155 lines
7.4 KiB
INI
155 lines
7.4 KiB
INI
 
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#####################################################################
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# Purge check - did the filament really reach the nozzle during the
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# Blobifier purge after a tool change?
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#
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# Two independent checks around the purge AFC runs after every load:
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# 1. bdwidth motion: extruded mm vs mm the sensor saw moving past it.
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# Catches a grinding extruder, a tangle or a snapped filament.
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# 2. bd_pressure (needs the load-check firmware extension): how long
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# the nozzle pressure stayed above the threshold. Catches filament
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# that never reached the melt zone. Skipped automatically on stock
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# firmware or when bdpressure_check.py is not installed.
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#
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# Needs: bdwidth_status.py in ~/klipper/klippy/extras/
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# bdpressure_check.py in ~/klipper/klippy/extras/ (optional)
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# (klipper/install.sh links both; guide: klipper/load_check/afc_blobifier/README.md)
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# Hook: in [AFC] (AFC/AFC.cfg) change poop_cmd: BLOBIFIER
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# to poop_cmd: BLOBIFIER_CHECKED
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#
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# Rollout:
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# Phase 1 mode "report": only prints the results after every purge.
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# Collect a few days of values, then set min_ratio and
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# pressure_min_ms well below the lowest good ones.
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# Phase 2 mode "enforce": pauses when a check fails.
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#
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# Costs about 2 x (sample_time + 0.5 s) per swap, 5 s at sample_time 2,
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# so the sensors are quiet and up to date before and after the purge.
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# When bdwidth is not reading, add bdwidth_warmup_ms: it is switched on for
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# the check (motion only, SET_BDWIDTH ENABLE_MOTION) with its runout pause
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# off meanwhile (SET_FILAMENT_SENSOR), and outside a print off again after.
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#####################################################################
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[bdwidth_status]
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sensor: fila_width_0
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# Remove this section if bdpressure_check.py is not installed
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[bdpressure_check]
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sensor: bd_pa
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[gcode_macro _PURGE_CHECK_CFG]
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variable_mode: "enforce" # report | enforce | off
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variable_motion_check: False # False: skip the bdwidth motion check, pressure only
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variable_min_ratio: 0.4 # placeholder: sensed mm / extruded mm below this = not feeding
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variable_min_extrude: 20 # skip the checks for purges shorter than this (mm)
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variable_pressure_min_ms: 5000 # placeholder: longest continuous pressure needed (ms)
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# bdwidth is not reading after SET_BDWIDTH ... COMMAND=DISABLE and after
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# every Klipper restart until an ENABLE (outside a print, often early in a
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# print start). The check then switches it on and waits this long for the
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# first readings (its first read often fails and it retries after 10 s).
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variable_bdwidth_warmup_ms: 15000
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variable_start_counts: 0
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variable_start_e: 0.0
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gcode:
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[gcode_macro BLOBIFIER_CHECKED]
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description: Blobifier purge with bdwidth motion and bd_pressure checks (use as poop_cmd in [AFC])
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gcode:
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{% set cfg = printer["gcode_macro _PURGE_CHECK_CFG"] %}
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{% set wait = (printer.bdwidth_status.sample_time * 1000 + 500)|int %}
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{% set pressure = 'bdpressure_check' in printer %}
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{% set bdw = printer.bdwidth_status.name %}
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# If bdwidth is not reading (outside a print, early in a print start,
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# after a Klipper restart) it is switched on for the check, with its
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# runout response off meanwhile, so an empty lane does not make bdwidth
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# pause the printer (the check reports it instead). Afterwards the
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# runout response is restored; bdwidth itself is only switched off
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# again outside a print, so a print never loses it.
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{% set bdw_on = cfg.motion_check and not printer.bdwidth_status.reading|default(false) %}
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{% set bdw_off = bdw_on and printer.print_stats.state not in ["printing", "paused"] %}
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{% set runout_was = 1 if printer.bdwidth_status.enabled else 0 %}
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# Without the motion check, bdwidth's own runout response is off during
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# the purge too, so a bdwidth that does not see the movement cannot
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# pause the printer here; the pressure check judges the purge.
