yes sorry gene in my haste yes it has full quad a b z
On 28 August 2014 15:24, Gene Heskett <ghesk...@wdtv.com> wrote: > On Thursday 28 August 2014 09:41:15 David Armstrong did opine > And Gene did reply: > > Guy's > > i'm having a problem trying to get a analog 10v spinde to scale > > correctly > > > > the spindle has a 1000 count encoder > > and gives a speed of 6200 rpm > > Thats good info but does go far enough. Does it do A/B/Z outputs in > quadrature format? > > At 1000ppr, thats an edge rate into the encoder module of a bit north of > 100 kilohertz at 6200 rpms. If its quadrature A/B/Z output then that the > equ of slight more than 410 kilohertz rate for determining the encoders > position. > > This will absolutely preclude the use of a pure software approach thru the > parport. > > > now either i set the scale at 62 > > and i get movement or what i thought was correct and get full speed and > > no change > > > > as i calculate if i am correct top speed 6200 so 10/6200 = 0.00161 > > in my ini i have > > > > OUTPUT_SCALE = 0.00161 > > > > i have not touched the scale setting in the hal file > > setp scale.spindle.gain 60 > > In most hal files this would be used to drive the tachometer graphic by > multiplying the encoders velocity output, usually in RPS, so it displays > RPM. > > > setp lowpass.spindle.gain 1.000000 > > And this would be set at a much smaller value to steady the graphic > tachometer. Otherwise the needle is so bouncy its hard to follow, or if > using the bar graph version, the last 2 digits of the rpm displayed are so > random as to be a bit un-nerving because you just know, with the mass of > the chuck and all, it can't possibly be changing its speed by a hundred or > more rpms 10x a second which is the usual display update rate. So we need > more info before we can do much more than make SWAG's about what you'll > need to do. > > > which i dont think i need so , > > so just becoming confused > > > > any guidance please > > I will, in the next day or 4, be getting all this built and sorted, using > one of the Pico Systems PWM driven servo amplifiers to run the spindle on > my 7x12, using a Mesa 5i25 card without any accessory cards attached. So > that obviously will color what I have to say. Someone else, using > different hardware from mine will probably have totally different ideas > about how to go about calibrating this. > > > Dave > > ----------------------------------------------------------------------- > > ------- Slashdot TV. > > Video for Nerds. Stuff that matters. > > http://tv.slashdot.org/ > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > 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) > Genes Web page <http://geneslinuxbox.net:6309/gene> > US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS > > > ------------------------------------------------------------------------------ > Slashdot TV. > Video for Nerds. Stuff that matters. > http://tv.slashdot.org/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
