Strange servo move with SSC-32

Lynxmotion Electronics & Software
1

I connect 18 servo to ssc-32, remove jumper VL=LS1 supply VL with 9V 320 mA and supply 6V 2300 mA to VS1. When i send all=1500 command to SSC all servo move to it center position. At this point it seem to be OK.
but when I leave it at about 2-3 minute all servo start move to 180 degree by it self. (I don’t send any new command to SSC the last command is all=1500).
Now all servo position is 180 degree so I send all=1500 again but this time all servo don’t come back to 90 degree. then I reset ssc and re-connect LynxTerm and send all=1500, servo go to 90 degree and again if I leave it for 2-4 minute servo will start to move again.

what wrong with it?

2

Batterys are probably under charged. Use a multimeter to monitor voltage and see if it decreases to below normal operating voltage.

3

Not sure what you mean by servos going to 180… Can you post an image of your wiring and maybe a video? Does the LED blink when the servos move on their own?