first_lay_cal.cpp File Reference

First layer (Z offset) calibration. More...

Functions
static constexpr float	__attribute__ ((noinline)) count_e(float layer_height
	Count extrude length. More...
void	lay1cal_wait_preheat ()
	Wait for preheat.
bool	lay1cal_load_filament (uint8_t filament)
	Load filament. More...
void	lay1cal_intro_line (bool extraPurgeNeeded, float layer_height, float extrusion_width)
	Print intro line. More...
void	lay1cal_before_meander ()
	Setup for printing meander.
void	lay1cal_meander_start (float layer_height, float extrusion_width)
	Print meander start.
void	lay1cal_meander (float layer_height, float extrusion_width)
	Print meander. More...
void	lay1cal_square (uint8_t step, float layer_height, float extrusion_width)
	Print square. More...
void	lay1cal_finish (bool mmu_enabled)

Variables
static constexpr float float	extrusion_width
static constexpr float float float	extrusion_length
static constexpr float float float float	filament_diameter
static const char zero_extrusion[]	PROGMEM = "G92 E0"

Detailed Description

Date

Jun 10, 2019

Author

Marek Bel

Function Documentation

__attribute__()

static constexpr float __attribute__ ( (noinline)  )

staticconstexpr

Parameters

layer_height	layer height in mm
extrusion_width	extrusion width in mm
extrusion_length	extrusion length in mm

Returns

filament length in mm which needs to be extruded to form line

lay1cal_intro_line()

void lay1cal_intro_line	(	bool	extraPurgeNeeded,
		float	layer_height,
		float	extrusion_width
	)

Parameters

extraPurgeNeeded	false if the first MMU-related "G1 E29" have to be skipped because the nozzle is already full of filament
layer_height	the height of the calibration layer
extrusion_width	the width of the extrusion layer

lay1cal_load_filament()

bool lay1cal_load_filament

(

uint8_t

filament

)

Parameters

cmd_buffer	character buffer needed to format gcodes
filament	filament to use (applies for MMU only)

Returns

true if extra purge distance is needed in case of MMU prints (after a toolchange), otherwise false

lay1cal_meander()

void lay1cal_meander	(	float	layer_height,
		float	extrusion_width
	)

Parameters

cmd_buffer

character buffer needed to format gcodes

lay1cal_square()

void lay1cal_square	(	uint8_t	step,
		float	layer_height,
		float	extrusion_width
	)

This function needs to be called 4 times with step of 0,4,8,12

Parameters

cmd_buffer	character buffer needed to format gcodes
i	iteration

Variable Documentation

filament_diameter

constexpr float float float float filament_diameter

Initial value:

=1.75f)
{
    return (extrusion_length * ((M_PI * pow(layer_height, 2)) / 4 + layer_height * (extrusion_width - layer_height))) / ((M_PI * pow(filament_diameter, 2)) / 4);
}
 
 
static constexpr float spacing(float layer_height, float extrusion_width, float overlap_factor=1.f)
{
    return extrusion_width - layer_height * (overlap_factor - M_PI/4);
}
 
 
static void lay1cal_common_enqueue_loop(const char * const * cmd_sequence, const uint8_t steps) {
    for (uint8_t i = 0; i < steps; ++i)
    {
        enquecommand_P(static_cast<char*>(pgm_read_ptr(cmd_sequence + i)));
    }
}
 
static const char extrude_fmt[] PROGMEM = "G1 X%d Y%d E%-.5f"