoid stack errors
standoffs = (
    cq.Workplane("XY")
    .workplane(offset=WALL_T)
    .pushPoints(standoff_pts)
    .circle(STANDEE_D / 2)
    .extrude(STANDEE_H)
)

# 3. Screw Holes
# Create holes as a separate solid to subtract
hole_d = ck.clearance(3) 
holes_solid = (
    cq.Workplane("XY")
    .workplane(offset=WALL_T)
    .pushPoints(standoff_pts)
    .circle(hole_d / 2)
    .extrude(STANDEE_H + 1.0) # Ensure it cuts through the standoff
)

# 4. Connector Hole
# Create a cylinder to cut the hole in the front wall (Y = -OUTER_W/2)
connector_hole_solid = (
    cq.Workplane("XZ")
    .center(0, OUTER_H / 2)
    .circle(CONNECTOR_D / 2)
    .extrude(OUTER_W)
    .translate((0, -OUTER_W/2, 0))
)

# Combine all parts using boolean operations
# Start with box, add standoffs, then subtract holes and connector
housing = box.union(standoffs).cut(holes_solid).cut(connector_hole_solid)

# Final touches: Fillets and Chamfers
# Use a small radius for fillets to ensure stability
housing = housing.edges("|Z").fillet(2.0)
housing = housing.edges(">Z").chamfer(1.0)

# Assembly
assy = cq.Assembly()
assy.add(housing, name="enclosure", color=cq.Color(0.2, 0.6, 0.2))

# Optional: Add a dummy PCB to visualize fit
pcb_visual = (
    cq.Workplane("XY")
    .workplane(offset=WALL_T + STANDEE_H)
    .box(PCB_L, PCB_W, 1.6, centered=(True, True, False))
)
assy.add(pcb_visual, name="pcb_dummy", color=cq.Color(0.1, 0.4, 0.1))

result = assy