After some testing this is what happens: G96 is reading the speed well because the feed appears noisy on screen. And also If I set different max RPMs I get different feeds. The problem here is that, whatever I do, I'm always clipping to max rpm. I tried to set the S value really low like 0.5 and I get max rpm too.
Could this be a bug? Remember that the spindle works great at RPM mode. El jue., 30 abr. 2020 a las 10:08, Leonardo Marsaglia (< [email protected]>) escribió: > I forgot to tell you that I'm driving the spindle open loop yet. But again > I don't think that could be the problem. > > El jue., 30 abr. 2020 10:03, Leonardo Marsaglia <[email protected]> > escribió: > >> Well I just corrected my scale and activate the encoder filter and now >> I'm pretty much spinning the spindle at the rpms it's asked to. >> >> The problem is still my g96 code. When the program tries that command >> with a 700 rpm limit, the lathe starts to spin to that maximum speed no >> matter the position of the x axis. >> >> I don't have spindle at speed connected but I don't know if that can be >> the problem. >> >> I really don't know what's going on. Please let me know of I'm missing >> something. >> >> Thank you! >> >> Leonardo Marsaglia >> >> El mié., 29 abr. 2020 22:31, Leonardo Marsaglia <[email protected]> >> escribió: >> >>> Hello Gene, >>> >>> I'm using a step generator from the 7i52 to feed the pulse command input >>> on the Yaskawa v1000. So I have to play with the scale factor to modify the >>> frequency. The driver accepts a maximum frequency of 32 khz and it has a >>> max freq setting inside that range to set up the maximum velocity. I'll try >>> to play with that tomorrow. >>> >>> What I don't understand is why I don't have a ramping velocity when >>> using G96 for grooving for example. May be I'm clipping onto max rpm when I >>> set up the cam software? Because I'm limiting the RPMs for the grooves to >>> 700 RPM max no matter the surface speed. Needless to say, I'm still getting >>> myself used to make my programs with CAM software. >>> >>> But there's still the feed override problem on axis, wich is not a big >>> concern because I'm not planning to override the spindle from that slider, >>> but It worries me that it's not working like it should be. >>> >>> Thanks! >>> >>> >>> >>> El mié., 29 abr. 2020 a las 21:10, Gene Heskett (<[email protected]>) >>> escribió: >>> >>>> On Wednesday 29 April 2020 19:02:17 Leonardo Marsaglia wrote: >>>> >>>> > It's me again, >>>> > >>>> > We managed to get the spindle VFD working with pulse input command. >>>> > The problem is, I can't get to work the G96 code or the feed override >>>> > on axis. I'm able to set different speeds via MDI and it responds well >>>> > but that's all. The feed override slider is behaving like a on/off >>>> > switch turning off the spindle when it reaches to zero. Also, If I >>>> > increase the speed using the buttons on manual mode on axis the RPMs >>>> > jump in a very staggered way. In MDI this doesn't happen. >>>> > >>>> > Checking the *spindle.M.speed−in* it seems to receive the RPS from the >>>> > encoder module. The only thing that's not looking good is how noisy >>>> > the signal is. I didn't activate the encoder filter but I can try that >>>> > tomorrow, although I don't think that's what's avoiding G96 to work. >>>> > >>>> > I tried the same g-code on axis sim lathe and it works ok. Any ideas? >>>> > I suspect it's the same thing that's causing both problems but I don't >>>> > know where to look. Please let me know what you think. >>>> > >>>> > Thank you as always! >>>> >>>> If the pwmgen you are using has a "PDM" mode, try that along with >>>> reducing the frequency. A kilohertz s/b plenty. The vfd will average >>>> it >>>> nicely, and the lower frequency will give more, different speeds. In >>>> PDM mode and low speeds it will skip pulses, or should. >>>> > >>>> > _______________________________________________ >>>> > Emc-users mailing list >>>> > [email protected] >>>> > 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) >>>> 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-users mailing list >>>> [email protected] >>>> https://lists.sourceforge.net/lists/listinfo/emc-users >>>> >>> _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
