Γειά σου πατριδα! Από ποιό μέρος του πλανήτη μου γράφεις;
As you said, we have to speak in english so other can undertstand us! I'm about to write down an article about this project, but i can give some details by the way.
This is a CNC Plotter, so that means that it can draw a picture which i "draw" using '0' and '1'. Let me explain that.. The code reads an array, where i placed the image. So, the procedure of reading is scanning the array, bit by bit, and when the bit is 1 the pen is down, otherwise whean the bit is 0, the pen is up. For every bit (even 0 or 1) the motor go 5 steps forward.
About the hardware.. The motors as i said in the first post, are coming from used CD drives. As we know two types of motors are in this part: DC motors or stepper motors. I used the one with the stepper motors. Theese motors are bipolar, give 4 wires output.
To drive the motors i tried mosfet in the first try and l293d ic in the second one. Both are working perfectly, but have in mind that l293d have more heat at 12v.
The up/down of the pen is coming from a device i developed. Pen is up when a micro servo go up and pen is down when this servo is moving down..
The whole construction is coming from an old IKEA rack!
Hope you like it!
(and sorry if my english are not in a good condition