Cánh Tay Máy Xúc (Excavator Arm)

The dovetail connections are a bit unintuitive but you sort of turn them into eachother until they lock. They seem to hold fine in this application if you get your tolerances correct. 

Clicks together with printed pins, no hardware or glue needed. All parts fit on a 200x200 Bed individually if you lay them down diagonally. STLs are already in recommended orientation. the arm brace needs a tiny bit of support for the tip of the dovetail. When assembling, make sure that the Dovetails are only visible from below. In my experience that's the strongest orientation for when you have some weight in the bucket.

Unfortunately I was not able to test it properly as I don't live anywhere near a beach and going to the kid's sandbox as an adult man feels a bit strange.

The amount you need to print of each is in the file names.

I printed everything in PLA with 0.2mm layers, 3 Walls and cubic infill. Just make sure the Dovetails are tight and it should hold up alright.