The 7I80, and 7I49 are symmetrical, they are both 4" x 4", but the 7I70 and 7I71 are not, and those are the more critical ones to have orientated this way. 48 number 16 MTW wires routed to each of these boards would look like crap with the board 90 degrees off.
Thanks Rick ------ Original Message ------ From: emc-users-requ...@lists.sourceforge.net To: emc-users@lists.sourceforge.net Sent: 11/20/2014 12:25:30 PM Subject: Emc-users Digest, Vol 103, Issue 56 >Send Emc-users mailing list submissions to > emc-users@lists.sourceforge.net > >To subscribe or unsubscribe via the World Wide Web, visit > https://lists.sourceforge.net/lists/listinfo/emc-users >or, via email, send a message with subject or body 'help' to > emc-users-requ...@lists.sourceforge.net > >You can reach the person managing the list at > emc-users-ow...@lists.sourceforge.net > >When replying, please edit your Subject line so it is more specific >than "Re: Contents of Emc-users digest..." > > >Today's Topics: > > 1. Re: Screw Mapping (Mark Wendt) > 2. Re: Motor Resolvers (Marius Liebenberg) > 3. Re: Screw Mapping (Gene Heskett) > 4. Re: i guess i need a new motherboard for new linuxcnc > (Peter C. Wallace) > 5. Re: i guess i need a new motherboard for new linuxcnc (andy pugh) > 6. Re: Latest Linux Build (Marius Liebenberg) > 7. Re: i guess i need a new motherboard for new linuxcnc > (Peter C. Wallace) > 8. Re: Motor Resolvers (andy pugh) > > >---------------------------------------------------------------------- > >Message: 1 >Date: Thu, 20 Nov 2014 08:41:59 -0500 >From: Mark Wendt <wendt.m...@gmail.com> >Subject: Re: [Emc-users] Screw Mapping >To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> >Message-ID: > <cabwwdmpghdsg3jmsyfsgkwaega6oxnzgjl4ukxsl0zjclfy...@mail.gmail.com> >Content-Type: text/plain; charset=UTF-8 > >On Thu, Nov 20, 2014 at 8:25 AM, andy pugh <bodge...@gmail.com> wrote: > >> On 20 November 2014 13:07, Mark Wendt <wendt.m...@gmail.com> wrote: >> >> >> Using 16 I get >> >> http://ibin.co/1htLwap6mz37 >> >> > Ah ha! Thanks for that. Appreciate the help Andy! >> >> Actually, you can do better than that. Because Lincurve doesn't >> extrapolate you can drop the (0,0) point and add a (7,0) point to >>make >> the fit better. >> >> -- >> atp >> If you can't fix it, you don't own it. >> http://www.ifixit.com/Manifesto >> > > >Thanks! I'll take a look at that too. > >Mark > > >------------------------------ > >Message: 2 >Date: Thu, 20 Nov 2014 16:29:51 +0200 >From: Marius Liebenberg <mar...@mastercut.co.za> >Subject: Re: [Emc-users] Motor Resolvers >To: emc-users@lists.sourceforge.net >Message-ID: <546dfadf.7040...@mastercut.co.za> >Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > >On 2014-11-18 20:28, andy pugh wrote: >> On 18 November 2014 17:33, Kirk Wallace <kwall...@wallacecompany.com> >>wrote: >>> The more I think about it, adding Halls seems to be the way to go. >> Resolvers are _really_ good transducers. It seems a shame not to use >>them. >> >> I have no boards left. But I can pass on the files to have a batch of >> PCBs made ($10 for 10 boards at seeedstudio.com ) >> >> The results were disappointing for position feedback, but sending 3 >> emulated Hall signals from Arduino GPIO and nothing else ought to >>work >> pretty well. Each Arduino does 3 motors. >Andy why were you disappointed with the position feedback. >Will it be ok on a slow moving bed? >Do you think a more powerful MCU will do the trick? > > >-- > >Regards /Groete > >Marius D. Liebenberg >+27 82 698 3251 >+27 12 743 6064 >QQ 1767394877 > > > > >------------------------------ > >Message: 3 >Date: Thu, 20 Nov 2014 11:33:45 -0500 >From: Gene Heskett <ghesk...@wdtv.com> >Subject: Re: [Emc-users] Screw Mapping >To: emc-users@lists.sourceforge.net >Message-ID: <201411201133.45148.ghesk...