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Solved Robo C2 print bed leveling issue

Discussion in 'Troubleshooting' started by Brian Guenther, Jun 18, 2018.

  1. Brian Guenther

    Brian Guenther New Member

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    So I am very new to 3D printing and the Robo C2 is my first printer.

    I used the printer for about 3 days without major issue. Then I had my first print failure. The nozzle got all gooped upand knocked the print off the bed and made a big mess. So of course I cleaned it up. This is when my issues began.

    So I cleaned everything, retaped the bed. and went to do the Z-offset wizard to make sure it was still good. Leveled it and went to do the Z-offset fine tune. When I went to run a test line, the nozzle drilled into the print bed and scratched a huge gash in the bed, then moved outward to extrude filament in a nice line. I tried to level it again and his happened again. After several frustrating hours of scratching up my print bed, I called support. The escalated me, support folks are super nice. He emails me to run M119 in my console and it comes back normal.

    Then he tells me my leveling problems are from the bed being likely bent downwards and to just take the bed and haul it up. So, I did. After a few more odd leveling sessions, I managed to get the filament to come out relatively normal without coming too close to the bed and not come out wavy.

    This morning, after a successful print, I cleaned the print bed and replaced it to print again, this time from the console on the computer(up to this point I have been exclusively using the usb and the robo app) and first everything I was printing was insisting on printing at 235C. Everything I have printed up to now has print at most 210C. So I thought that was odd. So I manually set the temperature, which I haven't had to do before now.

    So now when I went to print and nothing would stick to the bed. It would come out super stringy and awful not laying down at all. So I thought the nozzle must be too far away, naturally I went to my z-offset and tweeked it. however, now I am having interesting results and I am not sure how to proceed.

    The lines that come out are too close to the bed when they start, then they get wavy and stringy in the middle, then they end fairly close to correct. I'm attaching the picture I took of the test lines I ran. IMG_4887.JPG

    I am afraid to adjust it in any way because of my fear of causing even more damage to my print bed. and I don't know how to proceed.

    Sorry for rambling, I just wanted to be as descriptive as possible.

    Any help would be greatly appreciated.

    Thank you!
    Brian
     
  2. Brian Guenther

    Brian Guenther New Member

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    Oh shoot, I am in the wrong troubleshooting area.

    I'm sorry, could this be moved to the C2 troubleshooting page?
     
  3. Geof

    Geof Volunteer Moderator
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    Moved for you
     
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  4. Geof

    Geof Volunteer Moderator
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    First thing I'd look at is going back to USB. The 235 sounds like ABS was selected as the material. Swap back to PLA to be sure (on the menu and in the slicer)
     
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  5. Geof

    Geof Volunteer Moderator
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    Next send (through octoprint website) an M502 and M500 then re run the home offset and try again. The M502 clears "memory" the M500 saves the clear.
     
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  6. Brian Guenther

    Brian Guenther New Member

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    So I did everything you said and ran a "bed level test" print job that came on the printer.

    The result is this: IMG_4888 (1).JPG

    Thank you for your quick responses to help. I very much appreciate it.

    Brian
     
  7. Geof

    Geof Volunteer Moderator
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    interesting results. Will you take a picture of the underside of the bed please? Make sure all 4 magnets are in place .
     
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  8. Brian Guenther

    Brian Guenther New Member

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    I'm not sure which underside(I don't know which one has the magnets) you wanted so I took pictures of both: IMG_4889.JPG IMG_4890.JPG
     
  9. Geof

    Geof Volunteer Moderator
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    Ok so everything is in place. What you can do is manually level the bed by adding shims under the cone shaped nuts (not the removable bed portion) so the left side gets raised up. Then reset your home offset.
     
  10. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    You can practice if you want by adding small strip of blue tap on top of the posts the bed sits on until it is level (i.e. even on both sides).
    That gives you a really good idea how much you need to shim :)
     
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  11. Brian Guenther

    Brian Guenther New Member

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    So, forgive me, but what is a shim?
     
  12. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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  13. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    You can use anything to shim with really, tape, paper, metal.

    shim
    SHim/
    noun
    1. 1.
      a washer or thin strip of material used to align parts, make them fit, or reduce wear.
    verb
    1. 1.
      wedge (something) or fill up (a space) with a shim.
     
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  14. Brian Guenther

    Brian Guenther New Member

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    Thanks so much. Let me get to work trying to get it level.

    I'll report back if I have any issues or its resolved.

    Thanks again!
     
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  15. Geof

    Geof Volunteer Moderator
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    Good luck! Go slow, take your time and you'll get it no problem.
     
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  16. Brian Guenther

    Brian Guenther New Member

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    So after meticulously adding tape pieces to the pegs for a couple hours. The printer is printing acceptably now.

    I am going to watch it for a while and play with it by adding pressure and such to see if I can get it stable as it just feels kinda precarious at the moment.

    Thanks again for the fast help!
    Y'all are awesome!
     
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  17. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Tape is the quick and easy (easier) way. If you get adventurous measure the thickness on each and then add an appropriately sized shim. I just left the tape personally :)
     
  18. EvanC2

    EvanC2 New Member

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    Interesting side note for anyone else with a C2 who ends up here.

    I was once going crazy trying to figure out why my bed wasn't leveling. Nothing worked. And when it did work, it changed. Come to find out those magnetic washers can come off and one had attached itself to something else inside the printer. :)
     
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  19. Geof

    Geof Volunteer Moderator
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    Sometimes it’s the simple things that can be the sneakiest and drive us bonkers. Good catch ! Keep us posted on your other issues when you can
     

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