On 2/18/2018 6:11 PM, Richard Thornton wrote: > > Should I use the Terasic, also I see the DE0-Nano_DB25, do I need that with > the G540, if I do, is it possible to have the board made up with the > components installed (I was thinking of using jumper wires from the Terasic > directly to a DB25)?
That can work if you don't have any signals over 3.3V. The DE0-Nano_DB25 adapter board has FET based bus translation chips that protect the FPGA from 5V signals. In addition to the 5V protection, you may want or need additional protection on the I/O signals. In a typical setup using Mesa hardware, you have an FPGA board (with built-in 5V protection) connected to an I/O board that provides isolation and additional drive, for example a 5i25 FPGA card and 7i76 daughtercard. The DE0-Nano + the DE0-Nano_DB25 adapter board would be the same as the 5i25. Whether or not you need something like the 7i76 depends on your system, but it's generally not a great idea to connect pins directly tied to the FPGA to long cables winding around a large machine with lots of EMI. You can probably get away with tying the stepper signals directly to the FPGA board but things like limit switches and encoder signals can easily pick up enough EMI to fry the FPGA if you're not careful. > Is my understanding correct, I install machinekit on the Terasic, it's > headless, so I install something else on to a PC with a GUI and use this to > send the gcode to the Terasic? Yes. > I'm thinking I would want a pendant attached to the Terasic, I don't want > to spend more that $100 on this, is there something I can get online that > will work on machinekit? There are a variety of pendents available, and quite a few of them already have HAL components to use them. -- Charles Steinkuehler char...@steinkuehler.net -- website: http://www.machinekit.io blog: http://blog.machinekit.io github: https://github.com/machinekit --- You received this message because you are subscribed to the Google Groups "Machinekit" group. To unsubscribe from this group and stop receiving emails from it, send an email to machinekit+unsubscr...@googlegroups.com. Visit this group at https://groups.google.com/group/machinekit. For more options, visit https://groups.google.com/d/optout.
