I'm trying to control the Wowwee Elvis android by SSC-32 controller
but I'm having some issues.
Since the animatronics in the android is controlled by "5 wire" servos that consist of large gear motors with 10K pots on top and the common controller which moves them (no internal circuit per servo) I decides to disassemble HS-645MG servo and took its internal circuit and wired it to the pot and motor of the neck twist.
But when I tried to use Lynx SSC-32 Terminal (servo testing program) to move the servo
it only worked in two opposite positions, i.e. when I move the slider control down nothing happens until somewhere at P1940 (90% length of slider) when the motor snaps and turns to the end-right position. The same is with the opposite sliding. It will only start at 2250 (10% length of slider) and turn the motor to the end-left position.
I suspect that the internal servo circuit I used doesn't work with this type of gear-box motors. Should I use Single H-Bridge - HS-5745 Servo Amp?
Or it's something different?