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Author Topic: Toolmarks on 3D printed pistol frame  (Read 879 times)

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Offline kgarrison

  • Posts: 29
  • Gender: Male
    • San Bernardino County Sheriff's Department - SID website
Toolmarks on 3D printed pistol frame
« on: June 21, 2022, 03:44:04 PM »
Inspired by the recent 2022 AFTE presentation: Identification of Toolmarks Present on Additive Manufactured Components
By Corey Scott

I looked for some of these markings on a 3D printed pistol frame I received in casework. This photo is from two casts I took of the bottom of the trigger guard. I phased on a start/stop mark on the far side of the casts, then shifted the left cast over a few layers to see if the marks repeated with the photo'd results. Toward the left of the frame you can see the semi-circular marks which I'm assuming is from the nozzle as it starts to extrude the layers of the curved trigger guard.

Also attached is a photo of the trigger guard area. You can see several of the donut shaped start/stop areas from the nozzle in this photo.
« Last Edit: June 22, 2022, 10:15:50 AM by Wendy Gibson »
Kirk Garrison
Firearms and Toolmarks
San Bernardino County Sheriff's Dept.
Scientific Investigations Division


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