Lamp Bracket V1

implemented unverified

Ceiling/under-shelf lamp bracket: a screw-mounted plate, a cantilever arm with an optional root gusset, and a CONTINUOUS wiring channel — vertical entry through the plate near the root, horizontal run exiting the arm tip. The channel is verified void along its full L-path on the compiled solid. The arm tip carries the datum a lamp_socket_cup_v1 mounts onto (match the cup's mount_bc to the arm width).

Built from a real example — orbit to inspect.

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_lamp_bracket
archetype: lamp_bracket_v1@1

params:
  arm_len: 160mm
  channel_d: 8mm

Parameters

parameter	type	default	range	role
`arm_len`	`length`	`160mm`	`60mm … 190mm`	functional	exposed
`arm_w`	`length`	`22mm`	`12mm … 40mm`	structural
`arm_h`	`length`	`22mm`	`12mm … 40mm`	structural
`plate_l`	`length`	`70mm`	`50mm … 140mm`	assembly
`plate_w`	`length`	`46mm`	`30mm … 80mm`	assembly
`plate_t`	`length`	`6mm`	`4mm … 10mm`	manufacturing
`gusset`	`bool`	`True`	`—`	structural
`gusset_len`	`length`	`34mm`	`15mm … expr(arm_len * 0.4)`	structural
`gusset_drop`	`length`	`expr(arm_h * 0.6)`	`0mm … 30mm`	structural
`channel_d`wiring channel bore (v1 clamp — leaves >= 2mm wall)	`length`	`8mm`	`4mm … expr(min(arm_w, arm_h) - 4)`	functional	exposed
`screw`	`choice`	`M4`	`M3 \| M4 \| M5`	assembly
`screw_count`	`count`	`2`	`2 … 4`	assembly
`screw_spacing`	`length`	`expr(arm_w + 20)`	`expr(arm_w + 13) … expr(plate_l - 10)`	assembly
`mount_bc`bolt-circle diameter of tip thread pilots; match the cup's mount_bc (declare it once via assembly.shared)	`length`	`0mm`	`0mm … expr(arm_w - 10)`	assembly
`mount_screw`	`choice`	`M4`	`M3 \| M4 \| M5`	assembly
`mount_screw_count`	`count`	`4`	`2 … 6`	assembly
`mount_inset`cup center setback from the arm tip	`length`	`26mm`	`expr(mount_bc / 2 + 6) … expr(arm_len / 2)`	assembly
`pilot_depth`thread pilot depth — clamped so pilots never break into the wiring channel above	`length`	`expr(min(8, arm_h / 2 - channel_d / 2 - 2))`	`5mm … expr(arm_h / 2 - channel_d / 2 - 2)`	assembly

Regions

plate mounting surface
screw_zones fastener keepout
arm_root high stress region forbids: add_hex_perforation
arm_tip_face mounting surface
channel_zone soft contact surface

Contract

Guarantees

must-have features and invariants — verified on every build

cantilever_arm
wiring_channel
mounting_flange
channel_d <= min(arm_w, arm_h) - 4

Will refuse

explicit prohibitions — the engine refuses to build these

blocked_channel

Not claimed

what passing validation does not mean

Provided “as is” under Apache-2.0 — no warranty of fitness for a particular purpose.

Subscribed validators (14)

interface.frame_exists interface.frame_orthonormal interface.normal_points_outward interface.up_consistent form.channel_inside_walls form.cuts_respect_keepouts form.flange_above_cradle form.screw_access_clear topology.single_connected_solid topology.flange_above_cradle topology.screw_holes_open topology.countersinks_present topology.bores_open topology.channel_continuous

Source: src/artifact_forge_ng/catalog/data/archetypes/lamp_bracket_v1.yaml · forge @ 370e624