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{% set runout_off = bdw_on or not cfg.motion_check %}
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{% if cfg.mode == "off" %}
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BLOBIFIER {rawparams}
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{% else %}
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M400
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{% if runout_off %}
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SET_FILAMENT_SENSOR SENSOR={bdw} ENABLE=0
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{% endif %}
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{% if bdw_on %}
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SET_BDWIDTH NAME={bdw} COMMAND=ENABLE_MOTION
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G4 P{cfg.bdwidth_warmup_ms}
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{% endif %}
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G4 P{wait}
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_PURGE_CHECK_START
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{% if pressure %}
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BDP_CHECK_START
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{% endif %}
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BLOBIFIER {rawparams}
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M400
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{% if pressure %}
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BDP_CHECK_STOP
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{% endif %}
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G4 P{wait}
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_PURGE_CHECK_END
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{% if bdw_off %}
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SET_BDWIDTH NAME={bdw} COMMAND=DISABLE
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{% endif %}
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{% if runout_off %}
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SET_FILAMENT_SENSOR SENSOR={bdw} ENABLE={runout_was}
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{% endif %}
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{% endif %}
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# Separate macros so the status is read when they run, not when
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# BLOBIFIER_CHECKED is rendered
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[gcode_macro _PURGE_CHECK_START]
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gcode:
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SET_GCODE_VARIABLE MACRO=_PURGE_CHECK_CFG VARIABLE=start_counts VALUE={printer.bdwidth_status.total_move}
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SET_GCODE_VARIABLE MACRO=_PURGE_CHECK_CFG VARIABLE=start_e VALUE={printer.toolhead.position.e}
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[gcode_macro _PURGE_CHECK_END]
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gcode:
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{% set cfg = printer["gcode_macro _PURGE_CHECK_CFG"] %}
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{% set s = printer.bdwidth_status %}
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{% set lane = printer.AFC.current_load|default("?", true) %}
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{% set extruded = printer.toolhead.position.e - cfg.start_e %}
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{% set failed = [] %}
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{% if extruded < cfg.min_extrude %}
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RESPOND MSG="PURGE_CHECK {lane}: only {'%.1f' % extruded} mm extruded, skipped"
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{% else %}
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{% set motion_on = cfg.motion_check and s.active != "disable" %}
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{% if not cfg.motion_check %}
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{% set motion = "motion check off" %}
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{% elif not motion_on %}
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{% set motion = "motion skipped (bdwidth disabled)" %}
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{% else %}
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{% set sensed = (s.total_move - cfg.start_counts)|abs / s.linear_motion %}
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{% set ratio = sensed / extruded %}
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{% set motion = "motion %.1f/%.1f mm ratio %.2f, width %.2f" % (sensed, extruded, ratio, s.diameter) %}
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{% if ratio < cfg.min_ratio %}
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{% if s.total_move == 0 and s.diameter == 0 %}
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{% set _ = failed.append("no data from bdwidth since Klipper start (sensor connected?)") %}
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{% else %}
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{% set _ = failed.append("filament not moving past bdwidth") %}
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{% endif %}
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{% endif %}
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{% endif %}
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{% if 'bdpressure_check' in printer and printer.bdpressure_check.available %}
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{% set p = printer.bdpressure_check %}
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{% set press = "pressure longest %d ms, total %d ms, peak %d" % (p.longest_ms, p.above_ms, p.peak) %}
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{% if p.longest_ms < cfg.pressure_min_ms %}
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{% set _ = failed.append("no sustained nozzle pressure") %}
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{% endif %}
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{% else %}
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{% set press = "pressure skipped (no check firmware)" %}
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{% endif %}
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{% set checked = motion_on or 'bdpressure_check' in printer and printer.bdpressure_check.available %}
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{% set verdict = 'FAIL: ' ~ failed|join(', ') if failed else ('OK' if checked else 'NOTHING CHECKED') %}
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RESPOND MSG="PURGE_CHECK {lane}: {motion}; {press} -> {verdict}"
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{% if failed and cfg.mode == "enforce" %}
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RESPOND TYPE=error MSG="PURGE_CHECK: {lane} {failed|join(', ')} - check extruder and lane"
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PAUSE
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{% endif %}
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{% endif %}
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