2009/12/2 Martin Pinkston <[email protected]>: > The bidirectional breakout board (C10) from CNC4PC.com was suggested and I > would just like a little confirmation that this should make the interface > between my pc and the steppers control boards.
It ought to, but might actually be more than you need. You could just point-to-point wire a 25-way D-Sub for the Parallel Port to a 26 way header for the controller. (+5V - 1.2V ) / 330 gives you the current through each opto-isolator, and that is about 12mA which most parallel ports should be able to sink. (1.2V is a guess at the voltage drop across the opto-isolator). It isn't clear if CPUVCC is an input or an output. If it is an output then that goes to all of the PWR pins, CPUGND goes to one of the many ground pins on the P-Port and you are there. If it is an input then presumably you have a 5V power supply somewhere? You will probably need to invert all the pulse pins in Stepconf. The optos pass current when a p-port pin goes low, that turns on the LED, which in turn sends a pulse to the opto-output. -- atp ------------------------------------------------------------------------------ Join us December 9, 2009 for the Red Hat Virtual Experience, a free event focused on virtualization and cloud computing. Attend in-depth sessions from your desk. Your couch. Anywhere. http://p.sf.net/sfu/redhat-sfdev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
