Stepper motor control using Raspberry pi 2 and simulink

Question

I am new to the raspberry pi and simulink. Is there a way I can write a program in simulink to control a stepper motor using raspberry pi 2. Do I need any other external circuitry other than the basic which is the stepper drive, switching transistors, e.t.c?

ravi_butani · Answer

For drive stepper only you need l293d and four diode or uln2003 driver Ic...no extra components needed...

rew · Answer

The ULN2003 is not suitable for most stepper motors. To use an ULN2003 as a stepper driver you need a 5-wire stepper motor. Or a 6- or 8-wire one that can be configured as a five-wire one. Many steppers are 4 wire nowadays.

The L293D is an antique chip that could be used to drive a stepper. But certainly it won't be able to operate the stepper at close to maximum performance.

Often there is a tradeoff where you get simplicity as a tradeoff against better performance.

However in this case you can buy a "polulu stepper driver" based on say an Allegro A4988, which is simpler and will drive all steppers EXCEPT the 5-wire ones. As a bonus using that will be simpler than wiring up your own L293D stepper driver.