A motor or a servo you buy has its own odd sizes and mounting tabs. ReDo puts it in a printed case that sits on the grid, so it bolts into a build like any other part.

A micro servo in its case: one body with M3 holes on every side, and a lid over the top.
A micro servo in its case: one body with M3 holes on every side, and a lid over the top.

The rules

  • One body and a thinner lid. The motor drops into the body, which carries every mounting hole and takes the motor's loads. The lid only closes it. A case is never split into two halves, because then whichever half was screwed down would hold the motor by its screws alone.
  • A row of grid holes for every 10 mm of height, on every side. Each is a threaded M3 hole, so the case can be fastened from any face, the top row included.
  • The tabs come off. A servo's mounting ears and a gear motor's end tab are cut off, as you would do for real, and the case is sized to what is left.
  • Its sizes are on the grid. The case is rounded out to whole cells, or to 7.5, 5 or 2.5 mm steps, and the motor's shaft sits on a grid line.
  • The lid meets the body square: no chamfer on the faces where they touch.

In the Inventory

Each case comes as its own part and lid, and as a module with the motor already inside, such as the Micro Servo Module and the TT Motor Module.