Micro Maestro not working with some servos

I purchased two Micro Maestros and am excited to take advantage of their speed and acceleration control. One appears to be working with four 9G micro servos, but only two of the five servos connected to the other respond. These servos (https://www.amazon.com/gp/product/B076CNKQX4 and https://www.amazon.com/gp/product/B07QPM6D5J) respond as expected, but these servos (https://www.amazon.com/gp/product/B07GJ6ZCVY and https://www.amazon.com/gp/product/B07GK1G5FV) do nothing.

I have confirmed that all of the Maestro’s output pins work by moving the working servos to the other pins. I have also confirmed that the non-responsive servos are functional by attaching them to a servo tester (https://www.amazon.com/gp/product/B07Q8QSNYY). During testing the Maestro was powered via USB and the servos from a 6V source (same source used to power the servo tester).

Any ideas?


I am sorry you are having problems with your servos. Do you know the stall current for those servos? Can you post some pictures that clearly show your setup and all connections? What is the voltage and current rating of your power supply?

Can you try running only one of the suspect servos to see if it works by itself?