In the manual - they say you can 'and' and 'or' and such.. You need a , then the operator.. But I think maybe the limit is 2..
http://linuxcnc.org/docs/stable/html/ladder/classic-ladder.html#_compare - (, ) separate into groups example %IF1=2,&%IF2<5 in pseudo code translates to if %IF1 is equal to 2 and %IF2 is less than 5 then the comparison is true. Note the comma seperating the two groups of comparisions. A broad google search didn't bring up anything.. sam On Tue, Nov 29, 2022 at 9:04 AM Todd Zuercher <to...@pgrahamdunn.com> wrote: > Oh I misunderstood your question. Yes I think a single variable comparison > block is limited to only a single comparison of a variable to one constant > or another variable. I am surprised that it worked with the last two > compares combined into a single block. So for your row of logic below I > would have thought it would require 3 comparison blocks in a row on the > same line. One each for %IW0<%W0, and %IW0>0, and %IW0<7. Are you certain > your logic worked completely, and one or both of the last two were not > ignored. > > Todd Zuercher > P. Graham Dunn Inc. > 630 Henry Street > Dalton, Ohio 44618 > Phone: (330)828-2105ext. 2031 > > -----Original Message----- > From: Sam Sokolik <samco...@gmail.com> > Sent: Monday, November 28, 2022 8:57 PM > To: Enhanced Machine Controller (EMC) <emc-users@lists.sourceforge.net> > Subject: [Emc-users] Classic ladder compare blocks.. > > [EXTERNAL EMAIL] Be sure links are safe. > > It doesn't say anywhere in the linuxcnc manual for classic ladder - but is > there a limit for the compare block to just 2 compares? > ie.. > > I had this in the compare > %IW0<%W0,&%IW0>0,&IW0<7 > For the life of me the logic just wasn't working. > Finally I put it in 2 separate compares.. > %IW0<%W0 in one.. followed by %IW0>0,&IW0<7 > > This worked as expected.. > > BTW - the old emco turret with no feedback should work pretty darn well > with a little ladder logic.. Only 1 output. (logic 0 runs the turret into > the pawl through a current limiting resistor.. logic 1 runs the turret > clockwise to the next tool.) > > > https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DJGGPob1iKj8&data=05%7C01%7Ctoddz%40pgrahamdunn.com%7C0fa3074c034248ba60d508dad1ad2e3a%7C5758544c573f47cebee96c3e0806fb43%7C0%7C0%7C638052838992711450%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=B9AYShdhN79RyUPXJrTdSYeNycxAnDlMyFFgo6mdgDA%3D&reserved=0 > > The original Emco compact 5 CNC, when you would call a tool - say you are > at tool 1 and going to tool 3 - would stop at tool 2 and index. (it stops > at every tool location between the one it was at and the one you called) > > I think this was probably convenience as you need 2 different time delays > - the initial one to go to the next one.. (slightly longer than every > pocket after the first..) I am currently using 2.2 seconds for the first > tool - > 1.8 seconds for every tool after. > > kinda neat. > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > > https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=05%7C01%7Ctoddz%40pgrahamdunn.com%7C0fa3074c034248ba60d508dad1ad2e3a%7C5758544c573f47cebee96c3e0806fb43%7C0%7C0%7C638052838992711450%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=aaOUNvxcdaW9Kw%2F%2FZtos6aGo98LDtAr4jRK7pO22NDs%3D&reserved=0 > > > _______________________________________________ > 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
