Re: Cannot seem to solve this issue. Please help.
What happens when you replace the 850 millisecond wait with a longer period of time (say, 2000 milliseconds)? Does the robot turn correctly then? The only thing I can think of is that the wait command is not long enough for motor C to 'push through' the additional friction of motor B being stopped. On that note, I tried the code you have posted on an NXT bot with a fresh battery (REMBot) and it worked correctly; double check the battery level of the NXT to see if it is low, and if so, I would suggest charging it fully and re-testing the code.
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