Microstepper controller

[aratti]

I have been thinking for a while, how to put togeter a simple microstepper controller without using a ready made commercial driver.
At the end, I came up with this simple project capable to drive unipolar stepper motor in three different modes

FULL STEP

HALF STEP

MICRO STEP

The Pic micro used in this work is a Pic 16F628 a powerfull small micro with PWM capability. With this MCU plus a 74HC04 and a74HC86 the controller will produce 20 microsteps out of a nominal motor step.

An additional improvement of this controller, is the capability to accept travel commands of 24 Bits, wich gives to the user the possibility to send positioning profile of over 16 millions steps.

Controller accept commands via TTL serial port @ 9600,n,8,1 and return an (Ack) once the positioning profile has been completed.

Download the zipped file which contains schematic + software + user manual

Enjoy

Al.

[fizyxman]

Thanks -
I loved your stepper project, and this just as helpful. My students are very motivated by projects with possible robotic uses.

Thanks again - Fiz

[Bruce]

Fiz,

Check out our Micro-Bot projects section; http://web.archive.org/web/201301160...-Bot/index.htm

If your ship to address is a school, I'll send you a couple of our Micro-Bot circuit
boards - with a few additional components for experiments - gratis.

[aratti]

Thank you Fiz, you are welcome.

Al.

[El_AMPo]

Seems like a nice way of driving steppers, really a clever solution with gate logic.
(long live gates, gates are[n't] dead)

One question:

The hex file included is version compatible with the 16F628A?

Just asking because sometimes compiled hexs for different versions just don't work

[aratti]

The hex file included is version compatible with the 16F628A?

You should have no problem.

Cheers

Al.

[Galder02]

Hello there, im interested in designing as microstepper controller via a pic, using everything that its needed (as i have been investigating, it uses pwm and other functions). The thing is that the only programming language i know well is picbasic pro. is it possible to do such thing with this compiler?, lets say using a pic like 16f877a or a 18fxx?, can somebody help me out with a code in this language?, tis for controlling a bipolar stepper motor. i only want to know how it works and undersand it because i dont have it very clear, and of course in basic language.

Thanks everybody, Regards.