> On Mar 30, 2016, at 23:12, Jon Elson <el...@pico-systems.com> wrote: > > Hello, > > I have a customer who bought one of my Universal Stepper > Controllers, that uses the EPP mode on the parallel port for > communication. He is not getting any response from the > board.
My experience with an add-in EPP port card was that its output drive voltage was too low to trigger the motor controller it was connected to. IIRC, I measured the cards active high output voltage as 3.12v (or so). OTOH, the motor driver had a minimum threshold of 3.3v and was not being triggered by the card. Apparently this is a fairly common characteristic of cheap add-in parallel port cards. BobS ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785471&iu=/4140 _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
