Yeah I caught that after I posted. I think I corrected that in the next posting. Thanks for bringing that to everyone's attention though. So easy nowadays to get snagged. Must be vigilent. John
> -----Original Message----- > From: Groups [mailto:gro...@homanndesigns.com] > Sent: August 6, 2023 6:43 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Beaglebone black latency > > Hi John, > Not really. That $100 is for the pendant only. The 3 axis controller is around > $550. > > A lot of AliExpress sellers now add multiple products to a single listing. > They > have a relatively cheap item there that makes the item you are after appear > cheap. > > That said you can get a similar 2 axis Chinese controller for about 1/3 that > price. > > Cheers > > Peter Homann - (from my mobile) > http://www.homanndesigns.com > > > On 6 Aug 2023, at 5:17 am, gene heskett <ghesk...@shentel.net> wrote: > > > > ?On 8/5/23 14:45, Martin Dobbins wrote: > >> It makes me wonder which operating system they put on that Chinese > controller, and what motion control system. > >> Martin > >> ________________________________ > >> From: John Dammeyer > >> Sent: Friday, August 4, 2023 7:41 PM > >> To: 'Enhanced Machine Controller (EMC)' <emc- > us...@lists.sourceforge.net> > >> Subject: Re: [Emc-users] Beaglebone black latency > >> My biggest issue with the Xylotex BBB Cape for CNC was that the logic for > ESTOP was inverted. ESTOP was a N/O switch so if a wire was broken you > wouldn't find out until you tried to save a body part from being injured with > the ESTOP. > >> But back when a BBB was around $50 and a cape around $25 you had a 3 > axis system. Obviously a break out board of some sort was needed but that's > true for MESA or any other type of interface just like motors and switches > are needed too. > >> The nice thing about these small systems with a small HDMI screen is that > they don't overwhelm the space taken by a small lathe like a 7x12 or Unimat > DB200. I don't want a full size screen, mouse and keyboard plus a PC clone > for my DB-200 which looks a lot like this one. > >> > https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fi.redd. > it%2F83lxxjam0yj71.jpg&data=05%7C01%7C%7Cdec28113c0d745ae7e5d08db > 954d6546%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C6382679318 > 83275463%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoi > V2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=l0 > 4m1ookT8TmrWx%2F8azPP2X2qqAyxgSJbezUEI7EZJM%3D&reserved=0<htt > ps://i.redd.it/83lxxjam0yj71.jpg> > >> For $100 Cdn free shipping I can get a Chinese Controller. > >> > https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww. > aliexpress.com%2Fitem%2F1005005195839565.html&data=05%7C01%7C%7C > dec28113c0d745ae7e5d08db954d6546%7C84df9e7fe9f640afb435aaaaaaaaaaa > a%7C1%7C0%7C638267931883275463%7CUnknown%7CTWFpbGZsb3d8eyJWI > joiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3 > 000%7C%7C%7C&sdata=O3eRaBFYdAVqxPxwCTL9JCUiFaYmhWTcGtwJKa%2 > BJFT4%3D&reserved=0<https://www.aliexpress.com/item/100500519583956 > 5.html> > >> But I'd rather have a Linux based system or my ELS. > >> John > >>> -----Original Message----- > >>> From: Chris Albertson [mailto:albertson.ch...@gmail.com] > >>> Sent: August 4, 2023 5:20 PM > >>> To: Enhanced Machine Controller (EMC) > >>> Subject: Re: [Emc-users] Beaglebone black latency > >>> > >>> I think the BBB was popular because of the twp PRUs. These are > >>> programmable processors that are separate from the CPU. So you can > get > >>> very accurate real-time pulses out even with poor latency under Linux. > >>> > >>> However, this does require programming the PRUs. Machinekit had a > HAL > >>> unit for the PRUs. I don?t know if LinuxCNC has this or not. > >>> > >>> > >>> > >>> > >>>> On Aug 4, 2023, at 11:18 AM, andy pugh <bodge...@gmail.com> > wrote: > >>>> > >>>> On Fri, 4 Aug 2023 at 01:48, alanmthomason--- via Emc-users > >>>> <emc-users@lists.sourceforge.net> wrote: > >>>>> > >>>>> Hi There.I'm trying to work through setting up linuxcnc on a > beaglebone > >>>>> black. I've run the latency-test, with results that are not looking > >>>>> good.has anyone else run this test with a Beaglebone black? Is there > any > >>>>> way to improve results. > >>>> > >>>> I think that when Machinekit were fond of the Beaglebone they > tended > >>>> to run it headless. I can't recall whether that was just poor graphics > >>>> performance in general, or whether it was due to latency issues. > >>>> > >>>> You could try installing the (old) Machinekit image to see if the > >>>> latency with that kernel is better. > >>>> > >>>> -- > >>>> atp > >>>> "A motorcycle is a bicycle with a pandemonium attachment and is > >>>> designed for the especial use of mechanical geniuses, daredevils and > >>>> lunatics." > >>>> ? George Fitch, Atlanta Constitution Newspaper, 1912 > >>>> > >>>> > >>>> _______________________________________________ > >>>> Emc-users mailing list > >>>> Emc-users@lists.sourceforge.net > >>>> > https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.so > urceforge.net%2Flists%2Flistinfo%2Femc- > users&data=05%7C01%7C%7Cdec28113c0d745ae7e5d08db954d6546%7C84df > 9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638267931883275463%7CUnkn > own%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik > 1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=qTWdux60ZVNVGu5 > 00hGv5nTpLIMlYDdL3Zs26yr6p%2Bc%3D&reserved=0<https://lists.sourcefor > ge.net/lists/listinfo/emc-users> > >>> > >>> > >>> > >>> _______________________________________________ > >>> Emc-users mailing list > >>> Emc-users@lists.sourceforge.net > >>> > https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.so > urceforge.net%2Flists%2Flistinfo%2Femc- > users&data=05%7C01%7C%7Cdec28113c0d745ae7e5d08db954d6546%7C84df > 9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638267931883275463%7CUnkn > own%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik > 1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=qTWdux60ZVNVGu5 > 00hGv5nTpLIMlYDdL3Zs26yr6p%2Bc%3D&reserved=0<https://lists.sourcefor > ge.net/lists/listinfo/emc-users> > >> _______________________________________________ > >> Emc-users mailing list > >> Emc-users@lists.sourceforge.net > >> > https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.so > urceforge.net%2Flists%2Flistinfo%2Femc- > users&data=05%7C01%7C%7Cdec28113c0d745ae7e5d08db954d6546%7C84df > 9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638267931883275463%7CUnkn > own%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik > 1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=qTWdux60ZVNVGu5 > 00hGv5nTpLIMlYDdL3Zs26yr6p%2Bc%3D&reserved=0<https://lists.sourcefor > ge.net/lists/listinfo/emc-users> > > This one runs at 1/4 of the speed of a std linuxcnc install. I'd skip it > > and its > ilk. Not fast enough. > >> _______________________________________________ > >> Emc-users mailing list > >> Emc-users@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/emc-users > > > > Cheers, Gene Heskett. > > -- > > "There are four boxes to be used in defense of liberty: > > soap, ballot, jury, and ammo. Please use in that order." > > -Ed Howdershelt (Author, 1940) > > If we desire respect for the law, we must first make the law respectable. > > - Louis D. Brandeis > > Genes Web page <http://geneslinuxbox.net:6309/> > > > > > > > > _______________________________________________ > > 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 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
