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Revert/cleanup mininum extruder height during M600

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This change restores the minimum extruder height for filament purge
during M600 from the current 50mm back to 27mm from FW 3.9.

We do this by introducing a new option for unload_filament() to indicate
that the unload is part of an automatic swap, and in such cases avoid
raising more than absolutely necessary (this will _also_ come in handy
to avoid the extra purge in PR #2318 during M600).

A new define MIN_Z_FOR_SWAP is introduced for this purpose.
MIN_Z_FOR_UNLOAD is still used for manual lcd unload and for M702 and
hasn't been changed.
This commit is contained in:
Yuri D'Elia 2021-04-21 19:07:58 +02:00
parent 10de97c042
commit 8d04316497
4 changed files with 11 additions and 9 deletions
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7
Firmware/Configuration.h
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@ -551,9 +551,10 @@ enum CalibrationStatus
// Try to maintain a minimum distance from the bed even when Z is
// unknown when doing the following operations
#define MIN_Z_FOR_LOAD 50
#define MIN_Z_FOR_UNLOAD 50
#define MIN_Z_FOR_PREHEAT 10
#define MIN_Z_FOR_LOAD 50 // lcd filament loading or autoload
#define MIN_Z_FOR_UNLOAD 50 // lcd filament unloading
#define MIN_Z_FOR_SWAP 27 // filament change (including M600)
#define MIN_Z_FOR_PREHEAT 10 // lcd preheat
#include "Configuration_adv.h"
#include "thermistortables.h"

2
Firmware/Marlin_main.cpp
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@ -3676,7 +3676,7 @@ static void gcode_M600(bool automatic, float x_position, float y_position, float
// Unload filament
if (mmu_enabled) extr_unload(); //unload just current filament for multimaterial printers (used also in M702)
else unload_filament(); //unload filament for single material (used also in M702)
else unload_filament(true); //unload filament for single material (used also in M702)
//finish moves
st_synchronize();

7
Firmware/ultralcd.cpp
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@ -4885,7 +4885,7 @@ void lcd_wizard(WizState state)
lcd_display_message_fullscreen_P(_i("Now I will preheat nozzle for PLA."));
wait_preheat();
//unload current filament
unload_filament();
unload_filament(true);
//load filament
lcd_wizard_load();
setTargetHotend(0, 0); //we are finished, cooldown nozzle
@ -6201,12 +6201,13 @@ static void change_extr_menu(){
#endif //SNMM
// unload filament for single material printer (used in M702 gcode)
void unload_filament()
// @param automatic: If true, unload_filament is part of a unload+load sequence (M600)
void unload_filament(bool automatic)
{
custom_message_type = CustomMsg::FilamentLoading;
lcd_setstatuspgm(_T(MSG_UNLOADING_FILAMENT));
raise_z_above(MIN_Z_FOR_UNLOAD);
raise_z_above(automatic? MIN_Z_FOR_SWAP: MIN_Z_FOR_UNLOAD);
// extr_unload2();

2
Firmware/ultralcd.h
View File

@ -195,7 +195,7 @@ extern bool bFilamentAction;
void mFilamentItem(uint16_t nTemp,uint16_t nTempBed);
void mFilamentItemForce();
void lcd_generic_preheat_menu();
void unload_filament();
void unload_filament(bool automatic = false);
void stack_error();
void lcd_printer_connected();