using the Controller and the .Net test program (colinkarpfinger.com/pololu/), i noticed a strange
behaviour:
a) i turn on power on the controller: orange led lights up
b) i set a value (regardles if i operate thge controller in pololu or SSC mode), then push “Send”:
the orange led turns dark
green flashes
red flashes
the servo moves “a bit” to the desired position
orange led lights up
c) repeating step b), the servo moves (in steps) until reaching the desired position
Does anybody have an idea what the reason for this behaviour could be?
How are you powering your servos and your servo controller?
Once you send a command, the orange LED should go off and stay off. The the red LED lighting briefly indicates that something bad is happening, and then the orange LED coming back on indicates that the controller has been reset. It sounds to me like your power source can’t supply enough current, and when the motor starts to move the voltage from your power source drops low enough to reset the controller.
Can you describe your power system, and the command bytes you’re sending to the servo controller (plus what you’re sending them from and how it is connected to the controller)? I’m particularly confused that you say you see the same results in both Pololu and Mini-SSC II mode. Are you sending two different mode-specific commands, or the same command in each mode?
the controller ist hooked up to a pc native (aka no usb converter) serial port
servo power is a ~5v battery pack
controller power is a ~6v battery pack
regarding pololu/mini-scc mode: what i meant was that i tried both modes (so “different mode-specific commands” with jumper correctly set/open)
I used the program i mentioned in my first post for testing - but using my own program, i get the same results (so it looks as if it’s hardware related?)
in my own program, i used mini-ssc mode with 0xff,0x07,0x80 (for example)
Actually, if anything it sounds like there might be something wrong with your servo, like a problem with the potentiometer. Are you seeing this behavior with multiple servos or just one?