OK, guys...I need some help. It's time for me to do the electronics side of this project, and it doesn't seem to be working right. Maybe I'm just missing something.
I've tested this board and my motor together (unipolar motor, bipolar mode) and it works just fine...using the on board 555. I need to modify this.
If you'll notice, this board generates its own pulses with a 555 chip. I need to bypass that. (sever the wire feeding the output to the L297?)
I then need to bypass the flip-flop that feeds the direction pin on the L297.
This should be able to be done by severing the output from the 555 (cut the line) and soldering the parallel lines directly on to the chip, right? I'll arrange a more elegant hack later...right now I just want the thing to work.
Anything else that I'm missing... Yeah, one other question. On the parallel cable I'm using pins 2 and 3 for step and direction, as mentioned in the turbocnc.ini file. I'll also need a ground connection -- OK to hook it up to my 5V logic power supply? And, does anything else need to be connected on the parallel port...enable, or busy or one of the other lines?
HELP!
-- Chuck Knight