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Message ID: 15901     Entry time: Thu Mar 11 02:10:06 2021
Author: Koji 
Type: Summary 
Category: BHD 
Subject: BHD Platform vertical dimentions 

Stephen and I discussed the nominal heights of the BHD platform components.

  • The beam height from the stack is 5.5"
  • The platform height is 1.5" and the thickness of 0.4", according to the VOPO suspension, which we want to be compatible with.
  • Thus the beam height on the BHD platform is 4".
  • The VOPO platform has a minimum 0.1" gap from the installation surface when it is suspended.
  • When the BHD platform is fixed on the table, we'll use positioners that are fixed on the stack table. Then the BHD platform is fixed on the positioner rather than fixing the entire platform on the stack. This leaves us the option to suspend the platform in the future. The number of the positioners is TBD.
  • Looking at the head size for 1/4-20 socket head screws, It'd be nice to have the thickness of 0.5" for the positioners. This makes the thin part of the stiffener to be 0.6" in thickness.
     
  • The numbers are nominal for the initial design and subject to the change along with FEA simulations to determine the resonant frequency of the body modes.
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BHD_Platform_Vertical_Dimentions.pdf
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