I got a little problem with the 8-port-servo-controller. I attached the servo-power (4-6V) and the VIN
(5-16V)-GND to a labratory power supply with 5V. The RS-232 serial input is connected to the serial interface of the PC.
If I connect a cable to one of the servo ports and look at an oscilloscope I see a nice
PWM signal, after setting the parameters, I can easily create with command 4 an
apropriate PWM signal from 0,3ms till 2,7ms. But as soon as I connect a servo to the
board, the orange (yellow) led is on and there is a constant 0V at the servo signal cable. If I then send a command for absolute position, on the oscilloscope a PWM-signal flashes, the servo
moves a bit, then suddenly, the servo-signal is constantly 0V again, and the servo moves
back a bit again.
With just the oscilloscope connected to one of the servo-outputs, everything looks fine,
but as soon as I attach the servo, the yellow led flashes.
I removed the servo-voltage connection, so only Vin is connected to 5 volt, and then with
attached servo I get some kind of PWM-signal with a servo attached, but only with 3V
height, so the servo doesnt move.
Do you have any suggestion to that problem? I have no idea anymore what could help.
Thanks a lot in advance,
Pascal