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command_ref.md

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Happy Hare - Command Reference

Firstly you can get a quick reminder of commands using the MMU_HELP command from the console:

MMU_HELP

    Happy Hare MMU commands: (use MMU_HELP MACROS=1 TESTING=1 for full command set)
    MMU : Enable/Disable functionality and reset state
    MMU_CHANGE_TOOL : Perform a tool swap
    MMU_CHECK_GATES : Automatically inspects gate(s), parks filament and marks availability
    MMU_STATS : Dump or reset the MMU statistics
    MMU_EJECT : Eject filament and park it in the MMU or optionally unloads just the extruder (EXTRUDER_ONLY=1)
    MMU_ENCODER : Display encoder position or temporarily enable/disable detection logic in encoder
    MMU_ENDLESS_SPOOL : Redefine the EndlessSpool groups
    MMU_FORM_TIP : Convenience macro to call the standalone tip forming functionality
    MMU_HELP : Display the complete set of MMU commands and function
    MMU_HOME : Home the MMU selector
    MMU_LOAD : Loads filament on current tool/gate or optionally loads just the extruder for bypass or recovery usage (EXTUDER_ONLY=1)
    MMU_MOTORS_OFF : Turn off both MMU motors
    MMU_PAUSE : Pause the current print and lock the MMU operations
    MMU_PRELOAD : Preloads filament at specified or current gate
    MMU_PRINT_END : Restore MMU idle state after print
    MMU_PRINT_START : Initialize MMU state and ready for print
    MMU_RECOVER : Recover the filament location and set MMU state after manual intervention/movement
    MMU_REMAP_TTG : Remap a tool to a specific gate and set gate availability
    MMU_RESET : Forget persisted state and re-initialize defaults
    MMU_SELECT : Select the specified logical tool (following TTG map) or physical gate
    MMU_SELECT_BYPASS : Select the filament bypass
    MMU_SERVO : Move MMU servo to position specified position or angle
    MMU_SET_GATE_MAP : Define the type and color of filaments on each gate
    MMU_STATUS : Complete dump of current MMU state and important configuration
    MMU_SYNC_GEAR_MOTOR : Sync the MMU gear motor to the extruder motor
    MMU_TOOL_OVERRIDES : Displays, sets or clears tool speed and extrusion factors (M220 & M221)
    MMU_UNLOCK : Wakeup the MMU prior to resume to restore temperatures and timeouts

#f03c15 #c5f015 #1589F0 Basic MMU functionality

Command Description                                     Parameters                                    
MMU Enable and reset state or disable the MMU. Useful to completely turn off the MMU functionality rather then uninstalling it. Note that persisted state will be reset when re-enabling ENABLE=[0|1]
MMU_HOME Home the MMU selector and optionally selects gate associated with the specified tool TOOL=[0..n] After homing, select gate associated with this tool
FORCE_UNLOAD=[0|1] Optional. If specified will override default intelligent filament unload behavior prior to homing
MMU_SELECT Selects the logical tool or physical gate. If tool is sepficed the gate associated with the specified tool (TTG map) will be selected TOOL=[0..n] The tool to be selected (will actually select the gate currently mapped to the tool with TTG)
GATE=[0..n] The gate to be selected (ignores TTG map)
MMU_SELECT_BYPASS Select the bypass selector position if configured None
MMU_CHANGE_TOOL Perform a tool swap (generally called from 'Tx' macros). Use STANDALONE=1 option in your print_start macro to saftely load the initial tool TOOL=[0..n]
STANDALONE=[0|1] Optional to force standalone logic (tip forming)
QUIET=[0|1] Optional to always suppress swap statistics
MMU_LOAD Loads filament in currently selected tool/gate to extruder. Optionally performs just the extruder load part of the sequence - designed for bypass loading or non MMU use EXTRUDER_ONLY=[0|1] To force just the extruder loading (automatic if bypass selected)
MMU_EJECT Eject filament and park it in the MMU gate or does the extruder unloading part of the unload sequence if in bypass EXTRUDER_ONLY=[0|1] To force just the extruder unloading (automatic if bypass selected)
MMU_PRELOAD Helper for filament loading. Feed filament into gate, MMU will catch it and correctly position at the specified gate GATE=[0..n] The specific gate to preload. If omitted the currently selected gate can be loaded
MMU_PAUSE Pause the current print and lock the MMU operations. (MMU_UNLOCK + RESUME or just RESUME to continue print) FORCE_IN_PRINT=[0|1] This option forces the handling of pause as if it occurred in print and is useful for testing. Calls PAUSE by default or your pause_macro if set
MMU_RECOVER Recover filament position and optionally reset MMU state. Useful to call prior to RESUME if you intervene/manipulate filament by hand TOOL=[0..n]|-2 Optionally force set the currently selected tool (-2 = bypass). Use caution!
GATE=[0..n] Optionally force set the currently selected gate if TTG mapping is being leveraged otherwise it will get the gate associated with current tool. Use caution!
LOADED=[0|1] Optionally specify if the filamanet is fully loaded or fully unloaded. Use caution! If not specified, MMU will try to discover filament position
STRICT=[0|1] If automatically detecting impose stricter testing for filament position (temporarily sets 'strict_filament_recovery' parameter)
MMU_ENCODER Displays the current value of the MMU encoder or explicitly enable or disable the encoder. Note that the encoder state is set automatically so this will only be sticky until next tool change ENABLE=[0|1] Enable/Disable
VALUE=.. Set the current distance
MMU_TOOL_OVERRIDES Displays, sets or clears tool speed and extrusion factors (M220 & M221) TOOL=[0..n] Specify tool to set
M220=[0-200] Speed (feedrate) multiplier percentage
M221=[0-200] Extrusion multiplier percentage
RESET=1 Reset specified override for specified tool to default 100%. Note that omitting TOOL= will reset all tools
MMU_UNLOCK Wakeup the MMU prior to RESUME to restore temperatures and timeouts None
MMU_HELP Generate reminder list of command set TESTING=[0|1] Also list the testing commands
MACROS=[0|1] Also list the callback backros

