I have a MPG on my ELS for the lathe and a ShuttleExpress for the MACH3 on the CNC router. I too wouldn't be without some sort of MPG. Response time on the 40MHz PIC is instant. I also find the ShuttlePro and keyboard buttons response for jogging essentially instant on MACH3.
Jogging MachineKit on the BBB is a joke with the path screen displayed. I don't think it should be so I'll bring this up on the MachineKit for Beagle forum. There's probably a parameter somewhere that fixes it. A single step button click for 0.01 move shoots the processor activity up to 100% OTOH, go to the DRO screen (no tool path) and the keyboard feels like it's attached to the stepper with instant jogging more like a 1.16GHz Athlon PC 1GB RAM that is displaying tool path. Beagle Processor Activity bar drops to 50% or less. If I were to draw a conclusion I'd say the overhead of screen updating is a killer for the Beagle MachineKit. I read that AXIS is written in Python. An pseudo real time application I did a few months ago using Python on a Pi3 was quickly moved to C after we found the interpreted Python just couldn't keep up. But again, I don't know what's happening under the covers. John > -----Original Message----- > From: Jon Elson [mailto:el...@pico-systems.com] > Sent: October-10-17 9:13 AM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] MachineKit on the BeagleBone Black > > On 10/09/2017 09:00 PM, Frederic RIBLE wrote: > > On 2017-10-10 00:02, Sebastian Kuzminsky wrote: > > > >> I don't know about machinekit, but in linuxcnc > >> incremental jogs are safer than continuous jogs in high > >> latency situations like these. > >> > > Same behavior with machinekit. > > This is one of the motivations I have for adding physical > > jog wheels on my machines. > > > Boy, I'll tell you, once I put a jog dial on my mill, I > would NEVER want to be without it! We have this hideous > Levil thing at work, and you are stuck with a finger pad on > a laptop, and it goes and jogs without command all the time! > I machine to top to clean up a face of a part all the time > with the jog keys on my mill, but step down the Z with the > jog dial. I can count out the clicks on the dial without > looking. Very nice. > > Jon > > ---------------------------------------------------------------------------- -- > 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 ------------------------------------------------------------------------------ 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
