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1500mm Screw Whip Solved??

Discussion in 'General Talk' started by GrayUK, May 13, 2018.

  1. GrayUK

    GrayUK Openbuilds Team Elder
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    This is new to me, but maybe not to others. We find that longer screws are inclined to generate whip when being asked to drive at higher speeds, but take a look at this.

    Long Travel vs High Speed: Part 2

    I'm pretty sure we can throw this idea out there, and someone can come back with a cheaper but reliable design we could use.
    I really haven't given it much thought, from a practical point of view, but I like the idea!
    Any suggestions??
     
    Mark Carew likes this.
  2. Rick 2.0

    Rick 2.0 OpenBuilds Team
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    Actually fairly simple. Can't really do it with TR8x8 screws due to the lack of decent AB nuts but to drill out a standard pulley, mount a dumpstercnc flanged AB lead nut inside and wedge the whole assembly between a couple thrust bearings would really not be that difficult. As far as reliability, that'll all come down to testing.
     
    Mark Carew likes this.
  3. JustinTime

    JustinTime Journeyman
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    The hollow shaft is a great idea. You could make the lead screw almost any length and have no whip.
     
  4. Gary Caruso

    Gary Caruso OpenBuilds Team
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    I like it, can do it with something like this... i can't find any with TR8*8, this one is 10x10mm which would be good too
    Non-captive stepper
     
  5. GrayUK

    GrayUK Openbuilds Team Elder
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    Yeah, I'd forgotten about those. Could easily strap it under the moving bed on the Y Axis:D
    1500 Y axis sorted :thumbsup::thumbsup:
     

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