SV08 connect Smart Filament Sensor

Sovol SV08
1

Hello everyone!

I’m trying to install a Smart BTT Sensor on my Sovol SV08 printer. The sensor has 3 pins: S, V, G. It’s an optical endstop with a wheel that moves along with the filament during printing. If the wheel stops moving, it means there’s a clog, and the printer should pause for cleaning.

I connected this sensor instead of the standard filament_switch_sensor filament_sensor.

Here is the code I’m using:

#[filament_switch_sensor filament_sensor]
#pause_on_runout: True
#event_delay: 3.0
#pause_delay: 0.5
#switch_pin: PE9

[filament_motion_sensor BTT_Smart_Filament_Sensor]
switch_pin: PE9
detection_length: 7.0
extruder: extruder
pause_on_runout: True
event_delay: 3.0
pause_delay: 0.5

runout_gcode:
#PAUSE # [pause_resume] is required in printer.cfg
M117 Filament encoder runout
SET_IDLE_TIMEOUT TIMEOUT=600000

insert_gcode:
M117 Filament encoder inserted

When I start a print, an error appears in the console and the printer stops with an error.

The error message is:

18:10
Error evaluating ‘gcode_macro CANCEL_PRINT:gcode’: jinja2.exceptions.UndefinedError: ‘extras.gcode_macro.GetStatusWrapper object’ has no attribute ‘filament_switch_sensor filament_sensor’
18:10
Error evaluating ‘gcode_macro START_PRINT:gcode’: jinja2.exceptions.UndefinedError: ‘extras.gcode_macro.GetStatusWrapper object’ has no attribute ‘filament_switch_sensor filament_sensor’

I think the issue is caused by some kind of macro conflict, but I don’t have enough experience to fix it.

Could someone help me with this?

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image1920×955 178 KB

2

Alright, I figured it out. This solution might not be the most correct one, but it works.

Here’s what to do:

[filament_switch_sensor filament_sensor]
pause_on_runout: True
event_delay: 3.0
pause_delay: 0.5
switch_pin: extra_mcu:PA9

[filament_motion_sensor encoder_sensor]
switch_pin: PE9
detection_length: 7.0
extruder: extruder
pause_on_runout: True
event_delay: 3.0
pause_delay: 0.5

runout_gcode:
#PAUSE # [pause_resume] is required in printer.cfg
M117 Filament encoder runout

insert_gcode:
M117 Filament encoder inserted

Now the printer thinks that extra_mcu:PA9 always has filament inserted, and it only processes pause/runout errors from PE9.

Make sure to turn off the switch shown in the screenshot.

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image405×175 27.2 KB

3

Welcome to the forum.

Your issue is the start_print macro looks for the filament sensor by the name you commented out.


[gcode_macro START_PRINT]
description: 
variable_state: 'Prepare'
variable_record_extruder_temp:0
variable_max_record_extruder_temp:0
gcode:
    {% set mesh_name = "default" %}
    {% set mesh_calibrate_temp = printer['gcode_macro _global_var'].bed_mesh_calibrate_target_temp|int %}

    {% set extruder_target_temp = printer.extruder.target|int %}

    {% set bed_targer_temp = printer.heater_bed.target|int %}

    M400

    CLEAR_PAUSE

    G90
    {% if state == 'Prepare' %}

        {action_respond_info("Prepare!")}

        {% if printer.toolhead.homed_axes|lower != "xyz" %}
            G28
        {% endif %}

        {% if printer**['filament_switch_sensor filament_sensor']**.enable == True and
              printer**['filament_switch_sensor filament_sensor'].**filament_detected != True
        %}
            M117 No filament!!!
            {action_respond_info("Please Insert filament in Sensor!")}
            CANCEL_PRINT
        {% endif %}

        {action_respond_info("Check Heating!")}

        M140 S{bed_targer_temp}
        M104 S{extruder_target_temp}

        {% if printer.heater_bed.temperature < bed_targer_temp %}
            M117 Bed heating...
            {action_respond_info("Bed heating...")}
            M190 S{bed_targer_temp}
        {% endif %}

        {% if printer.extruder.temperature < extruder_target_temp %}
            M117 Nozzle heating...
            {action_respond_info("Nozzle heating...")}
            M109 S{extruder_target_temp} 
        {% endif %}

        {% if printer.quad_gantry_level.applied|lower != 'true' %}
            QUAD_GANTRY_LEVEL
        {% endif %}
        BED_MESH_CALIBRATE ADAPTIVE=1 
        
        SET_GCODE_VARIABLE MACRO=START_PRINT VARIABLE=state VALUE='"Start"' 
        UPDATE_DELAYED_GCODE ID=_print_start_wait DURATION=0.5

    {% elif state == 'Start' %}
        M117 Printing now!!!
        {action_respond_info("Start!")}
    {% endif %}

Note under Klipper a [filament_switch_sensor]
And a [filament_motion_sensor]

Are not the same thing.

Configure the new sensor correctly. Uncomment the [‘filament_switch_sensor filament_sensor’] section and change the pin reference to an unused pin.

Add this near the top of your configuration.

[delayed_gcode startup_disable_filament_sensor]
initial_duration: 0.5
gcode:
  SET_FILAMENT_SENSOR SENSOR=filament_sensor ENABLE=0

OR search every macro for [‘filament_switch_sensor filament_sensor’] and edit it. Delete the check or point it at the new sensor. AFAIK Klipper sets the senor true at initialization. That would allow a print to start with no filament loaded but would stop when the sensor failed to toggle after 7mm of extruder moves.

4

Oops, cross posted. Glad you got it sorted.