Command Description                                     Parameters                                    
_MMU_PRINT_START Initialize MMU state and ready for print (optionally include in print start macro) None
_MMU_PRINT_END Restore MMU idle state after print (optionally include in print end macro) None

Filament specification, Tool to Gate map and Endless spool commands

Command Description                             Parameters                           &nbsp
MMU_CHECK_GATES Inspect the gate(s) and mark availability GATE=[0..n] The specific gate to check
TOOL=[0..n] The specific too to check (same as gate if no TTG mapping in place)
TOOLS={csv} The list of tools to check. Typically used in print start macro to validate all necessary tools
If all parameters are omitted all gates will be checked (the default)
QUIET=[0|1] Optional. Supresses dump of gate status at end of checking procedure
MMU_SET_GATE_MAP Optionally configure the filament type, color and availabilty. Used in colored UI's and available via printer variables in your print_start macro RESET=[0|1] If specified the 'gate_materials, 'gate_colors' and 'gate_status' will be reset to that defined in mmu_parameters.cfg
DISPLAY=[0|1] To simply display the current gate map
The following must be specified together to create a complete entry in the gate map:
GATE=[0..n] Gate numer
MATERIAL=.. The material type. Short, no spaces. e.g. "PLA+"
COLOR=.. The color of the filament. Can be a string representing one of the w3c color names e.g. "violet" or a color string in the hexadeciaml format RRGGBB e.g. "ff0000" for red. NO space or # symbols. Empty string for no color
AVAILABLE=[0|1|2] Optionally marks gate as empty (0) or available from spool (1) or available from buffer (2)
QUIET=[0|1] Optional. Supresses dump of current gate map to log file
MMU_REMAP_TTG Reconfiguration of the Tool - to - Gate (TTG) map. Can also set gates as empty! RESET=[0|1] If specified the Tool -> Gate mapping will be reset to that defined in mmu_parameters.cfg
TOOL=[0..n] Tool to set in TTG map
GATE=[0..n] Maps specified tool to this gate (multiple tools can point to same gate)
AVAILABLE=[0|1] Marks gate as available or empty
QUIET=[0|1] Optional. Supresses dump of current TTG map to log file
MAP={csv} List of gates, one for each tool to specify the entire TTG map for bulk updates
MMU_ENDLESS_SPOOL Modify the defined EndlessSpool groups at runtime RESET=[0|1] If specified the EndlessSpool groups will be reset to that defined in mmu_parameters.cfg
GROUPS={csv of groups} The same format as the default groups defined in mmu_parameters.cfg. Must be the same length as the number of MMU gates

