Cycloidal Drive

Instructions

All parts can be made from just about any thickness material but a few of the parts should be cut in a specific order to make sure they fit together correctly. One copy of each part is needed except for the **End** part which you'll need two. You should make all cuts with an offset of 0 except for the center holes of the parts. 1) Cut out the **EccentricCam**. 2) Glue 2.5 inches of 1/4" dowel in the **EccentricCam**. 3) Cut just the center circle of the **CycloidalRotor** with an offset of about -0.2mm to make sure the **EccentricCam** easily turns in it (but not too loose). 4) Finish cutting the rest of the **CycloidalRotor** with a 0 offset. 5) Cut the center shape of the **Stator** using an offset of -1 mm. Make sure the **CycloidalRotor** can easily rotate around inside the **Stator**. Enlarge the **Stator** hole if it doesn't. 6) Finish cutting the **Stator** with a 0 offset. 7) Cut the center holes of the two **End** parts with an offset of -0.2 mm. Make sure your 1/4" dowel can turn freely in it. Finish cutting out the rest of the two **End** parts with 0 offset. 8) Cut out the **OutputDisc**. Glue dowel pins into the ring of holes on the outside. They should extend less than the thickness of the plywood you used. 9) Glue 2.5 inches of 1/4" dowel in the center hole on the opposite side of the **OutputDisc** . 10) Cut the center hole of the **OutputStator** part with an offset of -0.5 to -1 mm so that the **OutputDisc** turns in it freely (but not too loose). 11) Finish cutting out the **OutputStator** with an offset of 0. 12) The **EccentricCam** and the **CycloidalRotor** should be sanded so they are slightly thinner than the other parts (as shown in the last photo). This helps them fit together better. 13) Assemble the the parts as shown in the exploded picture. 1/4" dowel pins can be friction fit into the four corners of the **End**, **Stator** and **OutputStator** parts so that it can be easily disassembled. Testing After assembly, you should be able to turn one revolution of the dowel sticking out of the **EccentricCam** in either direction and the output dowel will turn 1/6 revolution in the OPPOSITE direction. You shouldn't be able to drive it backwards by turning the output dowel. https://www.instagram.com/p/BukNI--h2dU/