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home-3d-printing

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UpdatedJuly 10, 2026 at 16:26

Slices models and drives a home Klipper/Moonraker 3D printer via the local printctl CLI — slice with OrcaSlicer, upload, arm, start, monitor, pause/cancel, e-stop — with hard temperature caps and an arm-before-heat gate. Works with any Klipper/Moonraker printer; the specific model, material and caps come from config (run `printctl doctor`). Use when the user wants to 3D-print at home, slice an STL/3MF, or check/control the printer. Do not use for CAD/mesh modeling, cloud/non-local printers, or non-Klipper firmware.

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larsboes

larsboes/Axon

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SKILL.md

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name	home-3d-printing
description	Slices models and drives a home Klipper/Moonraker 3D printer via the local printctl CLI — slice with OrcaSlicer, upload, arm, start, monitor, pause/cancel, e-stop — with hard temperature caps and an arm-before-heat gate. Works with any Klipper/Moonraker printer; the specific model, material and caps come from config (run `printctl doctor`). Use when the user wants to 3D-print at home, slice an STL/3MF, or check/control the printer. Do not use for CAD/mesh modeling, cloud/non-local printers, or non-Klipper firmware.
allowed-tools	Read, Bash

Home 3D Printing

Drive the printer through $PC (printctl) — the source of truth; this skill is the runbook. Physical hardware that heats and moves: safety gates are not optional, and no step may route around them.

This setup is not hardcoded. Printer host, model, nozzle, material and safety caps all live in $AXON_PERSONAL_ROOT/config/printing.json and are surfaced (and, when the printer is on, live-discovered) by $PC doctor. Run $PC doctor first and read the real values off it — never assume a printer model or temp from this document.

Variables

var	value	notes
`$PC`	`scripts/printctl`	launcher → `$AXON_ROOT/capabilities/printing/printctl.py` (runs via uv)
`$HOST` `$MODEL` `$MATERIAL` `$NOZZLE_MAX` `$BED_MAX`	(from config)	host, printer model, loaded filament, hard temp caps — all read from the overlay config; `$PC doctor` prints them. Never inline them here.
`$STL`	—	model to slice (`.stl`/`.3mf`)
`$GCODE`	`${STL%.*}.gcode`	slice output, sits next to `$STL`
`$FN`	`$(basename $GCODE)`	filename as the printer sees it (arm/start key)
`$WALLS` / `$INFILL`	`4–6` / `40–50% gyroid`	generic strength-part guidance, not a fixed setting

Safety model — non-negotiable

Caps ($NOZZLE_MAX/$BED_MAX) enforced on sliced gcode and at arm. Above → refused.
Arm-before-heat: start/resume refuse unless $FN was armed. Arming IS the human "go"; after it, start+monitor run unattended within caps.
Runaway temp/motion → $PC estop immediately (halts Klipper; needs FIRMWARE_RESTART after).
Never curl the heat/move endpoints directly to skip the gate.

Preflight — gate on the output

$PC doctor, then branch:

moonraker: REACHABLE ✓ → continue.
moonraker: unreachable → printer off/asleep or off-LAN. Stop, ask the user to power it on. Do not retry blindly.
any preset shows (unset) or not found → headless slicing unconfigured. Read references/setup.md, stop at the one-time GUI step (needs the user).

Print workflow

- [ ] 1. doctor green (reachable + presets ✓)
- [ ] 2. slice   → $GCODE, temps ≤ caps
- [ ] 3. upload  → printer
- [ ] 4. arm     → state plan, get user go
- [ ] 5. start + monitor

$PC slice $STL → writes $GCODE, prints resolved nozzle/bed. Refuses over caps. "process not compatible with printer" → config points at system presets, not saved user presets → references/setup.md.
$PC upload $GCODE.
State part + $MATERIAL + expected temps to the user; on their go: $PC arm $FN --local $GCODE (re-checks temps).
$PC start $FN then $PC monitor. start REFUSED → $FN wasn't armed (gate working) → do step 3.

Other commands

$PC status (json) · $PC files · $PC pause · $PC resume $FN · $PC cancel · $PC estop. Ad-hoc Moonraker beyond printctl → references/moonraker-api.md.

