Klipper Configuration

ALPS Sample Configuration Files

Reference Configuration Using Motherboard UART Port (PA9, PA10)

• Use motherboard UART (PA9, PA10) port
• Reference configuration

  [output_pin _probe_ready]
  pin: PA9 #En #Enable pin
  shutdown_value: 0
  value:0
  
  [probe]
  pin: ^PA10 #out #Probe pin
  x_offset: 0                  # X-axis - sensor offset relative to nozzle
  y_offset: 0                  # Y-axis - sensor offset relative to nozzle
  z_offset:0                   # Z-axis - sensor offset relative to nozzle
  speed: 8                     # Leveling speed
  samples: 3                   # Number of samples
  samples_result: median       # Value selection method (default: median)
  sample_retract_dist: 2       # Retraction distance for leveling
  samples_tolerance: 0.05      # Sample tolerance (note that excessively small values may increase sampling times)
  samples_tolerance_retries: 3 # Retry count when exceeding tolerance
  activate_gcode:
          G4 P500
          SET_PIN PIN=_probe_ready VALUE=1
  deactivate_gcode:
          SET_PIN PIN=_probe_ready VALUE=0  

Using BL-Touch Port

• Reference configuration for using BL-Touch port
• The configuration for other motherboards is similar

  [output_pin _probe_ready]
  pin: SHT36:gpio24
  shutdown_value: 0
  value:0
  
  [probe]
  pin: ^SHT36:gpio22
  x_offset: 0                  # X-axis - sensor offset relative to nozzle
  y_offset: 0                  # Y-axis - sensor offset relative to nozzle
  z_offset:0                   # Z-axis - sensor offset relative to nozzle
  speed: 8                     # Leveling speed
  samples: 3                   # Number of samples
  samples_result: median       # Value selection method (default: median)
  sample_retract_dist: 2       # Retraction distance for leveling
  samples_tolerance: 0.05      # Sample tolerance (note that excessively small values may increase sampling times)
  samples_tolerance_retries: 3 # Retry count when exceeding tolerance
  activate_gcode:
          G4 P500
          SET_PIN PIN=_probe_ready VALUE=1
  deactivate_gcode:
          SET_PIN PIN=_probe_ready VALUE=0  

Using Limit Switch Port

• Reference configuration for using limit switch port
• The configuration for other motherboards is similar

  [output_pin _probe_ready]
  pin: SHT36:gpio20
  shutdown_value: 0
  value:0
  
  [probe]
  pin: ^SHT36:gpio16
  x_offset: 0                  # X-axis - sensor offset relative to nozzle
  y_offset: 0                  # Y-axis - sensor offset relative to nozzle
  z_offset:0                   # Z-axis - sensor offset relative to nozzle
  speed: 8                     # Leveling speed
  samples: 3                   # Number of samples
  samples_result: median       # Value selection method (default: median)
  sample_retract_dist: 2       # Retraction distance for leveling
  samples_tolerance: 0.05      # Sample tolerance (note that excessively small values may increase sampling times)
  samples_tolerance_retries: 3 # Retry count when exceeding tolerance
  activate_gcode:
          G4 P500
          SET_PIN PIN=_probe_ready VALUE=1
  deactivate_gcode:
          SET_PIN PIN=_probe_ready VALUE=0  

Homing Reference Configuration

The following is the recommended configuration file content. Please adjust according to actual needs:

tip

• If you need to use the ALPS pressure module as a Z-axis limit switch, please refer to the configuration below

[stepper_z]
endstop_pin: probe:z_virtual_endstop
# position_endstop: -0.5  

tip

• ALPS pressure module reference configuration

[homing_override]
axes: xyz
set_position_z: 10
gcode:
    {% set home_all = 'X' not in params and 'Y' not in params and 'Z' not in params %}
    {% set e_target = printer.extruder.target %} # Save current temperature
    {% set fan_speed = printer.fan.speed %}      # Save current fan speed
    
    {% if home_all or 'X' in params %}
        G28 X
    {% endif %}

    {% if home_all or 'Y' in params %}
        G28 Y
    {% endif %}

    {% if home_all or 'Z' in params %}
        G0 X{printer.toolhead.axis_maximum.x / 2} Y{printer.toolhead.axis_maximum.y / 2} F6000
        {% if e_target >= 150 or printer.extruder.temperature >= 150 %}
            M106 S255 # Turn on fan
            M109 S150 # Ensure Z homing at 150°C
        {% endif %}
        M106 S0       # Turn off fan

        G91
        G1 Z5 F2000 # Prevent nozzle from being too close to the heated bed by lifting it in advance
        G90

        # Un-comment the following line if using both eddy and pressure sensor
        #SET_PIN PIN=_probe_ready VALUE=1 
        G28 Z 
        #SET_PIN PIN=_probe_ready VALUE=0
        G1 Z10 F2000
        
        M109 S{e_target}  # Restore temperature
        M106 S{fan_speed} # Restore fan speed
    {% endif %}