Dawn Robotics Forum

So I have built the pi-bot with Andys tutorial and except for the streaming lag which I'm working on, everything seems great ! .. except ( lol ) I get some servo stutter...please see https://www.youtube.com/watch?v=lPSHspa99ik Now I have tried uping the power from the 7.2 v direct but this didn't make any difference. I have used the same pan and tilt on a 5v before, without any problem any ideas people ? Oh and as you can see there more than enough power to drive the 4 wheel drive motors via the Dagu Arduino Mini Driver Board.

Hi there,

Cool robot. Not sure about the servo stutter though. I do get a slight stutter on the servos of the pan/tilt unit we sell, but I'd assumed that that was just the motor controller seeking to the target angle.

There is the possiblity, that there is some bug in the Arduino sketch I wrote for the mini driver. Could you try programming your mini driver with one of the Servo examples from the Arduino IDE like servo sweep or servo knob to see if they cause servo jitter also? If you have access to an oscilloscope then it would be good to have a look at the generated PWM signals to see if you can see jitter on those signals.

Regards

Alan