DC Motor Driving

[aaronw_06]

Hello All!
I am working on a project to assist in driving a linear guide rail using a DC stepper motor and from the research I have done I believe using a Raspberry Pi board would be the best route.
What I am trying to do (in a nutshell) is use a DC stepper motor (low RPM and Torque) to drive a linear rail until the rail reaches a NPN proximity sensor then reverse the motor. The NPN sensors I have are a TURK 4 wire 10-30vac and I will need to program the motor to run at a certain speed..I would like to utilize a battery pack(i assume a Lipo) to keep the entire drive mechanism in a portable case.
In all honesty I have no idea where to start from the computer board side as my background is more mechanical.
Any advise would be very helpful!
Thank you.

[TheFireman]

Ok , some links for your studying pleasure

A little pricey, Adafruit has this hat. The page also has a link for the PDF of the article, and software
(Adafruit has several hats/controllers for stepper, servo and DC motors)

https://www.adafruit.com/product/2348


two links to the ever-popular and inexpensive 28BYJ-48 stepper motor with ULN2003A Driver board combo,

http://www.scraptopower.co.uk/Raspberry ... spberry-pi

https://medium.com/@Keithweaver_/contro ... fbd482f886

(two years ago, I was buying these for 5/$10 shipped off eBay and Banggood/AliExpress.. prices have climbed since..)


a link on using the DRV8825 style of stepper driver
(also the TMCxxxx series of drivers)

https://www.youtube.com/watch?v=LUbhPKBL_IU

lots more can be found with Google search,
, such a simple setup can also be done with (gasp) an Arduino.

[PiGraham]

I am working on a project to assist in driving a linear guide rail using a DC stepper motor

Do you mean a unipolar stepper motor (e.g. 28BYJ-48) with five wires, one being the common centre point of all coils?

Most steppers are bipolar with H-bridge drivers creating alternating current in the coils.

Or do you mean "DC brushed motor"?

[aaronw_06]

I apologize for that I am looking towards a stepper motors you shown below.

Do you think the NPN proximity sensors will be an issues to use?

I am working on a project to assist in driving a linear guide rail using a DC stepper motor

Do you mean a unipolar stepper motor (e.g. 28BYJ-48) with five wires, one being the common centre point of all coils?

Most steppers are bipolar with H-bridge drivers creating alternating current in the coils.

Or do you mean "DC brushed motor"?

[pcmanbob]

Do you think the NPN proximity sensors will be an issues to use?

There may be issues seeing as you say they operate from 10-30vac, you will not be able to connect such an output directly to the pi gpio it is 3.3V only.