tamiya motor 3 volt

[aswad]

quite have problem with it, anyone can help?
can run but, not sync with my program

[robosang]

What do you mean by Sync? How is it being controlled?

[aswad]

using pwm,
if i misconnect the motor 2, motor 1 full speed as program.

[robosang]

Show us the hardware in detailed, what power source are you using? How is it being controlled from the controller?

[aswad]

here the circuit, any comment?

[robosang]

Not enough power from your battery, that is my guess.

[aswad]

so what battery must i use? can u suggest?
is it still not enough use 12 volt battery?

[yonghui]

12V from where? what kind of battery u are using.

can u try to control the speed of a single motor 1st? try to change speed from 0 to full speed.

[aswad]

one thing, my timer 2 pwm period is 51 micro second. is it suitable to 3 volt motor?
then is it correct to use timer 2 also in CCP2 PMW mode?

[yonghui]

if u are using timer 2 in PWM mode, do not change the PR value since PR2 value will determine the period of the PWM. PWM frequency normally is in Kilo Hertz range. the higher frquency u have, u will get lower resolution of PWM. u try to read the datasheet of PIC. CCPR2 registers value will determine your duty cycle.

you can use the timer 2 interrupt as counter, but do not simply change the PR2 value.