I Agree! For the same reason seeing windows MACH3 hang and the USB smooth stepper continue to send out stepping pulses on the Z throwing the machine alignment out as it pushes against the table. (router bit not turning and didn't break).
An ESTOP and limits have to be part of the hardware interface side of the equation. And there has to be enough intelligence to let the trajectory planner know what has happened. Even with as simple a feature as a remote feed hold button. One can't just send large blocks of motion information to the target hardware and then tap feed hold and wait for 30 seconds worth of queued motion to play out. By the same token the graphic display and trajectory planner needs to know when the hardware did actually stop so it can rewind back to that point and start again. So it's a tightly coupled closed loop control. All currently done on one computer with access to both sets of data structures for motion commands and motion implementation. But the future _is_ separate drive and interface. When I have some time I'll look further into this. John > -----Original Message----- > From: Mark Wendt [mailto:wendt.m...@gmail.com] > Sent: September-22-15 2:47 AM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Porting LinuxCNC(EMC) to Windows was CAD/CAM > for LinuxCNC > > > On Tue, Sep 22, 2015 at 3:45 AM, Gregg Eshelman <g_ala...@yahoo.com> > wrote: > > > The trick is to achieve transparency of operation so that GCODE and > > commands for start, stop, E-stop etc sent to the LCNC server and > > feedback returned to the client operates seamlessly and without > > interference with the micro-system actually operating the CNC machine. > > That. > > That's the biggest concern I have for a heavy machine, spinning sharp > objects, and whoops! The wireless went down. Or the wired switch > decided to take a dump. > > Those reasons are why I don't use wireless or bluetooth keyboards, > mice and pendants. A hard wire connect to a single computer running > the code to me is just the safest way of doing things. Drip feed by > DNC is okay, that's a horse of a different course. > > Mark > > -- > One Man, One Machine, One Computer! <VBSEG> > > ---------------------------------------------------------------------------- -- > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
