Filament Sensor Case & Setup Info/Settings

cults3d

There's very little information online about how to wire a filament runout sensor properly on compound motherboards, as schematics are scarce or outdated and often lack the specific data you're seeking. So I'm hoping to simplify this process for you. This guide is geared towards motherboards like my OSOYOO MKS Base v1.5 board and my Hictop red MPX .3, which use regular end-stop micro-switches. To accomplish this, you'll need the following hardware: Endstop microswitch with pigtail connector Four 3mm x 1.5mm magnets M3 x 5mm screw M3 Nut On the software side of things, this applies specifically to Marlin, particularly the latest version as of December 25th, 2017 (v1.1.8), and is also compatible with the latest bugfix. To set up a filament runout sensor, three changes need to be made: 1. Enable the filament runout sensor on Config.h 2. Enable advanced pause and adjust values according to your machine's requirements 3. Ensure the correct pin is used by the firmware Change 1: Enabling Filament Runout Sensor Edit configuration.h and enable the filament runout sensor by scrolling down to the setting. It should look something like this: #define FILAMENT_RUNOUT_SENSOR #if ENABLED(FILAMENT_RUNOUT_SENSOR) #define FIL_RUNOUT_INVERTING true // Set to true to invert the logic of the sensor. Set to true for the red mechanical end-stops #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined. #define FILAMENT_RUNOUT_SCRIPT "M600" #endif Change 2: Enabling Advanced Pause Feature Edit configuration_adv.h and enable the advanced pause feature. This includes setting your machine's specific values, which you can adjust as needed. #define ADVANCED_PAUSE_FEATURE #if ENABLED(ADVANCED_PAUSE_FEATURE) #define PAUSE_PARK_X_POS 3 // X position of hotend #define PAUSE_PARK_Y_POS 3 // Y position of hotend #define PAUSE_PARK_Z_ADD 3 // Z addition of hotend (lift) #define PAUSE_PARK_XY_FEEDRATE 100 // X and Y axes feedrate in mm/s (also used for delta printers Z axis) #define PAUSE_PARK_NOZZLE_TIMEOUT 900 // Turn off nozzle if user doesn't change filament within this time limit in seconds #define FILAMENT_CHANGE_NUMBER_OF_ALERT_BEEPS 5 // Number of alert beeps before printer goes quiet #endif Change 3: Using the Correct Pin on Motherboard Scroll down to the relevant code and update the value to match the pin you're using. In my case, I used D11 for both my OSOYOO MKS Base v1.5 and Hictop red MPX .3 boards. // Define digital pin 4 for the filament runout sensor. Use the RAMPS 1.4 digital input 4 on the servos connector #define FIL_RUNOUT_PIN 11 // Stock setting was 4. Changed to 11 for pin D11 on the motherboard. This setup works even when using Octoprint.