Project arduino stepper motor

Other Hardware Motors, Mechanics, Power and CNC
1

Hi,

im doing a project that tests how the stepper motor reacts to different signals(sinusoidal, square, triangular) and i have few problems.

the project look like this:

arduino PWM -> low pass filter -> amplifier -> stepper motor -> encoder -> arduino

Problems:

  1. parameters of the resistor and capacitor in the filter.
  2. I don't know which amplifier to choose.
  3. PWM signal is from 0V to 5 V. for a stepper motor, the signal must have negative polarity to rotate. How to do it negative polarity?

Maybe you have some other ideas how to check how the stepper motor reacts to different signals

I will be very grateful for any help given.

Thank you very much. Best wishes.

2

IIRC there were a couple of quite recent posts about sine waves etc. and use with motors / steppers.

There is also the SEARCH option at the upper right of the screen to see if anyone else has already done something similar.

Bob.

3

At his point you have more then a few problems. This sounds like a school project where some how you missed the information you needed, my answer reflects that. In order to pick the amplifier you need to read the motor specifications and amplifier specifications then get an amplifier that will supply them to the motor. It would much more cost effective to purchase an arbitrary function generator then create the signals you are talking about in a pure enough form so you can get valid results. ballscrewbob has given you an assignment, as have I so we can help you. This response is to help you get started in solving your problem, not solve it for you.
Good Luck & Have Fun!
Gil

4

Hi,

thanks for the replys. I have change some things in my project. im using arduino due DAC output now to generate the signals i want. Next i want to build an analog H bridge but dont know nothing about it. How to even start with this, witch parts to use. I will be very grateful for any help.