[SOLVED] 8051 clock input signal to L297/L298

[Kevin Benguillo]

Hello. i am using AT89c51 micro controller in driving bipolar stepper motor. can someone give me idea on generating PWM clock signal to the L297???(like period, pulse width, duty cycle, etc) i have read somewhere that if have wrong clock signal, the motors will be destroyed. :shock::shock:


C code is appreciated.
thanQ:grin:

 

[embpic]

according to me steeper motor does't require PWM it just required pulse and no matter of duty cycle.
and servo motor required PWM so for steeper motor just give pulses to IC and keep current at low. and motor will not get destroy.

 

[jayanth.devarayanadurga]

http://www.8051projects.net/pulse-width-modulation/8051-pwm-example.php
http://geniusdevils.com/2013/04/8051-pwm-c-program/
http://saeedsolutions.blogspot.in/2012/06/8051-at89c51-pwm-code-proteus.html

 

[embpic]

@jayanth.devarayanadurga
sir as you given link they required 50% duty cycle and can be achive with timer is it right?
bcoz in timer other work can be done.

 

[Kevin Benguillo]

Thank you for the reply. but what is the typical value (in seconds) for the period of the pulses??

 

[jayanth.devarayanadurga]

Yes. ON time 50% OFF time 50%.

 

[Kevin Benguillo]

Yes. ON time 50% OFF time 50%.

what is the time period to like let the current accumulate for the motor to turn????

 

[jayanth.devarayanadurga]

http://www.onsemi.com/PowerSolutions/product.do?id=LV8746V
http://www.talkingelectronics.com/projects/Stepper Motor Controller/StepperMotor.html

http://www.maximintegrated.com/app-notes/index.mvp/id/4469

 

[Kevin Benguillo]

Thank you sir. this really helped me a lot .

The thread can die now.