The CL program I have running on our machine has at least 20 different variable comparisons. There are even 6 in a single rung with 4 or branches and 2 pairs anded together. So yes you can use more than two, and as far as I know there is no practical limit.
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
