B4R Question 2 question about stepper motors drivers A4988 and DRV8825

[vali khandangoll]

firstly What is the difference between a A4988 and an DRV8825 Stepper motor drivers ?
Secondly if we can use this drivers with alone like picture below , then why we use CNC shield ?
thanks.

 

[Mark Read]

firstly What is the difference between a A4988 and an DRV8825 Stepper motor drivers ?

The answer from google: Link

 

[Mark Read]

then why we use CNC shield ?

That depends totally on what you want to do with the motor, CNC, 3D printer, robot etc.

 

[vali khandangoll]

The answer from google: Link

thanks
Very complete and comprehensive

 

[vali khandangoll]

That depends totally on what you want to do with the motor, CNC, 3D printer, robot etc.

Explain a little more with an example

 

[Mark Read]

That is not so easy to explain. You can control a stepper motor with a single chip (ULn2003A or L298N) for example but you will need to build in all the protection yourself. To control the chip you will probably need 5V and for the stepper 12V or even 24V. A shield does this for you. It will be restricted with the maximum current but you have more flexibilty.

At first I started with single chip control but realised that a shield was easier. Even better are the shields which plug into the Arduino directly. Most shields will contrrol two motors or even four at once. Hope this helps you a little.

 

[vali khandangoll]

thanks