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Driving bipolar stepper with uC

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Beowolf

Beowolf

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I have a bipolar motor, and software written for PIC 12F508 to drive unipolar motor.
Is the schematic in attachment correct for this purpose?
Coil A1, CoilA2, Coil B1, CoilB2 are the lines form PIC, while A1, A2, B1, B2 are the actual motor connections.
 

use ucn5804
it wil not only simplify ur code but also ur schematic
 

I found L9219, it will do the trick.
 

Use L297 and L298 , it simple for drive motor stepper
 

No no.. I agree with Beowolf in setting up his own bipolar stepper driver...

What's the fun in using L297 ?
 

Integrated drivers are OK for small power motors. But, in general, is my idea of bridge OK? With it I could drive more powerful motors. I have a large unipolar motor, but to incre4ase torque, i think of using it in bipolar mode (central tap left unconnected).

Any suggestion?
Has anyone a design using low rdson power MOSFET?
 

hi
I'll sugest to use a PNP NPN H-bridge... the NPN-NPN limits your voltage over the coils...
19_1175272909.gif


the complete circuit should be like this...
63_1175272987.gif


(sorry I forgot the diodes & the image is very old...)

you should drive the TIP's with extra circuit or use darlington PNP- NPN... (well designed, It could drive a 12V SSmotor with 5v TTL)

cheers!
 

@Beowolf

Have you completed the bipolar stepper driver ?

I will recommend you use L298/L293 and a microcontroller...
 
No, as I managed to destroy the shaft of the motor, I halted on that for a moment. When I acquire another motor of the appropriate size, I'll continue with the development. As I'm currently involved in another project, this will be done in one week from now.

The bridge for a more powerful motor is weeks ahead.
 

@Beowolf : Have you completed the bipolar stepper driver ?
 

Kurenai_ryu said:
(well designed, It could drive a 12V SSmotor with 5v TTL)
Click to expand...

(Only just spotted this)

These circuits are poorly designed, and certain to let the smoke out. In the top circuit, if the inputs are left open all the transistors will be on at once. BANG! The bottom circuit has the same problem, and also lacks base resistors for the lower trannies.

Jim
 

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