On Sunday 04 April 2021 15:28:50 Leonardo Marsaglia wrote: > I jump in into this to say I'm using something similar on the lathe. > > I have servo motors and I'm using them in open loop mode (like > steppers). Nevertheless I could use their index pulses to home > accurately enough (slowing the speed down to gain accuracy) with the > normal homing sequence. > > Basically I made a component that senses in what stage of the homing > sequence the machine is and then it bypasses the home switch or the > index pulse as needed. Both are used as home switch input but the > index is the one used in the final stage of the homing process. > > So to sume up, the machine moves until it finds the real limit switch, > once it's triggered the machine backs up until the switch is open > again. Then it approaches to the home switch again but this time it's > bypassed and the index pulse is the one that's affecting the homing > sequence. > > It's working flawlessly from what I could test with a dial indicator. > > Leonardo Marsaglia
I assume that motions mode signal is doing the switching? Thats a great idea Leonardo. Any body with encoders on all axises should be doing it. > El dom., 4 abr. 2021 15:36, Jon Elson <[email protected]> escribió: > > On 04/03/2021 11:39 PM, Sam Sokolik wrote: > > > Initially I would just try 'and-ing' the 2 in hal or classic > > > ladder and > > > > run > > > > > strait to the home input. (Not using the home to index) > > > > If the prox sensor is of very short duration in linear > > motion, then the AND will just pop on for a moment, and > > likely go past it on the initial home search. That will > > likely confuse the homing sequence. But, you can try it. > > > > Jon > > > > > > _______________________________________________ > > Emc-developers mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-developers > > _______________________________________________ > Emc-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers 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) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
