Bed ground screw

Discussion in 'Motion System' started by orcinus, Aug 22, 2019.

  1. orcinus

    orcinus Well-Known Member

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    Before you install the glass plate, check your bed ground screw isn’t protruding through the top surface of the bed slightly. That will bend or at the very least skew the glass bed.
     
  2. orcinus

    orcinus Well-Known Member

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    Also, check your cantilever screws.
    Not the ones that hold the bed bracket, but the ones that screw into the linear slide.

    Mine were loose and the whole thing was rocking if pressed a bit harder.

    Took me a while to figure out why i was getting a different result every bed compensation run.
     
    #2 orcinus, Aug 22, 2019
    Last edited: Aug 22, 2019
  3. mhe

    mhe Well-Known Member

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    The build manual also states to use an M4 screw when in fact you need an M3 iirc.
     
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  4. Greg_The_Maker

    Greg_The_Maker Administrator
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    How many of the screws were loose? Do you think they had vibrated tight or had not been done up in the first place?
     
  5. Spoon Unit

    Spoon Unit Well-Known Member

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    Good point. I couldn't locate the right screw for that amongst everything. What I did use was too long, so I just added more spare washers until it was no longer protruding.
     
  6. blarbles

    blarbles Well-Known Member

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    This is what I did as well.
     
  7. orcinus

    orcinus Well-Known Member

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    All four of them.
    It’s possible it was due to vibration i guess, as the Z axis is pretty "buzzy”, but they also seemed fairly consistently loosened.
    I haven’t applied any threadlock to them, so we’ll see if they loosen up again or not.

    Yeah, that screw was missing. I had an M3x5mm in one of my drawers and used that, but even that protruded slightly, so i had to add a third washer.
     
  8. Krayn

    Krayn Well-Known Member

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    Oh good, I wasn't crazy thinking that screw was missing. I spent a few hours looking for a screw I might have dropped or misplaced. I ended up finding an extra screw from another printer's spare parts.
     
  9. Amr

    Amr Well-Known Member

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    It was not missing in my kit :)
     
  10. mhe

    mhe Well-Known Member

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    I had one T-nut missing, so I think people make mistakes, but it isn't a big deal.
     
  11. Nibbels

    Nibbels Well-Known Member

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    Yeah kind of the same problem here. Until I know better I have a spare M4 which looks like the M3 needed for connecting the beds ground.
    I gave up searching and installed another one.
     

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