Help
I am using two HSR-5990TG’s with the Dual Servo Bracket ASB-13 to try and support and tilt a 2 Lb Camera. I have attached the servos to a “Y” cable and then to a single channel on my RC Receiver. But when I turn on the power A mercilessly Hi-pitched squealing is emitted from one or both of the servos. Whats wrong?, I guess the servos are fighting each other but how can I fix this and avoid this mind-numbing noise…
Thanks, CR 
There are others who probably can answer this better than I can.But I am curious.
I have never used these servos, the only digital one I have used is two large 5745… servos in an ARM and they make a lot of noise! I have also seen other threads talking about how loud they are. Such as this one:lynxmotion.net/viewtopic.php?t=2742&highlight=5990+noise
So I guess the question is, are they making the normal mind-numbing noise or something worse?
Kurt
You may want to consider a better pan/tilt design that does not require the servo (probably only need one instead of two) to hold the weight of the cam.
there is an adjustment procedure where only one servo is connected to the C bracket, power is applied and pulses set to 1500, then holes are spotted and drilled for the bracket in the second servo horn, and then th c bracket and servo horn on 2nd servo are screwed together. the entire point in that process is to have both servos powered WHEN the second servo is mechanically attached to the bracket. if you don’t do it this way there is no good way to sync the two servos.
If a “Y” cable is used, you will have to drill holes. If you connect each servo to its own channel, you will not have to drill holes since you can program an offset for each servo. Using an offset will allow both servos to work synced together instead of against each other causing that servo whine.
I’m not big on R/C but is there anything close to a mixer that allows trimming of two servos independently using a single input PWM?
Everything so far is correct. One other method of making the two servos work better together is to use the HFP-20 programmer to force one servo to track the other. You can do a three point calibration at center and the two extremes. Power one servo from your controller, and connect the other to the programmer. Move and set the positions for the three positions. I have not done this, but I see no reason why it wouldn’t work well.
These all sound like good ideas, I am testing them now. Is the HSR-5980SG any quieter?
CR
Same as far as I can tell.