motorized lens, motorized focus, motorized aperture, and two high accuracy and high speed stepper motors that drive belts to gear up speed.. There's 5 electronic motors right there; The Huisun drifts, all cheap PTZ's drift and loose orientation because the motors are so damn cheap.. Cant trigger something by a motion sensor or another camera if after a few dozen triggers its looking in an entirely different direction than desired.. The Huisun MiniPTZ could not even be used for much other than a fixed camera with as slow as it moved.
power supplies are failing very well could be due to motors driving too much current and generating too much heat/stress; obviously they dont have a decently educated electrical engineer in house.. when your diving motors the power driving becomes more electronically complex or someone will move a motor by hand and fry your electronics.
My Black Face PTZ has german made belts and Japanese made motors/caps/and ccd; you cant gather up these raw components for the price you want a PTZ for; let alone manufacturer it.. Software Developers, R&D and QA also dont come free either.. unless steal code/designs and make your customers work out the bugs for you.
You cant get a decent 2MP Fixed cam for $50, you can get a cheap piece of junk for $50; you can get a decent one for $100-$200.. the price you want a decent PTZ for.
The motors in the Huisun MiniPTZ are cheap mass produced motors for kids toy's and other junk, anything they put em in becomes junk just by inclusion.