The Legendary Brad Clark from RiggingDojo takes a look at rigging a mechanical interaction such as an Engine’s Pistons or Cranks in Maya with out the use of any complex math.
Brad Clark Writes: Don’t let mechanical rigging and complex looking interactions overwhelm you, get back to the basics. This #rigTip from Rigging Dojo lets you rig up a crank and piston action with out any complex math.
mungers
Its a shame this doesn’t actually work. If you look closely the rod that slides back and forth actually moves in Y very slightly due to the varying length of the constraint compared to the fixed length of the oscillating bone. If the grid had have been turned on this would have been easier to see.