Mini Exec Digger

by msraynsford, published

Mini Exec Digger by msraynsford Jan 14, 2012


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A mini digger executive toy. 4 moveable joints, rotating base, 2 arm joints and bucket control from the 2 levers at the back.

These are available as kits through my website.


Simply cut out and assemble with M3 bolts. The two main joints require 35mm long bolts which are slightly tricky to get but the holes can easily be drilled to 4mm and M4 bolts used instead.

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Beautiful! I just cut one of these out of 1/8" (3mm) acrylic. Fit is perfect, design is great, all is fantastic. I'll tell you, this little guy is screaming for some servos, though. I think I am going to have to robot-ify this as well as maybe scale it up a bit and do it on the CNC instead of the laser. BTW --Was it your intention to use BB's for the bearing at the base? I thought that I was the one who invented that. At any rate, the fit was perfect and an even number of BB's fit in the groove with no spaces in between. Perfect. Absoulutly perfect. Thank you my friend.

There's something odd about the holes in the "body" (the vertical parts that stick into the circular base). After converting to DXF and then gcode those did not produce toolpaths. In Inkscape they look ok (just slightly lopsided).

Any tips for gluing up the bucket?

I have seen that happen to me too, something about the conversion to dxf from inkscape. I've not totally figured it out yet but I've opened the svg in another program and exported that to dxf and it has been fine.

Build up the layers of the bucket quickly, clamp them together and then use a straight edge to square it up before the glue completely sets and you can move the pieces around slightly.