static void lcd_menu_insert_material_preheat()
{
    setTargetHotend(material[active_extruder].temperature, active_extruder);
    int16_t temp = degHotend(active_extruder) - 20;
    int16_t target = degTargetHotend(active_extruder) - 20 - 10;
    if (temp < 0) temp = 0;
    if (temp > target && !is_command_queued())
    {
        set_extrude_min_temp(0);
        for(uint8_t e=0; e<EXTRUDERS; e++)
            volume_to_filament_length[e] = 1.0;//Set the extrusion to 1mm per given value, so we can move the filament a set distance.

        currentMenu = lcd_menu_change_material_insert_wait_user;
        temp = target;
    }

    uint8_t progress = uint8_t(temp * 125 / target);
    if (progress < minProgress)
        progress = minProgress;
    else
        minProgress = progress;
    
    lcd_info_screen(lcd_menu_material_main, cancelMaterialInsert);
    lcd_lib_draw_stringP(3, 10, PSTR("Heating printhead for"));
    lcd_lib_draw_stringP(3, 20, PSTR("material insertion"));

    lcd_progressbar(progress);
    
    lcd_lib_update_screen();
}
static void lcd_menu_change_material_preheat()
{
#ifdef USE_CHANGE_TEMPERATURE
    setTargetHotend(material[active_extruder].change_temperature, active_extruder);
#else
    setTargetHotend(material[active_extruder].temperature, active_extruder);
#endif
    int16_t temp = degHotend(active_extruder) - 20;
    int16_t target = degTargetHotend(active_extruder) - 20;
    if (temp < 0) temp = 0;
    if (temp > target - 5 && temp < target + 5)
    {
        if ((signed long)(millis() - preheat_end_time) > 0)
        {
            set_extrude_min_temp(0);
            
            plan_set_e_position(0);
            plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], 20.0 / volume_to_filament_length[active_extruder], retract_feedrate/60.0, active_extruder);

            float old_max_feedrate_e = max_feedrate[E_AXIS];
            float old_retract_acceleration = retract_acceleration;
            max_feedrate[E_AXIS] = FILAMENT_REVERSAL_SPEED;
            retract_acceleration = FILAMENT_LONG_MOVE_ACCELERATION;

            plan_set_e_position(0);
            plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], -1.0 / volume_to_filament_length[active_extruder], FILAMENT_REVERSAL_SPEED, active_extruder);
            plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], -FILAMENT_REVERSAL_LENGTH / volume_to_filament_length[active_extruder], FILAMENT_REVERSAL_SPEED, active_extruder);

            max_feedrate[E_AXIS] = old_max_feedrate_e;
            retract_acceleration = old_retract_acceleration;

            currentMenu = lcd_menu_change_material_remove;
            temp = target;
        }
    }
    else
    {
#ifdef USE_CHANGE_TEMPERATURE
        preheat_end_time = millis() + (unsigned long)material[active_extruder].change_preheat_wait_time * 1000L;
#else
        preheat_end_time = millis();
#endif
    }

    uint8_t progress = uint8_t(temp * 125 / target);
    if (progress < minProgress)
        progress = minProgress;
    else
        minProgress = progress;

    lcd_info_screen(post_change_material_menu, cancelMaterialInsert);
    lcd_lib_draw_stringP(3, 10, PSTR("Heating printhead"));
    lcd_lib_draw_stringP(3, 20, PSTR("for material removal"));
    
    lcd_progressbar(progress);

    lcd_lib_update_screen();
}
static void lcd_menu_change_material_preheat()
{
    run_history = true;
    setTargetHotend(material[active_extruder].temperature, active_extruder);
    int16_t temp = degHotend(active_extruder) - 20;
    int16_t target = degTargetHotend(active_extruder) - 20 - 10;
    if (temp < 0) temp = 0;
    if (temp > target && !is_command_queued())
        {
            set_extrude_min_temp(0);
            for(uint8_t e=0; e<EXTRUDERS; e++)
                volume_to_filament_length[e] = 1.0;//Set the extrusion to 1mm per given value, so we can move the filament a set distance.

            plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], 20.0, retract_feedrate/60.0, active_extruder);

            float old_max_feedrate_e = max_feedrate[E_AXIS];
            float old_retract_acceleration = retract_acceleration;
            max_feedrate[E_AXIS] = FILAMENT_REVERSAL_SPEED;
            retract_acceleration = FILAMENT_LONG_MOVE_ACCELERATION;

            current_position[E_AXIS] = 0;
            plan_set_e_position(current_position[E_AXIS]);
            plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], -1.0, FILAMENT_REVERSAL_SPEED, active_extruder);
            for(uint8_t n=0; n<6; n++)
                plan_buffer_line(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], (n+1)*-FILAMENT_REVERSAL_LENGTH/6, FILAMENT_REVERSAL_SPEED, active_extruder);

            max_feedrate[E_AXIS] = old_max_feedrate_e;
            retract_acceleration = old_retract_acceleration;

            currentMenu = lcd_menu_change_material_remove;
            temp = target;
        }

    uint8_t progress = uint8_t(temp * 125 / target);
    if (progress < minProgress)
        progress = minProgress;
    else
        minProgress = progress;

    lcd_info_screen(lcd_menu_material_main, cancelMaterialInsert);
    lcd_lib_draw_stringP(3, 0, PSTR("Heating printhead"));
    lcd_lib_draw_stringP(3, 10, PSTR("for material removal"));

    char buffer[20];
    memset (buffer,0,sizeof(buffer));


    char* c;

    c = int_to_string(temp, buffer/*, PSTR( DEGREE_C_SYMBOL )*/);
    *c++ = TEMPERATURE_SEPARATOR;
    c = int_to_string(target, c, PSTR( DEGREE_C_SYMBOL ));
    lcd_lib_draw_string_center(20, buffer);

    lcd_progressbar(progress);
    LED_HEAT();
    lcd_lib_update_screen();
}
static void cancelMaterialInsert()
{
    set_extrude_min_temp(EXTRUDE_MINTEMP);
    digipot_current(2, motor_current_setting[2]);//Set E motor power to default.
}