Klipper macro automation via Moonraker: pause/resume/filament change
domain: klipper3d.org · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Define custom G-code macros in printer.cfg using [gcode_macro MACRO_NAME] blocks (e.g. PAUSE, RESUME, filament-change routines), which Klipper exposes as pseudo G-code commands.
Ensure the [pause_resume] config section is present so PAUSE/RESUME have position-capture/restore support to build on.
Implement a filament-change macro (commonly bound to M600) that pauses, parks the toolhead, and retracts filament, then calls RESUME to continue after the swap.
Trigger any defined macro remotely through Moonraker by issuing its gcode command via the printer/gcode/script endpoint (or the equivalent JSON-RPC method over the socket).
Monitor macro execution/state via Moonraker printer object queries (e.g. gcode_move, print_stats) to confirm the pause/resume/filament-change completed as expected.
Known gotchas
Macros are just named G-code aggregates recognized by Klipper — Moonraker doesn't validate their internal logic, so a broken macro fails silently from the API's perspective (it just sends the command).
M600 behavior (retraction distance, park position) must be tuned per printer/extruder in the macro definition; default sample macros are starting points, not universal values.
Overriding built-in gcode commands (like redefining G28 or M600 via gcode_macro) changes global printer behavior for all callers, not just Moonraker-triggered ones — coordinate with other macro sources (KlipperScreen, Mainsail configs) to avoid conflicts.
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