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yet another! crit thread.

Discussion in 'Troubleshooting' started by collin, Nov 7, 2014.

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  1. collin

    collin New Member

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    Take a looksy ive got my printer back in order pretty close to what i want but these new defects are popping up out of the blue and pretty consistently take a look. IMG_20141107_193336468_HDR.jpg IMG_20141107_193346026.jpg
     
    #1 collin, Nov 7, 2014
  2. Printed Solid

    Printed Solid Volunteer Admin
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    Do you get the same issue with other colors?
     
    #2 Printed Solid, Nov 7, 2014
  3. collin

    collin New Member

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    im running a test on colorfabb black now
     
    #3 collin, Nov 7, 2014
  4. collin

    collin New Member

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    ya i ran a different piece similar shape. same weird defects. @mark tomlinson

    IMG_20141107_233248143.jpg IMG_20141107_233254142.jpg
     
    #4 collin, Nov 7, 2014
  5. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    The top layers still look insufficient and the corners look a bit messy.
    That 'corner?' right at the front of the pic looks messy. Messy corners are probably some backlash/overshoot from a slightly sloppy axis drive (X or Y). Belt may need a little tension adjusting to sort that out. In fact, looking at the inside it looks like the belt may be shifting a bit (the layers are shifting)

    The other is probably too thin of a shell.

    You can see if shifting is due to belt/drive lash by slowing it way the heck down and if it gets better...you have found the culprit.
     
    #5 mark tomlinson, Nov 8, 2014
  6. collin

    collin New Member

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    it must be my x axis. the belt is fairly loose. do the timing belts stretch over time? this on has a belt tension-er on it, however its gained back alot of slack.
     
    #6 collin, Nov 8, 2014
  7. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Yea, they will stretch a bit over time. I would not expect them to stretch a *lot* but some, sure. They probably will do more initially...
    I have had to tighten my X about 3 times over the past two years.
     
    #7 mark tomlinson, Nov 8, 2014
  8. collin

    collin New Member

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    I've had this printer for about 9-10 months now and never have i tightened my x axis. when i upgraded my y axis i did observe initial stretching and had to tighten it.

    how do you tighten it? do you have to take if of re situate it then ziptie it back together. on my y axis its as simple as tightening a screw.
     
    #8 collin, Nov 8, 2014
  9. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    and the best way I can describe the appropriate belt tension is "somewhat tighter than I thought it should be"...

    Yes, you need to cut the zip-ties. I re-arranged mine a bit (with more zipties) so that there is one sticking out that I can use to tighten it with if needed.

    If a picture helps I'll snap one.
     
    #9 mark tomlinson, Nov 8, 2014
  10. collin

    collin New Member

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    lol the is certainly a quantitative answer if ive seen one
     
    #10 collin, Nov 8, 2014
  11. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Stupid question... here is a pic.
     

    Attached Files:

    #11 mark tomlinson, Nov 8, 2014
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  12. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Yea, it is a tough question to answer since I didn't use a strain gauge or anything :)
     
    #12 mark tomlinson, Nov 8, 2014
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  13. collin

    collin New Member

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    ! brain blast! jk\

    im going to get one of these to put between my belt ends to take up slack more efficiently than the close pin method.
     
    #13 collin, Nov 8, 2014
  14. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    It gives you really fine control (one click of the ziptie is not much).
     
    #14 mark tomlinson, Nov 8, 2014
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  15. collin

    collin New Member

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    #15 collin, Nov 8, 2014
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  16. collin

    collin New Member

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    one last annoyance, do your zip ties fatigue at all?
     
    #16 collin, Nov 8, 2014
  17. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    No, they do not.

    Just pay attention to how far out (in the X axis) the zip-tie buckle goes. Too far and it will interfere with the travel at the extreme edge.
    Mine is a few mm shy of that.
     
    #17 mark tomlinson, Nov 8, 2014
  18. Galaxius

    Galaxius Well-Known Member

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    My x belt is run through the spring from a clothes peg which consistently applies tension. Do you not have that spring? Let me know if you want a pic.
     
    #18 Galaxius, Nov 10, 2014
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  19. Printed Solid

    Printed Solid Volunteer Admin
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    Yeah, but then you'd be tempted to smash your head into it when you get frustrated.
     
    #19 Printed Solid, Nov 10, 2014
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  20. collin

    collin New Member

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    So.. i have this dilemma ....
    i have slop in the x direction but when i tighten the x belt i get this. (pic below)

    the right side of my x rail wont rest on the switch it just sticks like this unless i push it down a little bit.
    whats going on guys ;'(

    @mark tomlinson just in case you dont see this

    IMG_20141110_220626692_HDR.jpg
     
    #20 collin, Nov 10, 2014
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