Status, Logging and Persisted state

Command Description Parameters
MMU_RESET Reset the MMU persisted state back to defaults CONFIRM=[0|1] Must be sepcifed for affirmative action of this dangerous command
MMU_STATS Dump (and optionally reset) the MMU statistics for current print job or total RESET=[0|1] If 1 the persisted statistics will be reset
TOTAL=[0|1] whether to also show the total swap stats in addition to the current/last print job
DETAIL=[0|1] Whether to display additional details about the per-gate statistics
MMU_STATUS Report on MMU state, capabilities and Tool-to-Gate map DETAIL=[0|1] Whether to show a more detailed view including EndlessSpool groups and full Tool-To-Gate mapping
SHOWCONFIG=[0|1] (default 0) Whether or not to describe the machine configuration in status message

Servo and motor control

Command Description Parameters
MMU_SERVO Set the servo to specified postion or a sepcific angle for testing. POS=[up|down|move] Move servo to predetermined position
ANGLE=.. Move servo to specified angle
MMU_MOTORS_OFF Turn off both MMU motors None
MMU_SYNC_GEAR_MOTOR Explicitly override the synchronization of extruder and gear motors. Note that synchronization is set automatically so this will only be sticky until the next tool change SYNC=[0|1] Turn gear/extruder synchronization on/off (default 1)
SERVO=[0|1] If 1 (the default) servo will engage if SYNC=1 or disengage if SYNC=0 otherwise servo position will not change
IN_PRINT=[0|1] If 1, gear stepper current will be set according to sync_gear_current. If 0, gear stepper current is set to 100%. The default is automatically determined based on print state but can be overridden with this argument. Only meaningful if SYNC=1

#f03c15 #c5f015 #1589F0 Calibration

    MMU_CALIBRATE_BOWDEN - Calibration of reference bowden length for gate #0
    MMU_CALIBRATE_ENCODER - Calibration routine for the MMU encoder
    MMU_CALIBRATE_GATES - Optional calibration of individual MMU gate
    MMU_CALIBRATE_GEAR - Calibration routine for gear stepper rotational distance
    MMU_CALIBRATE_SELECTOR - Calibration of the selector positions or postion of specified gate
Command Description                                 Parameters                                
MMU_CALIBRATE_GEAR Calibration rourine for the the gear stepper rotational distance LENGTH=.. length to test over (default 100mm)
MEASURED=.. User measured distance
SAVE=[0|1] (default 1) Whether to save the result
MMU_CALIBRATE_ENCODER Calibration routine for MMU encoder LENGTH=.. Distance (mm) to measure over. Longer is better, defaults to 400mm
REPEATS=.. Number of times to average over
SPEED=.. Speed of gear motor move. Defaults to long move speed
ACCEL=.. Accel of gear motor move. Defaults to motor setting in ercf_hardware.cfg
MINSPEED=.. & MAXSPEED=.. If specified the speed is increased over each iteration between these speeds (only for experimentation)
SAVE=[0|1] (default 1) Whether to save the result
MMU_CALIBRATE_SELECTOR Calibration of the selector gate positions. By default will automatically calibrate every gate. ERCF v1.1 users must specify the bypass block position if fitted. If GATE to BYPASS option is sepcifed this will update the calibrate for a single gate GATE=[0..n] The individual gate position to calibrate
BYPASS=[0|1] Calibrate the bypass position
BYPASS_BLOCK=.. Optional (v1.1 only). Which bearing block contains the bypass where the first one is numbered 1
SAVE=[0|1] (default 1) Whether to save the result
MMU_CALIBRATE_BOWDEN Measure the calibration length of the bowden tube used for fast load movement. This will be performed on gate #0 BOWDEN_LENGTH=.. The approximate length of the bowden tube but NOT longer than the real measurement. 50mm less that real is a good starting point
HOMING_MAX=.. (default 100) The distance after the sepcified BOWDEN_LENGTH to search of the extruder entrance
REPEATS=.. (default 3) Number of times to average measurement over
SAVE=[0|1] (default 1) Whether to save the result
MMU_CALIBRATE_GATES Optional calibration for loading of a sepcifed gate or all gates. This is calculated as a ratio of gate #0 and thus this is usually the last calibration step GATE=[0..n] The individual gate position to calibrate
ALL[0|1] Calibrate all gates 1..n sequentially (filament must be available in each gate)
LENGTH=.. Distance (mm) to measure over. Longer is better, defaults to 400mm
REPEATS=.. Number of times to average over
SAVE=[0|1] (default 1) Whether to save the result

