Well, The picture of your motor and the parameter, I cannot understand because it's in Germany. But I guest I got that it is a bipolar motor, 3.6 deg/step.
I cannot view your schemes, because it's firewalled by vietnamese network. May you send it to my email :
doanhiep@swissinfo.org?
But because I and some technician here do not know what you did, and cannot see the problems happening to your motor as you powered it. So you follow these steps and tell us if you cannot make it clear at which step
1) Use the batteries 12VDC, apply to YW (+-) and see if there is a torque at the rotor? If yes, continue with RB (+-). If it's clear, continue to step 2
>> Your motor is good, it's not dead, because there are torques as you power the 2 windings.
2) Use the batteries 12VDC (don't use 17VDC) then apply (+-) as the sequence below:
YW
RB
WY
BR
If your motor turns, your motor works good. Why you have to do so is because as you pwr the motor by hand, you cannot run it too fast, and you will sure that your motor works well at slow speed at highest torque.
3) Do not connect your motor to your driver. Use 4 leds (2 red and 2 green) to test the outputs of your MC34xx. Note that you have to put 10K resister to protect the leds. Measure the output voltage, are they near 12VDC as pwr supply?
Test this, you will sure that your driver working. If it works, continue to step 4
4) Connect your motor as identically as you did test, set one pulse to your MC and keep this pulse HIGH, don't turn it off. Check if your motor has its torque. If it works, oki, you nearly make it clear. You don't have to take care of CW/CWW bit. if it turns, GOOD, you don't care bout the direction. We can change it later.
5) Set 2 pulse (1 second a pulse, each duty cycle of a pulse is 50%, which means ON in 500ms, OFF in 500ms, ON in 500ms, OFF in 500ms). If your motor turns 1 step, it works good. Try with 100 pulses (1 second period pulses). If your motor turns 1 revolution, it works good.
6) Reduce the frequency of those pulse to 100 pulses/second.
So, at which step you cannot make it through?