Mealworm sieve tower
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Modular mealworm grading tower. Stack 1.0/1.8/2.5mm layers. Larvae-safe slots, gravity-fed. Parametric OpenSCAD.
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Standard mesh sieves trap mealworm larvae in the square openings — they get stuck and won't fall through. This parametric tower solves that with 45° rotating slotted holes designed specifically for Tenebrio molitor grading. Stack multiple layers to sort by size.
Features:
Three sieve presets: 1.0mm, 1.8mm, 2.5mm slot widths
45° rotated slots prevent larvae from getting stuck
Stacking rings with tolerances — no tools, no threaded joints
Gravity-fed: pour from the top, each layer retains a different fraction
Lid with 0.8mm ventilation holes + solid collection base
All parameters adjustable via OpenSCAD Customizer
What you get:
sieve.scad — parametric sieve module (customizer presets in sieve.json)
lid.scad — ventilated cover
base.scad — collection tray
assembly.scad — preview all layers stacked
Pre-exported STLs for each preset and part
Printing tips:
Sieve frames: PETG (food-safe, durable)
Lid & base: PLA is fine
No supports needed
0.4mm nozzle, 0.2mm layer height
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