Small engraver - self contained, no pc?
I'm in a class where we have to build a project, and I want to build a small rotary engraver that can do 10 digit phone numbers on the back of a rabies tag for my dad's vet clinic.
I don't want it to have a pc attached to it, I would like to do a microcontroller. I have a little experience with basic stamps, but thats about it.
I think I can handle the hardware part of the engraver, but I'm not sure how to do the software. It seems like it would be easy to use gcode for the digits, but I'm not sure how to connect all that to stepper controllers.
Does anyone know of a good place to learn about stepper controllers?
What are everyone's thoughts on this?
Progress update and questions
We've got the mechanical system designed. We went with a plasma cut plate steel frame with tabs that interlock to assemble before welding. We're going to machine several fine adjustement blocks for the guide rails and motor mounts. I'll post some screenshots and pics as soon as I can, I don't have a way to open the solidworks files at home.
Question:
I pulled some nema 17 motors from a photocopier and plan on using them for this project. here are their specs.
x & y 2 identical motors
shinano kenshi stp-42d208
1.8 deg/step 2.6v 1.2a
z
shinano kensi stp-42d204
1.8 deg/step 3.15v 0.7a
what do you guys recommend for drive chips? I sent an email to hobbycnc, but nothing yet. Also, can I run these at a higher voltage, say 18 or 24 volts? 12 would probably be enough, but I tested their holding torque at 5v and it wasn't very much.