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Message ID: 16370     Entry time: Fri Oct 1 12:12:54 2021
Author: Stephen 
Type: Update 
Category: BHD 
Subject: ITMY (3002) CAD layout pushed to Box 

Koji requested current state of BHD 3D model. I pushed this to Box after adding the additional SOSs and creating an EASM representation (also posted, Attachment 1). I also post the PDF used to dimension this model (Attachment 2). This process raised some points that I'll jot down here:

1) Because the 40m CAD files are not 100% confirmed to be clean of any student license efforts, we cannot post these files to the PDM Vault or transmit them this way. When working on BHD layout efforts, these assemblies which integrate new design work therefore must be checked for most current revisions of vault-managed files - this Frankenstein approach is not ideal but can be managed for this effort. 

2) Because the current files reflect the 40m as built state (as far as I can tell), I shared the files in a zip directory without increasing the revisions. It is unclear whether revision control is adequate to separate [current 40m state as reflected in CAD] from [planned 40m state after BHD upgrade]. Typically a CAD user would trust that we could find the version N assembly referenced in the drawing from year Y, so we wouldn't hesitate to create future design work in a version N+1 assembly file pending a current drawing. However, this form of revision control is not implemented. Perhaps we want to use configurations to separate design states (in other words, create a parallel model of every changed component, without creating paralle files - these configurations can be selected internal to the assembly without a need to replace files)? Or more simply (and perhaps more tenuously), we could snapshot the Box revisions and create a DCC page which notes the point of departure for BHD efforts?

Anyway, the cold hard facts:

 - Box location: 40m/40m_cad_models/Solidworks_40m (LINK)

 - Filenames: 3002.zip and 3002 20211001 ITMY BHD for Koji presentation images.easm (healthy disregard for concerns about spaces in filenames)

Attachment 1: 3002_20211001_ITMY_BHD_for_Koji_presentation_images.easm  4.641 MB  Uploaded Fri Oct 1 13:30:25 2021
Attachment 2: 40m_upgrade_layout_20200611-ITMY_Beam_Dim.pdf  1.100 MB  Uploaded Fri Oct 1 13:32:54 2021  | Hide | Hide all
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