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Unresolved Robo3D and Cura

Discussion in 'Troubleshooting' started by dbvanhorn, Feb 20, 2015.

  1. dbvanhorn

    dbvanhorn Active Member

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    I have switched from matter control to Cura.
    I was directed to a thread here that showed nominal settings, and I implemented all of that.
    The print quality is pretty bad. Outer wall is failing to print in some places, it's not sealing over the top of the infill, and there's a generally "crumby" appearance, as in lots of bits of plastic where they shouldn't be.

    I'm very confused. I slowed down to 30mm/sec and reduced feed to 90% and still about the same results.
    I'm printing with Inland PLA.

    Any suggestions?
     
  2. Mike Kelly

    Mike Kelly Volunteer

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    Whats your top layer thickness and layer height? Generally a top fill of 1.2mm is a good point to use.
     
  3. dbvanhorn

    dbvanhorn Active Member

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    Bottom/Top thickness was set to 0.8mm in Basic Shell at 0.8
     
  4. Robert Choban

    Robert Choban Active Member

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    What version of Cura are you using
     
  5. dbvanhorn

    dbvanhorn Active Member

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    Interesting.. Help About doesn't show the version number, but the updater assures me it's the latest version.

    I see it now 15.02.1
     
  6. Mike Kelly

    Mike Kelly Volunteer

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  7. dbvanhorn

    dbvanhorn Active Member

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  8. Mike Kelly

    Mike Kelly Volunteer

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    You should probably season the nozzle I gave you with some canola oil or avocado oil
     
  9. dbvanhorn

    dbvanhorn Active Member

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    Here's what I'm trying to print:

    The middle part is 1" OD Base flange is 3mm high. None of the top surfaces are there. The sides of the bottom flange look good, the sides of the middle are horrible in every direction, and the sides of the top are equally bad.
     

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  10. Mike Kelly

    Mike Kelly Volunteer

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    Picture of the print?

    Edit: Also try running the part through netfabb basic using the repair tool.
     
  11. dbvanhorn

    dbvanhorn Active Member

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    I did season with canola. :)
     
  12. dbvanhorn

    dbvanhorn Active Member

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    WARNING: There are some things that can't be Un-Seen
     

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  13. dbvanhorn

    dbvanhorn Active Member

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    Looking at it now in Netfabb.. Nothing seems out of place.
     
  14. dbvanhorn

    dbvanhorn Active Member

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    Here's the Scad file that generated the part.
     

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  15. Mike Kelly

    Mike Kelly Volunteer

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    This is one of the drawbacks of cheap filament. Try printing at a higher temperature and increasing shell width and top/bottom layers

    Also maybe try cleaning any gunk on your hobbed bolt.
     
  16. dbvanhorn

    dbvanhorn Active Member

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    I've used this spool before, and had much better results. :(

    I checked the hobbed bolt, nothing in there. When I change spools I check. It looks like too much extrusion, extra material bunching up.
    I'm already at 90% flow. I'm at 200C and 75 bed. If I lower the bed much, I get bad warping and part of the base curls up. If I try to print at 190, apparently the robo firmware prevents extrusion. Running another part now, about 1MM built up so far, and it's looking ok.
     
  17. Mike Kelly

    Mike Kelly Volunteer

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    Try 210 or 220. Also it's a good idea to store your filament in an airtight container with a desiccant when not in use.
     
  18. dbvanhorn

    dbvanhorn Active Member

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    I had been running at 210, per guidance on the spool and several web sites. Many people advise using the lowest practical extrusion temp.

    I will try 210 and 220, and see what happens.

    thanks
     
  19. jbigler1986

    jbigler1986 Active Member

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    Most people say to go between 190 and 210. My PLA sucks at anything below 230. 230 prints beautifully on my ROBO with the PLA I'm using (it is a cheap brand of PLA). So it always varies depending on lots of variables. Just keep upping the temp until you are satisfied.
     
  20. dbvanhorn

    dbvanhorn Active Member

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    This is the blue spool that came with the machine. I've done better with it in the past.. Working on settings now.
    It seems that Cura is very generous on feed.. ? I have a print running now at 80% flow that is looking pretty good.
    The dimensions of the parts seem off as well, about 90% of normal Something's not right.
     

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