Strength parts (mounts, brackets under load)

Strength process preset, $WALLS walls, $INFILL, $MATERIAL (PETG/ASA, not PLA), orient so layer lines are not parallel to the pull force, brim on small parts. Worked example (personal): $AXON_PERSONAL_ROOT/documents/vanmoof-s3-phone-mount-3d-print.md.

Provenance and maintenance

Verified 2026-07-09: printer at $HOST (overlay config), OrcaSlicer 2.4.2, $PC → $AXON_ROOT/capabilities/printing/printctl.py. Re-verify on drift:

reachable + config: $PC doctor
safety gates intact: $PC selftest (must end ALL PASS ✓)
printctl path: test -f "$AXON_ROOT/capabilities/printing/printctl.py" && echo ok
OrcaSlicer preset limitation is a standing constraint, not a bug → references/setup.md §3.

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name	home-3d-printing
description	Slices models and drives a home Klipper/Moonraker 3D printer via the local printctl CLI — slice with OrcaSlicer, upload, arm, start, monitor, pause/cancel, e-stop — with hard temperature caps and an arm-before-heat gate. Works with any Klipper/Moonraker printer; the specific model, material and caps come from config (run `printctl doctor`). Use when the user wants to 3D-print at home, slice an STL/3MF, or check/control the printer. Do not use for CAD/mesh modeling, cloud/non-local printers, or non-Klipper firmware.
allowed-tools	Read, Bash

Home 3D Printing

Variables

var	value	notes
`$PC`	`scripts/printctl`	launcher → `$AXON_ROOT/capabilities/printing/printctl.py` (runs via uv)
`$HOST` `$MODEL` `$MATERIAL` `$NOZZLE_MAX` `$BED_MAX`	(from config)	host, printer model, loaded filament, hard temp caps — all read from the overlay config; `$PC doctor` prints them. Never inline them here.
`$STL`	—	model to slice (`.stl`/`.3mf`)
`$GCODE`	`${STL%.*}.gcode`	slice output, sits next to `$STL`
`$FN`	`$(basename $GCODE)`	filename as the printer sees it (arm/start key)
`$WALLS` / `$INFILL`	`4–6` / `40–50% gyroid`	generic strength-part guidance, not a fixed setting

Safety model — non-negotiable

Caps ($NOZZLE_MAX/$BED_MAX) enforced on sliced gcode and at arm. Above → refused.
Arm-before-heat: start/resume refuse unless $FN was armed. Arming IS the human "go"; after it, start+monitor run unattended within caps.
Runaway temp/motion → $PC estop immediately (halts Klipper; needs FIRMWARE_RESTART after).
Never curl the heat/move endpoints directly to skip the gate.

Preflight — gate on the output

$PC doctor, then branch:

moonraker: REACHABLE ✓ → continue.
moonraker: unreachable → printer off/asleep or off-LAN. Stop, ask the user to power it on. Do not retry blindly.
any preset shows (unset) or not found → headless slicing unconfigured. Read references/setup.md, stop at the one-time GUI step (needs the user).

Print workflow

- [ ] 1. doctor green (reachable + presets ✓)
- [ ] 2. slice   → $GCODE, temps ≤ caps
- [ ] 3. upload  → printer
- [ ] 4. arm     → state plan, get user go
- [ ] 5. start + monitor

$PC slice $STL → writes $GCODE, prints resolved nozzle/bed. Refuses over caps. "process not compatible with printer" → config points at system presets, not saved user presets → references/setup.md.
$PC upload $GCODE.
State part + $MATERIAL + expected temps to the user; on their go: $PC arm $FN --local $GCODE (re-checks temps).
$PC start $FN then $PC monitor. start REFUSED → $FN wasn't armed (gate working) → do step 3.

Other commands

$PC status (json) · $PC files · $PC pause · $PC resume $FN · $PC cancel · $PC estop. Ad-hoc Moonraker beyond printctl → references/moonraker-api.md.

Strength parts (mounts, brackets under load)

Provenance and maintenance

Verified 2026-07-09: printer at $HOST (overlay config), OrcaSlicer 2.4.2, $PC → $AXON_ROOT/capabilities/printing/printctl.py. Re-verify on drift:

reachable + config: $PC doctor
safety gates intact: $PC selftest (must end ALL PASS ✓)
printctl path: test -f "$AXON_ROOT/capabilities/printing/printctl.py" && echo ok
OrcaSlicer preset limitation is a standing constraint, not a bug → references/setup.md §3.