#f03c15 #c5f015 #1589F0 Testing

    MMU_SOAKTEST_LOAD_SEQUENCE - Soak test tool load/unload sequence
    MMU_SOAKTEST_SELECTOR - Soak test of selector movement
    MMU_TEST_BUZZ_MOTOR - Simple buzz the selected motor (default gear) for setup testing
    MMU_TEST_CONFIG - Runtime adjustment of MMU configuration for testing or in-print tweaking purposes
    MMU_TEST_ENCODER_RUNOUT - Convenience macro to spoof a filament runout condition
    MMU_TEST_GRIP - Test the MMU grip for a Tool
    MMU_TEST_HOMING_MOVE - Test filament homing move to help debug setup / options
    MMU_TEST_LOAD - For quick testing filament loading from gate to the extruder
    MMU_TEST_MOVE - Test filament move to help debug setup / options
    MMU_TEST_TRACKING - Test the tracking of gear feed and encoder sensing
Command                 Description                 Parameters
MMU_SOAKTEST_SELECTOR Reliability testing to put the selector movement under stress to test for failures. Randomly selects gates and occasionally re-homes LOOP=..[100] Number of times to repeat the test
SERVO=[0|1] Whether to include the servo down movement in the test
MMU_SOAKTEST_LOAD_SEQUENCE Soak testing of load sequence. Great for testing reliability and repeatability LOOP=..[10] Number of times to loop while testing
RANDOM=[0|1] Whether to randomize tool selection
FULL=[0|1] Whether to perform full load to nozzle or short load just past encoder
MMU_TEST_BUZZ_MOTOR Buzz the sepcified MMU motor. If the gear motor is buzzed it will also report if filament is detected MOTOR=[gear|selector|servo]
MMU_TEST_GRIP Test the MMU grip of the currently selected tool by gripping filament but relaxing the gear motor so you can check for good contact None
MMU_TEST_LOAD Test loading filament from park position in the gate. (MMU_EJECT will unload) LENGTH=..[100] Test load the specified length of filament into selected tool
FULL=[0|1] If set to one a full bowden move will occur and filament will home to extruder
`MMU_TEST_TRACKING Simple visual test to see how encoder tracks with gear motor DIRECTION=[-1|1] Direction to perform the test (default load direction)
STEP=[0.5 .. 20] Size of individual steps (default 1mm)
SENSITIVITY=.. (defaults to expected encoder resolution) Sets the scaling for the +/- mismatch visualization
MMU_TEST_MOVE Simple test move the MMU gear stepper MOVE=..[100] Length of gear move in mm
SPEED=.. (defaults to speed defined to type of motor/homing combination) Stepper move speed
ACCEL=.. (defaults to min accel defined on steppers employed in move) Motor acceleration
MOTOR=[gear|extruder|gear+extruder|extruder+gear] (default: gear) The motor or motor combination to employ. gear+extruder commands the gear stepper and links extruder to movement, extruder+gear commands the extruder stepper and links gear to movement
MMU_TEST_HOMING_MOVE Testing homing move of filament using multiple stepper combinations specifying endstop and driection of homing move MOVE=..[100] Length of gear move in mm
SPEED=.. (defaults to speed defined to type of motor/homing combination) Stepper move speed
ACCEL=.. Motor accelaration (defaults to min accel defined on steppers employed in homing move)
MOTOR=[gear|extruder|gear+extruder|extruder+gear] (default: gear) The motor or motor combination to employ. gear+extruder commands the gear stepper and links extruder to movement, extruder+gear commands the extruder stepper and links gear to movement. This is important for homing because the endstop must be on the commanded stepper
ENDSTOP=.. Symbolic name of endstop to home to as defined in mmu_hardware.cfg. Must be defined on the primary stepper
STOP_ON_ENDSTOP=[1|-1] (default 1) The direction of homing move. 1 is in the normal direction with endstop firing, -1 is in the reverse direction waiting for endstop to release. Note that virtual (touch) endstops can only be homed in a forward direction
MMU_TEST_CONFIG Dump / Change essential load/unload config options at runtime Many. Best to run MMU_TEST_CONFIG without options to report all parameters than can be specified
MMU_TEST_ENCODER_RUNOUT Filament runout handler that will also implement EndlessSpool if enabled FORCE_RUNOUT=1 is useful for testing to validate your _MMU_ENDLESS_SPOOL** macros

