Servo Motor SG90 9g 190deg

SG90 9g servo motor from Tower Pro.
5v operation, PWM controlled 0 to ~185degrees.

I have used about 8 of these motors in the last 4 years. Please be aware that a few of they jam from time to time. A very gentle twist of the output axle while the servo is being driven seams to be the best method to "un-jam" them.
They work better with time - ***it might be advisable to build a circuit to drive them from minimum to maximum deflection (0 to 190) 10-20 times just to get the grease in the gears to spread nicely*** - I suspect the grease causes the jamming problem.

**As with all servo motors, please note that if it gets hot while you are driving it - you are not driving it correctly - check your electrical circuit and the mechanical attachments. These servos also get warm when jammed.