Hi,kevin, closed loop or semi-closed loop is hard for me. So I chose the easy way---use open loop. Thanks for your advice,this is very helpful for my future.
在 2018年9月28日星期五 UTC+8下午10:13:44，Kevin Friesth写道： > > 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 machinekit+unsubscr...@googlegroups.com. Visit this group at https://groups.google.com/group/machinekit. For more options, visit https://groups.google.com/d/optout.