@wdtv.com> >Content-Type: Text/Plain; charset="windows-1256" > >On Thursday 20 November 2014 06:47:41 Mark Wendt did opine >And Gene did reply: >> On Thu, Nov 20, 2014 at 6:38 AM, andy pugh <bodge...@gmail.com> >>wrote: >> > >>https://docs.google.com/spreadsheets/d/1ovcg0THudgyONfH508BG4_mzOxfuD >> > 3Od7SsPfnqxXBg/edit#gid=740055151 >> > >> > > Whatcha think? Easy enough to do? >> > >> > Looks like you should get a nice fit with 14 points. >> > >> > >> > -- >> > atp >> > If you can't fix it, you don't own it. >> > http://www.ifixit.com/Manifesto >> >> Andy, >> >> How would you fit it into 14 points? I seem to come up with quite a >> few more points than 14. >> >> Mark > >Pick your most + point, and your most - point, plus the start point and >end points, and apply that correction to those 4 points only using >lincurve & offset. > >Measure it again. How much error is there now? And where? > >Pick the next pair of maximum errors, and where you are inserting >between >previous points, slide the higher points one x#y# pigeon hole up to >make >room for the in-between point. Pretty soon you'll be trying to >compensate >for the room temp variations, and I doubt you would need more than 10 >of >the 16 settings the default build of the module provides. > >Actually, if I was doing it, I think I'd start at zero, move up the >rails >until you hit the first thousandth error. Set lincurves x1 and y1. >Measure to the next place you find a thou error, set x2y2 to fix that. > >Repeat till you are at the other end of the rails. and I doubt you >would >need more than 10 of the correction points you have. And in any stretch >of the rails where you seem to be fixing a straight line where the xN >and >xn+2 passes thru the point between them, the one in the middle can be >deleted by putting the x4y4 values into the x3y3 box. >> >>----------------------------------------------------------------------- >> ------- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT >> Server from Actuate! Instantly Supercharge Your Business Reports and >> Dashboards with Interactivity, Sharing, Native Excel Exports, App >> Integration & more Get technology previously reserved for >> billion-dollar corporations, FREE >> >>http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg. >> clktrk _______________________________________________ >> 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) >Genes Web page <http://geneslinuxbox.net:6309/gene> >US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS > > > >------------------------------ > >Message: 4 >Date: Thu, 20 Nov 2014 08:37:39 -0800 (PST) >From: "Peter C. Wallace" <p...@mesanet.com> >Subject: Re: [Emc-users] i guess i need a new motherboard for new > linuxcnc >To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> >Message-ID: <pine.neb.4.64.1411200815520.18...@freeby.mesanet.com> >Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed > >On Thu, 20 Nov 2014, kqt4a...@gmail.com wrote: > >> Date: Thu, 20 Nov 2014 05:39:17 -0600 (CST) >> From: kqt4a...@gmail.com >> Reply-To: "Enhanced Machine Controller (EMC)" >> <emc-users@lists.sourceforge.net> >> To: "Enhanced Machine Controller (EMC)" >><emc-users@lists.sourceforge.net> >> Subject: Re: [Emc-users] i guess i need a new motherboard for new >>linuxcnc >> >> On Wed, 19 Nov 2014, Peter C. Wallace wrote: >> >>> On Wed, 19 Nov 2014, kqt4a...@gmail.com wrote: >>> >>>> Date: Wed, 19 Nov 2014 13:52:36 -0600 (CST) >>>> From: kqt4a...