Question about robot design

[Khách]

Hi, i would like to know how to make the robot move in straight line , because last year , when i let the robot move forward , it bends to right , both motors were the same type but they were used motors ... are there any mechanism to let the robot move in a striaght line ??

thanks alot , very usefull forums .

i wish to win in egypt so i can meet ya guys in vietnam :),inshallah
Ahmed , EGYPT

[butu]

I think u can wire a serial Variable resistor to one of your motors and vary it until u get the two motors rotate equally , then replace the Var. res. with the fixed resistor .

[bien_van_khat]

Hi, i would like to know how to make the robot move in straight line , because last year , when i let the robot move forward , it bends to right , both motors were the same type but they were used motors ... are there any mechanism to let the robot move in a striaght line ??

thanks alot , very usefull forums .

i wish to win in egypt so i can meet ya guys in vietnam :),inshallah
Ahmed , EGYPT

I think there's another way by doing experiences. At each robot speed, trying adjust the pwm values until it move in a straight line, save them and you will have all you need.