2WD Robot, ArduinoMega 1280, PanPing sensor problem

Hello everybody. 

First sorry for my English but not good. I want to ask the profis about my robotics problems. :) 
I have a 2wd mobile platform. I played with this so many and my old simple codes was working well. 

But I decided, I want to upgrade a little bit my "stupid" code which was very good with the fixed ping sensor and some IR sensor but too simple. Than I rebuilded all IR sensor first, and builded a little servo for the PING sensor. 

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[original story: Let's Make Robots]

Let's Make Robots 15 May 19:37
arduino  avr  ping  servo