@gmail.com >>>> Reply-To: "Enhanced Machine Controller (EMC)" >>>> <emc-users@lists.sourceforge.net> >>>> To: emc-users@lists.sourceforge.net >>>> Subject: [Emc-users] i guess i need a new motherboard for new >>>>linuxcnc >>>> >>>> Can you all recommend a basic motherboard that is know to work with >>>> LinuxCNC running a parallel controller? Thanks. >>>> >>>> Richard >>> >>> The J1800,J1900,J2900 based motherboards work well with the latest >>>Wheezy ISO >>> (these are fanless, relatively fast (2x Atom) and low latency) >>> >> >> >> Is this what you are talking about, is 2 GB of memory enough >> >> >>http://www.newegg.com/Product/Product.aspx?Item=N82E16813132104&cm_re=j1800-_-13-132-104-_-Product >> > >Thats one of the many J1800,J1900,J2900 motherboards that have >displaced the >older D525 and D2550,D2800 based motherboards in the low power X86 >range > >2G is fine for linuxcnc > >This AMD MB is also OK > >http://www.newegg.com/Product/Product.aspx?Item=N82E16813138412&cm_re=biostar_a4-5000-_-13-138-412-_-Product > > >Not sure how its latency compares (it has a LPT header, no back panel >LPT >port) > >> >> >>------------------------------------------------------------------------------ >> Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server >> from Actuate! Instantly Supercharge Your Business Reports and >>Dashboards >> with Interactivity, Sharing, Native Excel Exports, App Integration & >>more >> Get technology previously reserved for billion-dollar corporations, >>FREE >> >>http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > >Peter Wallace >Mesa Electronics > >(\__/) >(='.'=) This is Bunny. Copy and paste bunny into your >(")_(") signature to help him gain world domination. > > > > >------------------------------ > >Message: 5 >Date: Thu, 20 Nov 2014 16:50:23 +0000 >From: andy pugh <bodge...@gmail.com> >Subject: Re: [Emc-users] i guess i need a new motherboard for new > linuxcnc >To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> >Message-ID: > <CAN1+YZXx1cDL5mQUam21qyT6vU8LKgeVg5ubC=o_ydxic9-...@mail.gmail.com> >Content-Type: text/plain; charset=UTF-8 > >On 20 November 2014 16:37, Peter C. Wallace <p...@mesanet.com> wrote: > >> Thats one of the many J1800,J1900,J2900 motherboards that have >>displaced the >> older D525 and D2550,D2800 based motherboards in the low power X86 >>range > >I wonder if this one would be any good? It looks like single 12V >power, which is a big plus. >http://www.newegg.com/Product/Product.aspx?Item=N82E16813157495 > >I think I see a parallel port header. > >-- >atp >If you can't fix it, you don't own it. >http://www.ifixit.com/Manifesto > > > >------------------------------ > >Message: 6 >Date: Thu, 20 Nov 2014 18:51:19 +0200 >From: Marius Liebenberg <mar...@mastercut.co.za> >Subject: Re: [Emc-users] Latest Linux Build >To: emc-users@lists.sourceforge.net >Message-ID: <546e1c07.8080...@mastercut.co.za> >Content-Type: text/plain; charset=ISO-8859-1; format=flowed > >Rick >I just looked at the 7i80 and it looks like the holes are symmetrical >so >you could mount it any way round I think. > >On 2014-11-19 14:02, Rick Lair wrote: >> I would rather use the din rail mounts, but they are orientated 90 >> degrees off of how I mount the boards, or so it looks like on the >>mesa >> web page. >> >> >> Thanks >> >> >> Rick >> >> >> >> >> >>------------------------------------------------------------------------------ >> Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server >> from Actuate! Instantly Supercharge Your Business Reports and >>Dashboards >> with Interactivity, Sharing, Native Excel Exports, App Integration & >>more >> Get technology previously reserved for billion-dollar corporations, >>FREE >> >>http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > >-- > >Regards /Groete > >Marius D. Liebenberg >+27 82 698 3251 >+27 12 743 6064 >QQ 1767394877 > > > > >------------------------------ > >Message: 7 >Date: Thu, 20 Nov 2014 08:55:28 -0800 (PST) >From: "Peter C. Wallace" <p...@mesanet.com> >Subject: Re: [Emc-users] i guess i need a new motherboard for new > linuxcnc >To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> >Message-ID: <pine.neb.4.64.1411200854350.18...