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