Micro Digger

by blecheimer, published

Micro Digger by blecheimer Oct 28, 2012

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Due to the recent incidents (things appearing on ebay) I just want to make something very clear:
I do not allow any commercial use of my STL-files, my designs and my photos!

As I have now a Micro Dumper ( http://www.thingiverse.com/thing:32773 ) I need something to play with. And what matches a Dumper? Right - an excavator.
My Micro Digger is 25 x 25 x 23 mm (1 x 1 x 0.9 in) and has a fully working arm. It comes with two shovels. One is a standard shovel and the other one can be opened.

I never liked those axis pins. They are always to loose or it is too hard to push them in. So I design new pins with a flexible clamping zone ("flex pins.stl"). Give them a try.

I just added a plated version of the STL-files for more convinient printing.

I added three new STLs wiht bigger holes and slots for those how have problems with a too tight fit of the parts.


  • Print all parts
    I use 0.4mm wallthicknes, 0.1mm layer and 100% infill.
  • Deburr all parts
  • Assemble all parts
  • All parts can be snaped together, but this depends on the shrinkage of your PLA and how well your printer is calibrated.
    If necessary grind the parts that are hard to assemble
  • If some parts are too small (e.g. the pins) try to print them at a larger scale (e.g. 102%) until they have a tight fit.
  • The shovels are difficult to print. Print them slowly and at a low temperature. (e.g. 40mm/s @195°C)
  • Maybe you like to add some paint
  • Open your own construction site!

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I've printed out several copies of this thing and each and every copy I printed I have to take my dremel and carve nearly every piece to make it fit.  Is there any way you could post a version that the rest of us could print and put together without having to get out our tools to put it together?

I have added some new parts. You can try them but I do not know if they fit better. As I am only using PLA I can only guess the shrinkage of ABS.

Good news!  The new parts fit perfectly together.

Thanks man!  I'll give the new parts a shot when I get home later.

You knocked it out of the park again.  I can't wait to get home to print this thing out.  I'll post a pic when I get it printed out.

I already noticed the other one, but this one is even better! Both are awesome ;-)
I'll see if I can populate the Ultimaker office with a few of these!

 Great idea! Turn your office into a daylight mine!