On Tue, 3 Jan 2017 09:40:39 +0700 TJoseph Powderly <tjt...@gmail.com> wrote:
> Nicklas, hello > > > On 01/03/17 04:17, Nicklas Karlsson wrote: > > I made local change to the hostmot2 stepper drivers to both send and > > receive absolute position encoder style. Behaviour could be changed with > > configuration parameter. > do i think correctly ? the stepper gets position commands, not step & dir ? Yes originally, but I made a small change to the driver so I could send absolute values, this was the simlest driver to modify. I only send like lower 16 bits so it will be "encoder style". > > The change is simple but I am still thinking about protocol because with > > interpolated position mode there is a need to set parameters. I read > > Profibus use same protocol on all media but it may be a little bit to > > complex and I do not know about parameters. > does 'interpolated position mode' mean the position commands are delta? > dx dy dz commands No delta, it is absolute values but only 16 bits so it will be like a 16 bit encoder counter. > > CANopen have a dictionary which may be used for parameters and PDOs for > > real time data but I do not know if it is a good idea to use on other > > media. Via TCP/IP telnet may actually be a simple method to implement set > > parameters or a web server but a standard industrial protocol used with > > ordinary configuration tools are probably better. > > > new type drivers using 'standard ... protocols.. . with ordinary > configuration tools' is of benefit to larger non-edm audience Yes I know, it will or are also used for other machines. For EDM feedback is needed but for other machines path is known beforehand and there could also be a small receive FIFO. ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
