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l297/l298 stepper motor driver problem

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ali107

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i have a unipolar stepper motor.its specifications are TYPE:23LM-C701-01 , N/P: RH7-1048 04 , 5.2V/PHASE , 1.4 A/PHASE, 1.8 DEG/PHASE...
i have made the l297/l298 stepper motor driver which is shown in the datasheet of l297..
http://www.soiseek.com/STMICROELECTRONICS/L298/

reset=1
clock=PWM
H/F=0
CCW/CW=1
vs=12v
vref=0.5v
Sense resistor=0.5 ohm

but its not working..when i check that l298 gets warm and the motor is not working..can anyone help me with this??..
 

I think, you should check PWM output(L297).
 

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