This
week I
made the hello stepper board.
I’m having problems with the board, to burn it the boot loader. The problem is that my PC donīt recognize the board, I have checked all the connections, The power supply is Ok, the voltage regulator works well, and the FabISP also works, because I have tried it with other boards and everything is Ok.
Today I will change the ATtiny44 for another new one, After try a lot of things, the only idea I have now it’s that the ATtiny44 was damaged during soldering and don’t work properly, so, I will change it and try it again. I will update the site with the new advances.
I used this wiring schematic extracted for the stepper datasheet to make a connection wire between board and motor with the correct coils sequence.
I have compiled the hello stepper C code in arduino IDE without problems, but I canīt test it with the motor in the board until I burn the boot loader on the chip.
This is the C code I want to use, and I can compile under arduino IDE
A couple of weeks ago, I’m testing some stepper to my future RepRap 3Dprinter, I controlled it with a sanguinololu, an open hardware board to control CNC machines.
Here you can see the schematics of the board I used. It's based on ATmega 644 and use the chip A4988 as motor driver.
Look in the center of the image that the brain of the board is the ATmega 644, and in the right part of the image, you san see the motor drivers, based on A4988 power chip.
In this other image I show you how to connect the three different motors to the board, and how to powered it. To power the board, I used a 12VDC PC power supply (note to use 12VDC wires and not 5VDC ones)
For the connection of the motors as in the image of the top steeper, you must locate the motor coils and connected correctly
In the video you can see three stepper motor running and playing the Star Wars Imperial March. The sound is not very good, so TURN UP THE VOLUME, and click PLAY
Imperial March played on nema17 motors from R.Ferrero on Vimeo.
May the Force be will you…
If you want to test the Imperial March on your RepRap or CNC maquine, here you can download de G code of the Imperial March
Greetings
from Leon, have a nice week