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How to start using ACME lead screw with delrin nut block

Discussion in 'Tutorials' started by winand, Nov 4, 2014.

  1. winand

    winand Veteran
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    Today i received my materials for building my 3D printer.
    It was very well packed! - thumbs up!- (unfortunately had to pay $39 customs duty on top the $50 shipping)

    When trying the delrin nut block on the lead screw, it does fit, but it's very tight!
    By hand i can only twist the block on the screw until the screw is starting to come out on the other side.
    Then my hand starts losing grip on the screw and i can't get it any further.

    Do i have to wear the blocks in in some kind of way (run the blocks up and down using a drill), should i lubricate them right from the start? (and if so, with what?)
    Please help me out?
     
    #1 winand, Nov 4, 2014
    Last edited: Nov 4, 2014
  2. Tweakie

    Tweakie OpenBuilds Team
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    Hi Winand,

    They have been made tight and will loosen-up (bed-in) with use.
    Running them back and forward with a drill a few times (no lubrication necessary) will do the trick. ;)

    Tweakie.
     
  3. winand

    winand Veteran
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    Great, will try that!
     
  4. winand

    winand Veteran
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    D*mn, spent over 10 minutes turning the blocks back and forth over the 1 meter lead screw..
    They seem to loosen up just a tiny little bit, but i still can't turn them by hand?
    I don't want that all my stepper motors force goes into moving the block over the screw :)

    For my CNC router i used a polish stainless M10 screw with a delrin block made for it.
    That one was gliding like butter..

    Any other tips?
     
  5. Rick 2.0

    Rick 2.0 OpenBuilds Team
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    Can you provide a photo or internet link showing the style of the nut?
     
  6. dddman

    dddman Master
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    Let me guess... UPS? Just for fun, from where to where was the shipping?
     
  7. winand

    winand Veteran
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    @Rick2.0: The nut is the Openbuilds nut, the lead screw the Openbuilds lead screw.
    The nuts were ordered however at iprototype.nl a distributor of openbuilds material since the nuts were out of stock on the openbuildpartstore.

    I now have experimented with some lubrication, i used graphite lock lubricant spray.
    It's much better now! strange though that lubrication seems necessary.

    @dddman; Shipping was UPS from the USA to The Netherlands..
     
  8. Rick 2.0

    Rick 2.0 OpenBuilds Team
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    Interesting. I tend to prefer the V-Slot Acme Nut Plate as all the nut blocks I have received are so loose that if I hold them vertically, a 1m stick of TR8*8 will actually spin itself through under its own weight. It appears there are some serious quality control issued in the manufacture.
     

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