On Thursday 19 March 2020 19:12:37 Jon Elson wrote: > On 03/19/2020 04:02 PM, Gene Heskett wrote: > > Greetings; I am trying to reduce the f/r error in an ATS667 based > > encoder. > > > > The index pulse is turned upside down by a reversal of spindel > > direction. Tts the nature of the beast to remain in this stable > > state until the approach of the triggering ferrous metal causes the > > first reversal which the edge ignores, and then goes back true or > > false as the ferrous piece crosses the center. > > > > > > > > Does anyone see any problems with that? > > The index pulse is only used during the initial synch to the > spindle, then the encoder is counted > up and down during reversals, without looking at the index > again. So, rigid tapping doesn't care > that the index signal from the encoder does something > different when the spindle is running in > reverse. It has been this way since I did the first ATS667 > encoder hack some years ago. > > Jon > Thats good news, but it looks as If I'll have to burn a new card to get the pin Peter just told me about, unless mesaflash has grown the ability to work thru an rpspi interface. I did have a machine with all the card firmware on it but had to put it on the G0704 with a new SSD drive after I apparently blew a pci bus driver during a local t-storm. The parport on that box isn't currently in use so I'll have to see if that machine can program a new 7i90HD since I don't believe the pi4 can w/o building a hardware parport for it.
Thanks Jon, and stay safe. 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
