76 lines
No EOL
2.8 KiB
Python
76 lines
No EOL
2.8 KiB
Python
from build123d import *
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from ocp_vscode import show
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# ==========================================
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# --- MASTER PARAMETER ---
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# Defines the outer diameter in mm.
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# Change this single value to scale the entire model!
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model_size = 35.0
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# ==========================================
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# --- Derived Parameters ---
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# All dimensions are calculated as fractions of the original 35mm baseline
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outer_diameter = model_size
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inner_diameter = model_size * (29.0 / 35.0)
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thickness = model_size * (2.0 / 35.0)
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# Pin dimensions
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pin_diameter = model_size * (2.0 / 35.0)
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pin_length = model_size * (5.0 / 35.0)
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pin_spacing = model_size * (14.0 / 35.0) # Distance from center to each pin
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# --- Lightning Bolt Proportions ---
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# W is a safe overhang width (guaranteed to be outside the ring for clean intersection)
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W = outer_diameter * 1.2
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# Vertical (Y) heights for the horizontal bars
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y_top_outer = model_size * (4.0 / 35.0)
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y_top_inner = model_size * (2.0 / 35.0)
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y_bot_outer = model_size * (-4.0 / 35.0)
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y_bot_inner = model_size * (-2.0 / 35.0)
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# Horizontal (X) positions mapping the central diagonal cut
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x_inner_left = model_size * (-2.0 / 35.0)
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x_diag_bot = model_size * (-6.0 / 35.0)
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x_inner_right = model_size * (2.0 / 35.0)
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x_diag_top = model_size * (6.0 / 35.0)
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with BuildPart() as opel_pin:
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# 1. Base Ring
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with BuildSketch() as ring_sketch:
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Circle(outer_diameter / 2)
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Circle(inner_diameter / 2, mode=Mode.SUBTRACT)
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extrude(amount=thickness)
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# 2. Lightning Bolt Profile (Fully Parametric)
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with BuildSketch() as bolt_sketch:
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# Drawing the Z-shape using our dynamic variables
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pts = [
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(-W, y_top_outer), # 1. Top-left outer edge
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(-W, y_bot_inner), # 2. Bottom-left outer edge
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(x_inner_left, y_bot_inner), # 3. Inner bottom-left corner
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(x_diag_bot, y_bot_outer), # 4. Diagonal drop to the lower bar
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(W, y_bot_outer), # 5. Bottom-right outer edge
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(W, y_top_inner), # 6. Top-right outer edge
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(x_inner_right, y_top_inner), # 7. Inner top-right corner
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(x_diag_top, y_top_outer) # 8. Diagonal rise back to the upper bar
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]
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Polygon(*pts)
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# Cleanly slice off the overhangs using the outer circle
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Circle(outer_diameter / 2, mode=Mode.INTERSECT)
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extrude(amount=thickness)
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# 3. Mounting Pins (on the back face)
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bottom_face = opel_pin.faces().sort_by(Axis.Z)[0]
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with BuildSketch(bottom_face) as pin_sketch:
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# Place pins dynamically based on the scale
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with Locations((-pin_spacing, 0), (pin_spacing, 0)):
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Circle(pin_diameter / 2)
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extrude(amount=pin_length)
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# --- Send to OCP CAD Viewer ---
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show(opel_pin) |