Arduino Stepper Motor Controller (Bipolar) - First Test...

This is a bipolar N-channel MOSFET stepper motor controller, controlled by an Arduino. It uses an external double h-bridge to power the motor windings. Each h-bridge is controlled by a direction signal and a PWM/Enable signal. A total of 4 digital outputs from Arduino (2 PWM and 2 digital). The motor is rated at 5.9V, but I use 12V. So I have to use a duty cycle of 50%. To get the motor go a little faster I use a kind of chopper modus, skipping the PWM signal for a few milli secons when the coil get first energized. This wil cause the current to rise quicker in the motor coils. The speed will increase with the voltage, and I am planning to use 36V. At 12V I got the motor running at 150 rpm. (Tooooo slow). The program (Arduino sketchbook) uses one timer interrupt for controlling the steps. This will use an external interrupt instead when I connect a PC CNC program later on. And then it uses one timer interrupt for controlling the "chop". Schematics and more at http://www.lamja.com/

Category:

Howto & Style

Tags:

• Bipolar
• stepper
• motor
• controller
• driver
• arduino
• h-bridge
• chopper
• n-channel
• mosfet
• PWM

[despedes]

Hi. Could you post the controller's schematics at your site? Thanks in advance

[pilleyuppo23]

@despedes Hi. I have a newer version at my site:

"Double PWM controlled H-bridge for interfacing with an Arduino"

It's almost the same. There you can find schematics and board layout.

[NTComputer86]

intruter alert intruder altert

[Digadogup]

@HeadShot360IN i was about to tell him to make a dubstep from the motors XD

[HeadShot360IN]

from 0:14 to 0:17 it sounds like the begining of inspector gadget dubstep watch?v=oib0JvkDzYk

[axel1973w]

Extreme loud... does not sound like "smooth" steps.

[elgus]

@mate2000 a mechanical relay can't switch as fast  as an electronic switch

[mate2000]

Could you do this with mechanical relays? Or would the relays not be able to follow such fast changes?

[n00448198]

I think your web site needs updating cause from the circuit you have there, I dont understand how your clipping the signal. I love the video and nice work. I havent tried running my motors in bipolar mode but I do have a current limiting circuit built. I measure the voltage across a .5ohm resistor by first inputing the voltage into an active low pass filter and then a comparator which is feed into the enable logic gate. Nice work and please keep me updated.