Parametric Stackable Storage Tray

OpenSCAD tray with a built-in stacking foot. Set your Gridfinity footprint, partitions, and textures, then print as many as you need.

Repository: https://github.com/ToledoEM/Build_your_tray

How stacking works

Each tray has a foot skirt: a solid tab below the tray body that drops into the inner cavity of the tray below. The floor slab underside of the upper tray rests on the top rim of the lower tray when seated. A 2° draft taper on the foot outer face and a self-centering chamfer on the bottom edge keep nesting snag-free.

Footprint is set by `gf_cells_x × gf_cells_y` (each cell = 42mm). The Gridfinity base is optional, toggled per tray. When on, GF socket cavities are cut into the bottom face of the foot; when off, the foot is a plain solid tab.

Features

Stacking foot with Gridfinity option The foot fits inside the tray below with a gap controlled by `stack_tolerance`. Set `gf_base = true` and the foot bottom becomes a Gridfinity socket: the tray stacks on other trays and sits on any Gridfinity baseplate.

Partitioning Set column widths with `col_widths` (Golden Ratio default: `[1, 1.618, 1]`) and define row subdivisions per column independently via `col_rows`.

Sine Wave Fins Set any column in `col_fins` to `true` to replace row dividers with corrugated wave fins. Useful for screws, bits, or small parts. Control amplitude, period, count, height, and z-offset.

External Ribbing Optional vertical ribs on the outer walls. Adjustable width, depth, gap, and taper ratio.

Key Parameters

Gridfinity footprint

Parameter	Default	Description
`gf_cells_x`	3	Grid cells in X → width = cells × 42mm
`gf_cells_y`	3	Grid cells in Y → length = cells × 42mm
`gf_base`	true	Enable Gridfinity socket on foot bottom
`gf_magnets`	false	Add magnet pockets (6.5mm OD, 2.4mm deep)
`gf_center_screw`	false	Add center screw hole per cell

Tray body

Parameter	Default	Description
`wall_height`	40	Outer wall height (mm)
`wall_thick`	3.0	Outer wall thickness (mm)
`corner_r`	8.0	Outer corner radius (mm)
`floor_thick`	2.0	Floor slab thickness (mm)
`int_wall_height`	30	Internal wall height above floor (mm)
`int_wall_thick`	1.75	Internal wall thickness (mm)

Stacking

Parameter	Default	Description
`stack_depth`	4	Foot seating depth (mm)
`stack_tolerance`	0.30	Radial clearance per side (0.20 tight, 0.50 loose)
`foot_thick`	2	Foot wall thickness (mm)

Partitions

Parameter	Default	Description
`col_count`	3	Number of vertical columns
`col_widths`	`[1, 1.618, 1]`	Relative column widths
`col_rows`	`[2, 3, 1]`	Row subdivisions per column
`col_fins`	`[false, false, true]`	Per-column fin fill flag

Sine wave fins

Parameter	Default	Description
`fins_enable`	true	Master toggle for fin columns
`fin_orient`	`"width"`	Wave direction: `"width"` or `"length"`
`fin_wave_amp`	3.0	Wave amplitude (mm)
`fin_period`	14	Wave period (mm)
`fin_count`	4	Number of fin walls across column
`fin_height`	0	Fin height (0 = use `int_wall_height`)
`fin_z_offset`	0	Height above floor where wave trough starts

External ribs

Parameter	Default	Description
`rib_enable`	false	Toggle outer wall ribs
`rib_width`	3.00	Rib footprint along perimeter (mm)
`rib_depth`	1.50	Rib protrusion from wall face (mm)
`rib_gap`	1.50	Gap between ribs (mm)
`rib_taper`	1.00	Top/bottom width ratio

All parameters accept continuous values. Edit values directly in `tray_stack.scad`; no sliders.

Descrição