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  3 days ago by lparkin | Reply

  Update end of day 1

  What was done

  I chose 3D CAD design + prototyping as my starting point for the motor and pulley housing:

  • Did 3 iterations of the base design, need to do 1 or two more.
  • Designed and printed turntable surface and base
  • Designed and printed bushes to fit the 8mm inner-diameter bearings onto 5mm threaded rod.
  • Loaded raspberry pi OS onto my pi zero 2 WH.
    • Started experimenting with stepper motor code in Python (can currently rotate small pulley any number of degrees as input from the command line.

  What's Next?

  • Iterate once more on base design to allow about 2mm of additional space to allow easy fitting of the belt onto the pulleys.
  • Design pi + camera housing (figure out what distance from center of turntable to camera will be optimal).
  • Design structure to hold pi + camera at the desired height and angle.
  • Connect everything and start mapping the digital design parameters:
    • How many degrees on small pulley = how many degrees of rotation on turntable.
    • How many photos to take, how many stops along the way.
    • How to process the images. (on pi or off pi, on a device with more computational strength).

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Edit Comment 11565
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# Update end of day 1 ## What was done I chose 3D CAD design + prototyping as my starting point for the motor and pulley housing: * Did 3 iterations of the base design, need to do 1 or two more. * Designed and printed turntable surface and base * Designed and printed bushes to fit the 8mm inner-diameter bearings onto 5mm threaded rod. * Loaded raspberry pi OS onto my pi zero 2 WH. * Started experimenting with stepper motor code in Python (can currently rotate small pulley any number of degrees as input from the command line. ## What's Next? * Iterate once more on base design to allow about 2mm of additional space to allow easy fitting of the belt onto the pulleys. * Design pi + camera housing (figure out what distance from center of turntable to camera will be optimal). * Design structure to hold pi + camera at the desired height and angle. * Connect everything and start mapping the digital design parameters: * How many degrees on small pulley = how many degrees of rotation on turntable. * How many photos to take, how many stops along the way. * How to process the images. (on pi or off pi, on a device with more computational strength).
 
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Reply to lparkin
Update end of day 1
What was done
I chose 3D CAD design + prototyping as my starting point for the motor and pulley housing:
• Did 3 iterations of the base design, need to do 1 or two more.
• Designed and printed turntable surface and base
• Designed and printed bushes to fit the 8mm inner-diameter bearings onto 5mm threaded rod.
• Loaded raspberry pi OS onto my pi zero 2 WH.
  • Started experimenting with stepper motor code in Python (can currently rotate small pulley any number of degrees as input from the command line.
What's Next?
• Iterate once more on base design to allow about 2mm of additional space to allow easy fitting of the belt onto the pulleys.
• Design pi + camera housing (figure out what distance from center of turntable to camera will be optimal).
• Design structure to hold pi + camera at the desired height and angle.
• Connect everything and start mapping the digital design parameters:
  • How many degrees on small pulley = how many degrees of rotation on turntable.
  • How many photos to take, how many stops along the way.
  • How to process the images. (on pi or off pi, on a device with more computational strength).
---
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  2 days ago by lparkin | Reply

  Update end of day 2

  What was done

  • Turntable design, printing, and assembly completed.
  • Dummy code flow to rotate stepper according to a config file + take a photo at each stop implemented.
  • Pi cam housing design iteration 1 and 2 done, to be tested.
  • First iteration camera stand and mount designed, to be printed.

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Edit Comment 11712
# A First Level Header
## A Second Level Header

Use one asterisk to *emphasize*

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#Update end of day 2 ## What was done * Turntable design, printing, and assembly completed. * Dummy code flow to rotate stepper according to a config file + take a photo at each stop implemented. * Pi cam housing design iteration 1 and 2 done, to be tested. * First iteration camera stand and mount designed, to be printed.
 
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Reply to lparkin
Update end of day 2
What was done
• Turntable design, printing, and assembly completed.
• Dummy code flow to rotate stepper according to a config file + take a photo at each stop implemented.
• Pi cam housing design iteration 1 and 2 done, to be tested.
• First iteration camera stand and mount designed, to be printed.
---
# A First Level Header
## A Second Level Header

Use one asterisk to *emphasize*

Use two asterisks for **strong emphasis**

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This is an [link to example.com](http://example.com/)

This is an image ![an openSUSE geeko icon](https://en.opensuse.org/images/d/d0/Icon-distribution.png)

This is a user link @hans

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  about 18 hours ago by lparkin | Reply

  Update end of day 3

  What was done

  • The design for the camera housing reached a point of usability
  • The camera stand (iteration 1) was designed and printed
  • The first round scan images were captured
  • Attempts to process the scanned images using colmap failed dismally, for various reasons:
    • My work laptop doesn't have a discrete Nvidia GPU (colmap requires Cuda)
    • Processing without a GPU produced a .ply mesh file that didn't even remotely resemble the model I scanned.
  • Determined to switch to Meshroom, but it is a 19-ish GB download, and the site limits bandwidth to around 500Kbps, so the download wasn't finished by EOB.

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Edit Comment 11874
# A First Level Header
## A Second Level Header

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# Update end of day 3 ## What was done * The design for the camera housing reached a point of usability * The camera stand (iteration 1) was designed and printed * The first round scan images were captured * Attempts to process the scanned images using colmap failed dismally, for various reasons: * My work laptop doesn't have a discrete Nvidia GPU (colmap requires Cuda) * Processing without a GPU produced a .ply mesh file that didn't even remotely resemble the model I scanned. * Determined to switch to Meshroom, but it is a 19-ish GB download, and the site limits bandwidth to around 500Kbps, so the download wasn't finished by EOB.
 
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Reply to lparkin
Update end of day 3
What was done
• The design for the camera housing reached a point of usability
• The camera stand (iteration 1) was designed and printed
• The first round scan images were captured
• Attempts to process the scanned images using colmap failed dismally, for various reasons:
  • My work laptop doesn't have a discrete Nvidia GPU (colmap requires Cuda)
  • Processing without a GPU produced a .ply mesh file that didn't even remotely resemble the model I scanned.
• Determined to switch to Meshroom, but it is a 19-ish GB download, and the site limits bandwidth to around 500Kbps, so the download wasn't finished by EOB.
---
# A First Level Header
## A Second Level Header

Use one asterisk to *emphasize*

Use two asterisks for **strong emphasis**

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This is an [link to example.com](http://example.com/)

This is an image ![an openSUSE geeko icon](https://en.opensuse.org/images/d/d0/Icon-distribution.png)

This is a user link @hans

This is a project link hw#some-cool-title
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