#f03c15 #c5f015 #1589F0 User defined/configurable macros (defined in mmu_software.cfg)

Macro Description Supplied Parameters
_MMU_PRE_UNLOAD Called prior to unloading on toolchange
_MMU_POST_LOAD Called subsequent to loading new filament on toolchange
_MMU_ENDLESS_SPOOL_PRE_UNLOAD Called prior to unloading the remains of the current filament
_MMU_ENDLESS_SPOOL_POST_LOAD Called subsequent to loading filament in the new gate in the sequence
_MMU_FORM_TIP_STANDALONE Called to create tip on filament when not in print (and under the control of the slicer). You tune this macro by modifying the defaults to the parameters
_MMU_ACTION_CHANGED Callback that is called everytime the printer.ercf.action is updated. Great for contolling LED lights, etc
_MMU_LOAD_SEQUENCE Called when MMU is asked to load filament FILAMENT_POS LENGTH FULL HOME_EXTRUDER SKIP_EXTRUDER EXTRUDER_ONLY
_MMU_UNLOAD_SEQUENCE Called when MMU is asked to unload filament FILAMENT_POS LENGTH EXTRUDER_ONLY PARK_POS

#f03c15 #c5f015 #1589F0 Internal macros for custom composition of load/unload sequences

Macro             Description             Parameters
_MMU_STEP_LOAD_ENCODER User composable loading step: Move filament from gate to start of bowden using encoder
_MMU_STEP_LOAD_BOWDEN User composable loading step: Smart loading of bowden LENGTH=..
_MMU_STEP_HOME_EXTRUDER User composable loading step: Extruder collision detection
_MMU_STEP_LOAD_TOOLHEAD User composable loading step: Toolhead loading EXTRUDER_ONLY=[0|1]
_MMU_STEP_UNLOAD_TOOLHEAD User composable unloading step: Toolhead unloading EXTRUDER_ONLY=[0|1] PARK_POS=..
_MMU_STEP_UNLOAD_BOWDEN User composable unloading step: Smart unloading of bowden FULL=[0|1] LENGTH=..
_MMU_STEP_UNLOAD_ENCODER User composable unloading step: Move filament from start of bowden and park in the gate using encoder FULL=[0|1]
_MMU_STEP_SET_FILAMENT User composable loading step: Set filament position state STATE=[0..8] SILENT=[0|1]
_MMU_STEP_MOVE User composable loading step: Generic move MOVE=..[100] Length of gear move in mm
SPEED=.. (defaults to speed defined to type of motor/homing combination) Stepper move speed
ACCEL=.. (defaults to min accel defined on steppers employed in move) Motor acceleration
MOTOR=[gear|extruder|gear+extruder|extruder+gear] (default: gear) The motor or motor combination to employ. gear+extruder commands the gear stepper and links extruder to movement, extruder+gear commands the extruder stepper and links gear to movement
_MMU_STEP_HOMING_MOVE User composable loading step: Generic homing move MOVE=..[100] Length of gear move in mm
SPEED=.. (defaults to speed defined to type of motor/homing combination) Stepper move speed
ACCEL=.. Motor accelaration (defaults to min accel defined on steppers employed in homing move)
MOTOR=[gear|extruder|gear+extruder|extruder+gear] (default: gear) The motor or motor combination to employ. gear+extruder commands the gear stepper and links extruder to movement, extruder+gear commands the extruder stepper and links gear to movement. This is important for homing because the endstop must be on the commanded stepper
ENDSTOP=.. Symbolic name of endstop to home to as defined in mmu_hardware.cfg. Must be defined on the primary stepper
STOP_ON_ENDSTOP=[1|-1] (default 1) The direction of homing move. 1 is in the normal direction with endstop firing, -1 is in the reverse direction waiting for endstop to release. Note that virtual (touch) endstops can only be homed in a forward direction

Note

Working reference PAUSE / RESUME / CANCEL_PRINT macros are defined in client_macros.cfg and can be used/modified if you don't already have your own


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(")_(") MMU Ready