Welcome to Our Community

Some features disabled for guests. Register Today.

Gear Rack or Ball Screws?

Discussion in 'General Talk' started by Josh Mascote, Aug 4, 2014.

  1. Josh Mascote

    Josh Mascote Journeyman
    Builder

    Joined:
    Jan 30, 2014
    Messages:
    32
    Likes Received:
    5
  2. Tweakie

    Tweakie OpenBuilds Team
    Staff Member Moderator Builder

    Joined:
    Jan 18, 2014
    Messages:
    785
    Likes Received:
    298
    It's all bit of a trade-off between one parameter and another. My preference is for ball-screws but, dependant on screw pitch, axis rapid travel can be quite slow if driving with stepper motors on a large machine.

    Just as an example; my ball-screw pitch is 5mm and they are direct driven with stepper motors - my maximum 100% reliable rapids are 4,500mm/min which equates to 900 rpm from the steppers. This is just fine for my machine table size but it would perhaps not suite a machine with a table size of 2,500mm x 1,250mm where rack and pinion systems are often employed.

    Tweakie.
     
  3. Josh Mascote

    Josh Mascote Journeyman
    Builder

    Joined:
    Jan 30, 2014
    Messages:
    32
    Likes Received:
    5
    Hmm....interesting. I was planning on making my machine 1500mm x 750mm perhaps it wouldn't be too bad.
     

Share This Page