Welcome to Our Community

Some features disabled for guests. Register Today.

How to calculate V-Slot® deflection V2

How to Estimate Deflection in Your Open Builds Projects

  1. Giarc

    Giarc OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

    Joined:
    Jan 24, 2015
    Messages:
    2,248
    Likes Received:
    1,208
    I was thinking the same thing. I would also be interested in seeing the FEA breakdowns you mentioned.
     
  2. 997.1

    997.1 New
    Builder

    Joined:
    Jun 28, 2014
    Messages:
    2
    Likes Received:
    1
    I took this down from the site as there is a thin line between a good assumption and a poor one. The original formulas and values I posted were experimentally verified on an OX build (yes there is a moment on the plate and does contribute) on the 20x60 and 20x20. Deflection measured center beam no integration done to check other areas, simplest case possible. Various (non calibrated) weights were used to confirm results. The original discussion came from guys mounting 2.2kW spindles on a 1000mm length double 20x60 (OX "X" gantry). I did not run FEA. The discussion seen above would come to me in an email about once a week.

    Glad you guys took this one over Mark! :):):)
     
    Mark Carew likes this.
  3. Roger Hughes

    Builder

    Joined:
    Feb 13, 2020
    Messages:
    4
    Likes Received:
    0
    I want to use the C Beam vertically. Is there a resource to calculate deflection fo fit in the vertical orientation? I am building a 96" long router table 48" wide - Can put as many "legs" on it as needed to prevent deflection but prefer as few as possible. The router motor is a 14 lb Porter Cable router
     
  4. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
    Staff Member Moderator Project Maker Builder Resident Builder

    Joined:
    Mar 1, 2017
    Messages:
    8,110
    Likes Received:
    2,675
    Unfortunately no calculator available for that sorry.

    If I understand your use case correct, I'd estimate 2 legs would be plenty to lift the Porter Cable and still constrain it well enough in the two other directions.
     
    Mark Carew likes this.

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice