Hello, One potential issue I see with your circuit design is that it doesn't seem to have io inputs to allow use of encoders on all axis's which would greatly enhance accuracy and repeatability for movements and actions. Homing works for startup and such but it doesn't track potential movement and positioning errors. ie http://www.anaheimautomation.com/manuals/forms/encoder-guide.php#sthash.U7z4xbhg.dpbs
Regards, Kevin On Thursday, September 27, 2018 at 9:36:55 PM UTC-5, Lang Gu wrote: > > Hello, everyone . > I'm new drawing a cnc cape sch.. > It‘s with 19 Optocoupler isolation INPUT(11 INPUT use for MPG ,) and 16 > Non-Isolated > <http://www.baidu.com/link?url=BNsib2kq5dU8yQ3jhUW_wDiqwNZxNq5P7JzjPDx1rfcoNPFdszJvZ8zLIqiWuH-7Woivxv5a-paqfa5Ui_Y1sK5dGrImqKKsL1UuBvKD_I_> > OUTPUT > (use 74ls244 ) > I use mcp23017 i2c bus for 16 input(for limit --max/min/home etc.).. > > BUT， I'm not a electronic engineer > <http://www.baidu.com/link?url=saoUwpWVqX9fqxwvTEnna5vS05zf8DhiAKldVez8q5GHfCz1Szl3t9cDThxi9fsGefvPnwieq1CNXvScUhbFfzhG9rRPyDiZA9OtahQhDDybCFnRhdzZVUGuv986kLeU> > ，so Dare not confirm right。。 > Hope electronic engineer proofreading. > -- 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 [email protected]. Visit this group at https://groups.google.com/group/machinekit. For more options, visit https://groups.google.com/d/optout.
