Hi all,
it's quite a lot I' m thinking to cnc my micromill, and I was searching for a DIY solution.
I've read all the looong thread talking about
http://webpages.charter.net/pminmo/cncelectronics.htm docs, but a lot of things are yet obscure to me, so I write it down here, asking for confirmation, and leaving this thread for those like me, which are (yet) far from CNC and electronics (and also don't understand well english).
My understanding from those circuits are:
1) tachus42's 3 Channel Discrete Unipolar Board :
This board can be connected directly to PC from the DB25 connector, and to UNIPOLAR motors from the S2-S7 connectors, and is not optoisolated thus don't prevent damages to parallel port in case of some shortcircuits or other problems on the board.
Questions:
1) How the motors should be wired, being that an unipolar motor has 6 wires and the connector for each direction are only four ?
2) Am I right in my understanding ?
3) Can some one post the DRC file as when I import it in eagle the DRC fails showing some clearance errors ?
2) tachus42's 3 Axis Chopper Adapter For the above Unipolar Driver:
Can't absolutelly image what a Chopper is ....
3) Plain DB25 (Break Out Board):
A Break Out Board is a board that connects to pc, and can be connected either to an unipolar than to a bipolar driver to drive those ind of motors
4) Compatable 3 Axis DB25 to Single Axis Boards Interface Board (Break Out Board):
Can't absolutelly image what this is ....
5) Unipolar Discrete:
This is a driver for unipolar motors, that can be connected to a BOB, and has only discrete components.
6) Allegro 3977 / L297/L298 board compatable and interchangable with this set :
Those are drivers for bipolar motors, that can be connected to a BOB using differents chipset to drive the motors.
7) 5804 board based on original prototype but compatable with this set :
This is a driver for unipolar motors, that can be connected to a BOB, and has a chipset specific to drive the motors.
8) Opto Isoloated Break Out Board:
This Break Out Board is a board that connects to pc, and can be connected either to an unipolar than to a bipolar driver to drive those ind of motors, and is optoisolated to prevent damages to PC.
At this point, If my understanding are right, to start with my unipolar motors I will need :
1) tachus42's 3 Channel Discrete Unipolar Board, three motors, and nothing more, or
2) A BOB ( optoisolated or not ) and 1 to 3 Unipolar Discrete or 5804 board
Are my understanding right ?
Thanks in advance
Pigi