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Discussion in 'Troubleshooting' started by tesseract, Oct 21, 2013.

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  1. tesseract

    tesseract Moderator
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    The bed is secured to the rails below via small standoff posts and a screw sometimes going down from the top or up from the bottom. This recommendation id more for the up from the bottom variety.

    Currently those setups use a screw with a head that just fits inside the lower rail and sometimes it does not get seated properly in there when it does things tend to be fine but when it doesn't it can eventually pop into the correct position and then make the entire standoff become loose and this can affect your prints by allowing the beds to slip back and forth just a bit but that is usually all it takes to mess things up.

    The solution is simple in its workings but not so in the impelmentation and but you will lose about 2-3mm in height of your build area.

    The solution is to simply place a nut and washer on the screw before placing the standoff on the screw.
    By tightening down the the screw to the rail itself literally makes the screw become an unmoving stud
    which works much better then the stand off can be put on and the bed and finally the nut on top and things will be much more secure.

    And now a word from our sponsor.
    I have to throw this in because what you are doing is some work and now would be the best time to implement it and it gives a great benefit.

    The stud is a great fix it will work very very well.
    BUT
    Currently the bed has no real way of adjusting the corners for height so the bed can not truly be adjusted for levelness because the standoffs are a fixed length.

    -----------------------------------
    CAVEAT: It currently only works for beds that have the nuts coming up from the bottom and secured on the top of the bed.
    -----------------------------------

    My mod is the bed leveler and it simply two pieces that slide into or onto each other with a heavy duty strong spring inside it has a hole for the screw to pass through and when it is used to replace the current standoff the bed the rests on a thing that can be adjusted for height giving you that flexibility and believe me it is worth it to get the bed as level as possible.

    Taking the bed off is probably not the most fun and that is why I am mentioning this at this point you can do two mods at the same time and be a lot better off

    The good part is that by following virtually the same procedure as above you don't lose anything at all because in this process you put the screw through the rail then the bottom hollow piece of the slider THEN the washer and nut and you lock that down the same way so the stud now has the bottom piece included then you simply put the spring in , then the top piece and then the bed and nut, not much different.

    Now if you press down on the bed it will move downward allowing for easy adjustment of the locking nut. If you need that corner lower press down on the bed and tighten the nut and the bed will not come back up as far or if you need it higher you can press down on the bed and loosen the nut and the bed will come back higher than before because of the strong spring (it is capable of holding up 35 pounds if I am not mistaken so it has plenty of strength). The mod can be found here on thingverse.

    http://www.thingiverse.com/thing:125626

    the bed leveler in action
    robobedleveler.jpg robobedleveler1.jpg robobedleveler5.jpg
    Compressed a bit so bed corner would be lower



    robobedleveler6.jpg
    Allowed to be higher lifting the corner.



    The spring is the real crucial thing so here is the link to it at Mcmaster Carr

    http://www.mcmaster.com/#94125k633/=p19bik


    Regardless if you use the mod or not just make sure the screw used to connect to the rail is nice and secure it is the best place to start.

    Good luck
     
    6 people like this.
  2. Harry

    Harry Team ROBO 3D
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