> > Humm, seems to me that pin should be available full time if its that > usefull. Or it could or ought to be a new output code for the mode pin? > Something we could decode with bitslice?
Well, I hope that pin stays forever on LCNC at least as a debugging tool. I've been reading the 2.9 homing section and as Phil says if I understand correctly, the new parameter HOME_INDEX_NO_ENCODER_RESET should do what I did on 2.8 pre. Is that right? El lun, 5 abr 2021 a las 15:52, Gene Heskett (<[email protected]>) escribió: > On Monday 05 April 2021 13:46:01 Leonardo Marsaglia wrote: > > > > 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. > > > > Hello Gene. I hope you're doing great! > > > You too Leonardo. > > > I'm using the joint.*N*.home-state pin intended for debugging. Turns > > out, it's a pretty useful pin for this purpose. Otherwise It would > > have been trickier to fool the homing sequence to do this. > > Humm, seems to me that pin should be available full time if its that > usefull. Or it could or ought to be a new output code for the mode pin? > Something we could decode with bitslice? > > > I really need to close the loop and use the servos in analog mode > > someday, but since this retrofitting was intended to be done at > > lightning speed on quarantine I didn't want to mount the encoders and > > do all the extra job. The machine works excellent like this, and my > > only concern was the homing sequence which turned out really well. > > > > Here is a little video of the test I did with the motor on the "bench" > > before the conversion https://youtu.be/9s-UC-5ZIrU > > <https://youtu.be/9s-UC-5ZIrU> > > Interesting. :) > > And I won't snip as the whole story is here. > > > Notice that the absolute value of the encoder at the final zero > > position is always the same after three attempts (this was always the > > case in any attempt). I was simulating the home switch triggering by > > hand. Off course this is without load, so I reduced homing speed at > > the machine just in case to improve the repeatability. > > > > > > > > El dom, 4 abr 2021 a las 19:08, Gene Heskett (<[email protected]>) > > > > escribió: > > > 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 > > > > _______________________________________________ > > 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 > _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
