Treedix 2pcs Servo Motor Metal Gear High-Torque Servo Motor Compatible with Smart Car Robot Boat RC Helicopter Airplane (Control Angle 180)

Works well with Arduino. Good torque for moving robot.

I purchased these servos to prototype a Venetian blinds control system. Specifically, to control the tilt of my blinds with HomeKit. I decided to use servos because they are easy to control with a microcontroller, in my case a Raspberry Pi Pico W. I had to modify the servos for continuous rotation. The tilt mechanism on my blinds is a 5mm hex rod running the length of the blinds so I decided to drive it directly from the servo using an available shaft adapter. I will describe the method to modify this servo since servos are commonly purchased with this in mind. The modification consists of disconnecting the feedback potentiometer from the output shaft and removing the stop pin from the final drive gear. Removal of the stop pin is easy for this servo as it is just a press fit. If the stop pin is not removed, shaft rotation would be limited to around 180 degrees. The feedback pot was a little trickier since it was soldered directly to the circuit board instead of being attached with short wires as in some other servos. The pot can be punched out from the drive side while you have the final drive gear out to remove the stop pin. I temporarily disconnected the two short wires from the drive PCB to the motor to make working on the mod a little easier. With the PCB and its attached feedback pot free, I clipped the pot loose from the circuit board. It is necessary to provide feedback to the drive circuit in order for the motor to remain stopped with a 1500 usec PWM pulse. Some replace the pot with a center tapped 5 kOhm resistor network but I chose to attach three wires to the circuit board and bring them out to an external pot. I considered cutting off the pot shaft and sticking it back into the case but that would make adjusting for null difficult. Reattach the wires to the motor and place the circuit board back into the case and you're done. I applied a 1500 usec PWM pulse and adjusted the feedback pot for zero motion, then applied 1000 usec and 2000 usec pulses to test the CW and CCW rotation. This servo is not particularly fast at those settings (~60 RPM) but perfectly acceptable for my application. The duty cycle for my application is very low so I don't expect to wear this servo out. If it fails prematurely, I'll report back. The published torque will drive my application nicely and I will report any problems with that as well. All in all, a good value for two servos that appear to be well constructed. A very simple design with metal gears and sleeve bearings and it comes with the requisite collection of horns and wheels. Just a little more difficult than some to modify for continuous rotation because of the attached feedback pot.

Works great on my 1/10 crawler better than the hexfly servo

it powered on and responded to the Tx. it's splash resistant at best, time will tell

I purchased these servos for a robotics project. I could never get them all working correctly while trying to fix the noise and they all died.