@freeby.mesanet.com> >Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed > >On Thu, 20 Nov 2014, andy pugh wrote: > >> Date: Thu, 20 Nov 2014 16:50:23 +0000 >> From: andy pugh <bodge...@gmail.com> >> Reply-To: "Enhanced Machine Controller (EMC)" >> <emc-users@lists.sourceforge.net> >> To: "Enhanced Machine Controller (EMC)" >><emc-users@lists.sourceforge.net> >> Subject: Re: [Emc-users] i guess i need a new motherboard for new >>linuxcnc >> >> On 20 November 2014 16:37, Peter C. Wallace <p...@mesanet.com> wrote: >> >>> Thats one of the many J1800,J1900,J2900 motherboards that have >>>displaced the >>> older D525 and D2550,D2800 based motherboards in the low power X86 >>>range >> >> I wonder if this one would be any good? It looks like single 12V >> power, which is a big plus. >> http://www.newegg.com/Product/Product.aspx?Item=N82E16813157495 >> >> I think I see a parallel port header. >> >> -- >> atp >> If you can't fix it, you don't own it. >> http://www.ifixit.com/Manifesto >> > > >Yep, if you zoom in you can see a 26 pin header labeled "LPT1" > > >> >>------------------------------------------------------------------------------ >> Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server >> from Actuate! Instantly Supercharge Your Business Reports and >>Dashboards >> with Interactivity, Sharing, Native Excel Exports, App Integration & >>more >> Get technology previously reserved for billion-dollar corporations, >>FREE >> >>http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > >Peter Wallace >Mesa Electronics > >(\__/) >(='.'=) This is Bunny. Copy and paste bunny into your >(")_(") signature to help him gain world domination. > > > > >------------------------------ > >Message: 8 >Date: Thu, 20 Nov 2014 17:25:01 +0000 >From: andy pugh <bodge...@gmail.com> >Subject: Re: [Emc-users] Motor Resolvers >To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> >Message-ID: > <can1+yzwcc9dmqy+tq_so+hngsy594nnmra22iyv2yq6hdox...@mail.gmail.com> >Content-Type: text/plain; charset=UTF-8 > >On 20 November 2014 14:29, Marius Liebenberg <mar...@mastercut.co.za> >wrote: >> Andy why were you disappointed with the position feedback. >> Will it be ok on a slow moving bed? >> Do you think a more powerful MCU will do the trick? > >It was noisy and dithered a lot. The Arduino has to measure 2 voltages >per measurement. To do it fast enough it had to be only 8 bits and the >shortest sample time that the Arduino could handle. Even then the >carrier was only 1kHz, whereas Resolvers normally work at at least >5kHz. > >So, two noisy values divided by each other = a very noisy result, >which gives a noisy arctan and a lot of servo dither. > >Yes, a more powerful MCU would be better, and it so happens that Mesa >and Pico sell exactly that all ready to go. > >Why will nobody believe me when I say that my experiment was rubbish? > >-- >atp >If you can't fix it, you don't own it. >http://www.ifixit.com/Manifesto > > > >------------------------------ > >------------------------------------------------------------------------------ >Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server >from Actuate! Instantly Supercharge Your Business Reports and >Dashboards >with Interactivity, Sharing, Native Excel Exports, App Integration & >more >Get technology previously reserved for billion-dollar corporations, >FREE >http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk > >------------------------------ > >_______________________________________________ >Emc-users mailing list >Emc-users@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/emc-users > > >End of Emc-users Digest, Vol 103, Issue 56 >****************************************** ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
