1. Got a question or need help troubleshooting? Post to the troubleshooting forum or Search the forums!

Replacing the Filament Sensor on a C2

Discussion in 'Projects' started by tkoco, Dec 8, 2019.

  1. tkoco

    tkoco - -.- --- -.-. ---
    Staff Member

    Joined:
    May 7, 2018
    Messages:
    408
    Likes Received:
    168
    After running a very rough filament through the C2, the filament sensor failed. I ordered a replacement sensor from https://www.partsbuilt.com/
    Since there is not official procedure available from Robo, I started this project.

    The sensor cover is secured to the back plastic cover by 2 screws. The back cover is secured to the frame by 4 machine screws and interlocks with the top cover. The sensor itself is secured to the sensor cover by an insulated screw. This being said, here are the steps:

    Step 1:

    You will need to remove the saddle ( via the snap-in front cover ). Use the motor control to raise the platform.

    Saddle_removed.jpg

    Step 2:

    Power down the C2 printer ( via the Utilities -> System -> Shutdown function ). Then remove the cover from the extruder and un-cable the flat ribbon cable plus the 2 wire connector. Also, remove Teflon feed tube as well as the print bed as it can get in the way.

    Extruder_platform_removed.jpg

    Step 3:

    Remove the 2 screws ( #2 Philips ) from the top cover. You will have to look up into the printer to see these screws. The following image shows the underside of the top cover and the positions of the screws. Once you remove the 2 screws, the top cover can be gently unsnapped from the printer frame and lifted off. ( Hint: to unsnap the top cover, press one or more tabs toward the outside. Once a corner gets loose, the rest will be easier. )

    top_cover_underside.jpg

    Step 4:

    If you have not done so yet, remove the filament reel support from the back of the printer. The back cover is held in by 4 screws ( #2 Philips ). See the next two images - next posting

     
    #1 tkoco, Dec 8, 2019
    Last edited: Dec 8, 2019
  2. tkoco

    tkoco - -.- --- -.-. ---
    Staff Member

    Joined:
    May 7, 2018
    Messages:
    408
    Likes Received:
    168
    top_screws.jpg Bottom_Screws.jpg

    Step 5:

    Gently lift the back cover and pull it away from the frame.

    back_cover_unmounted.jpg

    Step 6:

    And of course, remove the 2 screws ( #1 Philips ) holding the filament sensor cover.

    Sensor.jpg

    Next posting!
     
    mark tomlinson likes this.
  3. tkoco

    tkoco - -.- --- -.-. ---
    Staff Member

    Joined:
    May 7, 2018
    Messages:
    408
    Likes Received:
    168
    Caution: Pay attention to the position of the sensor to the cover!

    I had to redo the sensor because I did not pay attention and mounted the new sensor on the wrong side. Oh Joy!

    Reverse the steps and put your C2 printer back together! Mission accomplished! As you work with the back plastic cover, make sure the cover is 100% seated. The screw holes will not line up if the cover is not seated properly. Also, put in the bottom screws first.

    The old sensor lost the actuator which is pressed when a filament is inserted.

    bad_sensor.jpg
     
    mark tomlinson likes this.

Share This Page