81 lines
3.8 KiB
C
81 lines
3.8 KiB
C
#pragma once
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#include <inttypes.h>
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#include <avr/pgmspace.h>
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// Settings for filament load / unload from the LCD menu.
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// This is for Prusa MK3-style extruders. Customize for your hardware.
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#define MMU2_FILAMENTCHANGE_EJECT_FEED 80.0
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#define NOZZLE_PARK_XY_FEEDRATE 50
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#define NOZZLE_PARK_Z_FEEDRATE 15
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// Nominal distance from the extruder gear to the nozzle tip is 87mm
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// However, some slipping may occur and we need separate distances for
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// LoadToNozzle and ToolChange.
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// - +5mm seemed good for LoadToNozzle,
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// - but too much (made blobs) for a ToolChange
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static constexpr float MMU2_LOAD_TO_NOZZLE_LENGTH = 87.0F + 5.0F;
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// As discussed with our PrusaSlicer profile specialist
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// - ToolChange shall not try to push filament into the very tip of the nozzle
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// to have some space for additional G-code to tune the extruded filament length
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// in the profile
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// Beware - this value is used to initialize the MMU logic layer - it will be sent to the MMU upon line up (written into its 8bit register 0x0b)
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// However - in the G-code we can get a request to set the extra load distance at runtime to something else (M708 A0xb Xsomething).
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// The printer intercepts such a call and sets its extra load distance to match the new value as well.
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static constexpr float MMU2_FILAMENT_SENSOR_POSITION = 0; // mm
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static constexpr float MMU2_LOAD_DISTANCE_PAST_GEARS = 5; // mm
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static constexpr uint8_t MMU2_TOOL_CHANGE_LOAD_LENGTH = static_cast<uint8_t>(MMU2_FILAMENT_SENSOR_POSITION + MMU2_LOAD_DISTANCE_PAST_GEARS); // mm
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static constexpr float MMU2_EXTRUDER_PTFE_LENGTH = 42.3f; // mm
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static constexpr float MMU2_EXTRUDER_HEATBREAK_LENGTH = 17.7f; // mm
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static constexpr float MMU2_LOAD_TO_NOZZLE_FEED_RATE = 20.0F; // mm/s
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static constexpr float MMU2_UNLOAD_TO_FINDA_FEED_RATE = 120.0F; // mm/s
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static constexpr float MMU2_VERIFY_LOAD_TO_NOZZLE_FEED_RATE = 50.0F; // mm/s
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static constexpr float MMU2_VERIFY_LOAD_TO_NOZZLE_TWEAK = -5.F; // mm used to shorten/lenghten (negative number -> shorten) the distange of verify load to nozzle
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// The first the MMU does is initialise its axis. Meanwhile the E-motor will unload 20mm of filament in approx. 1 second.
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static constexpr float MMU2_RETRY_UNLOAD_TO_FINDA_LENGTH = 80.0f; // mm
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static constexpr float MMU2_RETRY_UNLOAD_TO_FINDA_FEED_RATE = 80.0f; // mm/s
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// After loading a new filament, the printer will extrude the filament by this distance
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// and then retract it back to the original position. This is used to check if the
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// filament sensor reading flickers or filament is jammed.
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static constexpr float MMU2_CHECK_FILAMENT_PRESENCE_EXTRUSION_LENGTH = MMU2_EXTRUDER_PTFE_LENGTH + MMU2_EXTRUDER_HEATBREAK_LENGTH + MMU2_VERIFY_LOAD_TO_NOZZLE_TWEAK + MMU2_FILAMENT_SENSOR_POSITION;
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static constexpr uint8_t MMU2_NO_TOOL = 99;
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static constexpr uint32_t MMU_BAUD = 115200;
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struct E_Step {
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float extrude; ///< extrude distance in mm
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float feedRate; ///< feed rate in mm/s
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};
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static constexpr E_Step ramming_sequence[] PROGMEM = {
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{ 0.2816F, 1339.0F / 60.F},
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{ 0.3051F, 1451.0F / 60.F},
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{ 0.3453F, 1642.0F / 60.F},
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{ 0.3990F, 1897.0F / 60.F},
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{ 0.4761F, 2264.0F / 60.F},
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{ 0.5767F, 2742.0F / 60.F},
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{ 0.5691F, 3220.0F / 60.F},
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{ 0.1081F, 3220.0F / 60.F},
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{ 0.7644F, 3635.0F / 60.F},
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{ 0.8248F, 3921.0F / 60.F},
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{ 0.8483F, 4033.0F / 60.F},
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{ -15.0F, 6000.0F / 60.F},
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{ -24.5F, 1200.0F / 60.F},
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{ -7.0F, 600.0F / 60.F},
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{ -3.5F, 360.0F / 60.F},
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{ 20.0F, 454.0F / 60.F},
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{ -20.0F, 303.0F / 60.F},
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{ -35.0F, 2000.0F / 60.F},
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};
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static constexpr E_Step load_to_nozzle_sequence[] PROGMEM = {
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{ MMU2_EXTRUDER_PTFE_LENGTH, 810.0F / 60.F}, // feed rate = 13.5mm/s - Load fast while not at heatbreak
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{ MMU2_EXTRUDER_HEATBREAK_LENGTH, 198.0F / 60.F}, // feed rate = 3.3mm/s - Load slower once filament reaches heatbreak
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};
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