In FIG 1 is shown a wave gear drive comprising an inner gear having a given number of external teeth and {HEAD ~ an outer gear} having {TAIL ~ a slightly larger number} of internal teeth 
having
In FIG 1 is shown a wave gear drive comprising an inner gear having a given number of external teeth and { HEAD ~ an outer gear } having { TAIL ~ a slightly larger number } of internal teeth
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH