Sprout Cassette V1

implemented unverified

Vertical Farm Pack (wave A1 swap driver): the Sprout Cassette — the SECOND implementor of the Cassette Interface Standard, proving the standard is a standard: same recipe ops, same cassette_*/window_* frame keys, same removable_insert interface — the rail is untouched when this swaps in for the coco cassette. Agronomy differs: a fine 4 mm mesh for small sprout seeds, a shallow 18 mm tray (sprouts need no substrate depth), a gentler contact window (1 mm pulse reach, 14 mm — sized for the standard 16 mm channel). Substrate presets beyond mesh sizing (rockwool cubes, net pots) remain future cassettes, not parameters here.

Declaration example

A minimal product declaration for this archetype — exposed parameters at their defaults. Validate and build it with forge validate / forge build.

schema: product/v1
id: my_sprout_cassette
archetype: sprout_cassette_v1@1

params:
  cassette_l: 177mm
  cassette_w: 177mm
  cassette_h: 18mm
  mesh_cell: 4mm
  window_w: 14mm
  window_drop: 1mm

Parameters

parameter	type	default	range	role
`cassette_l`outer envelope X — shared with the rail seat	`length`	`177mm`	`160mm … 236mm`	assembly	exposed
`cassette_w`outer envelope Y — shared with the rail seat	`length`	`177mm`	`160mm … 236mm`	assembly	exposed
`cassette_h`tray height — the substrate depth budget	`length`	`18mm`	`18mm … 40mm`	functional	exposed
`wall`	`length`	`2.4mm`	`2mm … 3.2mm`	structural
`floor_t`	`length`	`2mm`	`1.6mm … 3mm`	structural
`corner_r`	`length`	`3mm`	`2mm … 6mm`	aesthetic
`mesh_cell`square mesh opening — fine enough to hold sprout seeds	`length`	`4mm`	`4mm … 8mm`	functional	exposed
`mesh_rib`web between mesh cells	`length`	`1.3mm`	`1.2mm … 1.5mm`	manufacturing
`mesh_margin`solid rim inside the walls before the mesh starts	`length`	`6mm`	`4mm … 12mm`	structural
`window_w`contact window width — must drop INSIDE the rail channel (verified in the assembled pose); contact area scales with window_l	`length`	`14mm`	`8mm … 40mm`	functional	exposed
`window_l`contact window length along the flow axis	`length`	`60mm`	`40mm … 120mm`	functional
`window_drop`how deep the window reaches into the channel's upper zone	`length`	`1mm`	`1mm … 2mm`	functional	exposed
`snap_w`	`length`	`10mm`	`8mm … 14mm`	assembly
`snap_h`	`length`	`4mm`	`3.5mm … 6mm`	assembly
`snap_top_offset`window top below the rim — positions the frame hook lips	`length`	`5.5mm`	`4mm … 12mm`	assembly
`snap_offset`Y offset of each snap window pair from the center	`length`	`60mm`	`30mm … 100mm`	assembly
`notch_w`	`length`	`18mm`	`16mm … 30mm`	functional
`notch_d`	`length`	`8mm`	`6mm … 14mm`	functional