On 8 March 2015 at 22:45, Neil <emc_d...@narwani.org> wrote: > This is how it's wired... > http://orlandorobotbuilders.com/rw/2015-03-08-Elec-01-Wiring.jpg
It isn't clear from that what the signals are referenced to. You appear to only have a single wire from the parport GND to somewhere out-of-shot. Rather than use a separate supply for the opto 5V you could steal 5V from a USB port. (Or from a convenient header on the motherboard) If you take 5V to Opto+ and wire the Opto- to the parport, then invert the sense of the signals in the config then I suspect you might have better results. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
