Hi everyone, i have a stepper motor and i want to drive it with L298N driver module, i placed my stepper properly , one bobine to out 1 & 2 , and other bobine to out 3 & 4, i placed IN1,2,3,4 to 8,9,10,11 by order, i used 20v 2.25 Amps as a power supply and i removed the 12V jumper in the module, and i placed the 5v of the module with 5v of arduino uno, my probleme is : when i place power supply, the stepper make a proper clockwise turn, and also a proper counterclockwise turn, only one, after that, the stepper start juggling and seem to have a difficulty to turn and it doesn't complete the turns .it's like the stepper have epelipsy !
By the way i worked with the arduino stepperonOneRevolution program, and my stepper specification are :
-Modele : 42HS34-1704 / -minimal voltage : 2.2V / -minimal current :1.7 A /
ps: I TRIED WITH DIFFERENT POWER SUPPLIES ALSO (15V 5 AMPS), (12V 5 AMPS), (18V 3.5 A)
here you have the schematic worked with : (IN ATTACHEMENT)
You are trying to use a low-impedance stepper motor with an H-bridge driver. This doesn't work.
You need something like a DRV8825 stepper driver as your motor needs current drive, not
voltage drive.
Your motor is low impedance (2.2V/1.7A = 1.3 ohms. Trying to drive it from 20V through
an H-bridge it would be trying to pull 20/1.3 = 15.4 amps (and 310 watts!)
The only steppers you can drive with an H-bridge at 12V would be around 40 to 50 ohms
in winding resistance. And they would only go slowly at that.
You motor needs a current-controlling drive, not a voltage drive.
Thanks for your fast reply, i understand you, brother i already bought 4 of this drivers, if there is any way to get my steppers work with it i would be thankful, if there is any circuit to add or something please advise me
thanks
Buy the proper drivers. Those L298 drivers are crap motor drivers and even worse stepper drivers. The DRV8825 drivers would work, but need heat sinks and, maybe, forced air cooling to supply 1.7A. Similar drivers are available from many vendors.
Be sure to set the coil current limit on the DRV8825 drivers before you use them. See the instructions on the Pololu page.
Thank you Fungus, i appreciate that .
barhoma881:
Thanks for your fast reply, i understand you, brother i already bought 4 of this drivers, if there is any way to get my steppers work with it i would be thankful, if there is any circuit to add or something please advise me
thanks
No, you need current control for low impedance steppers. The DRV8825 modules are incredibly cheap BTW. Buy some extra in case you blow one up (the warnings about not connecting or disconnecting the motor when powered up are not to be ignored).
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