River Song's Blaster

by metaform3d, published

River Song's Blaster by metaform3d Dec 17, 2013
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Replica of the Alpha Meson Blaster carried by River Song in Dr Who.

I've re-uploaded all these parts in millimeters, so you may want to get them again.


  1. Print all five parts
  2. Cut an appropriate length of PVC pipe (21.5mm diameter)
  3. Assemble the slide parts around the pipe (I use epoxy for plastics)
  4. Attach pistol grip and the bottom thing on the slide
  5. Sand, prime, sand again
  6. Paint & weather

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Excellent work! Made one and posted it as a Make. Whovians forever!!!!

FYI, STL files don't contain any scaling information, so the "units" are undefined. Slicers all use mm as the units. People use whatever units are convenient when designing (typically inches or mm), but that info is lost when it's exported to STL. Because of this, most slicers (Cura, Makerware, etc.) have a "scale inches to mm" button to scale things larger by 25.4x. And the all can scale, so you can scale by 25.4 to do the same thing as the button that you don't have. :-)

Uhm. The parts are really small.. the pistol grip is 4.41mm tall. I know I can scale them up, but then they might not fit on the tube if I just start guessing at scales.. could you upload larger versions, please? :)

The files have units in inches, which is what my printer likes and the scale is correct for me. Obviously your printer would like millimeters. Scale by 25.4.

I've been told by other users, that Thingiverse assumes mm when files are uploaded, and so files are scaled down violently whe uploaded in inches (how to even determine which scale an stl file is in is beyond me).
Long story short, it's Cura (my slicer) that likes mm and not my printer.. it only eats gcode =)

I am worried that if I scale up, I will loose details that got lost when the files were scaled down by thingiverse.. so.. I might not print these after all (but thanks for the scale anyway).

you shouldn't loose details when scaling .stl files. They are just triangles using real number coordinates. You have the same number of triangles after a scale operation. It is only when you get to gcode that the slices might have to discard details to be buildable.

OK, I wasn't aware of that. Thanks for the info. I've re-exported all the parts using millimeters, but I can't verify that they're correct.

Looks much better now. Thanks! :) (.. now I know what to print in januaru when I'm done with Christmast stuff ;))

I know, right? A Dalek asking for mercy?

Nice job.

Did you know the original prop was made from a nerf gun? I know this because my son has an example of the very model of nerf gun they used.

Thank you.

Yes, I would have liked to have found one for reference. As it was I had to eyeball the scale.