Sarah2001
Posts: 2
Joined: Tue Apr 17, 2018 6:08 pm

Stepper Motor HAT

Tue Apr 17, 2018 6:38 pm

I am creating a drawing machine using two stepper motors which change the length of the string which holds the pen (often called a polargraph drawing machine). I am running into problems with the stepper hat and library supplied by AdaFruit (https://www.adafruit.com/product/2348) such as not being able to run two at the same time and locking them properly. I think this is because it is a general purpose board and not specifically designed for stepper motors so is driving it more like a DC motor.
Any suggestions on anything better I can buy to control my stepper motors with?
-Sarah

asandford
Posts: 1999
Joined: Mon Dec 31, 2012 12:54 pm
Location: Waterlooville

Re: Stepper Motor HAT

Tue Apr 17, 2018 10:35 pm

Sarah2001 wrote:
Tue Apr 17, 2018 6:38 pm
I am creating a drawing machine using two stepper motors which change the length of the string which holds the pen (often called a polargraph drawing machine). I am running into problems with the stepper hat and library supplied by AdaFruit (https://www.adafruit.com/product/2348) such as not being able to run two at the same time and locking them properly. I think this is because it is a general purpose board and not specifically designed for stepper motors so is driving it more like a DC motor.
Any suggestions on anything better I can buy to control my stepper motors with?
-Sarah
You might get a better response contacting Adafruit directly, or posting on their forum.

User avatar
Etienne
Posts: 184
Joined: Wed Jul 24, 2013 6:23 am

Re: Stepper Motor HAT

Fri May 25, 2018 3:49 pm

you can manage to do a polagraph using only Raspebby Pi :
[*]see on the forum viewtopic.php?p=1131215#p1131215,
[*]also some more detail in french here : http://www.labfab.fr/portfolio-item/dra ... nimaliste/
I manage to synch up the two stepper using my own python code that interpolates between two points to draw a line.

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