Hi Sam, So how exactly are you going to count it? Time between the top trace edge and the bottom trace edge? As you cross the threshold into the next 0.1" and it mechanically jitters at that point what will you do to not have counts go wild? John
> -----Original Message----- > From: Sam Sokolik [mailto:samco...@gmail.com] > Sent: January-25-22 6:19 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] 60's vintage position feedback.. (GE Accupins) > > https://youtu.be/7HtqwcKDlCk > > On Sun, Jan 23, 2022, 6:47 PM Chris Albertson <albertson.ch...@gmail.com> > wrote: > > > This > > > > On Sun, Jan 23, 2022 at 4:30 PM andy pugh <bodge...@gmail.com> wrote: > > > > > On Sat, 22 Jan 2022 at 04:49, Chris Albertson <albertson.ch...@gmail.com > > > > > > wrote: > > > > > > > > Arduino? Too slow to coune pulses if they happen every 0.0001 inch > > > unless > > > > the table moves slow. > > > > > > As long as it gets a couple of samples every 0.1" it should be fine. > > > Between the pins it's an absolute encoder, like a multi-turn resolver. > > > > > > Though I would still suggest using one of the M4 or M0 boards from > > > Adafruit, as the clock rate and floating point performance are just > > > orders of magnitude higher, for about twice the cost. > > > > > > > That is about what I suggested. "Pico" is a dual core M0. Adafruit has them > > for $4 each. > > https://www.adafruit.com/product/4864 > > So yes, orders of magnitude better but half, not twice the cost. > > > > The price is so low that it is little different from free. That for two > > M0 cores at 125 MHz and 8 of those programmable state machine, also at > > 125MHz. and 2 MB of flash. Very good documentation. > > > > Works with Arduino IDE and runs most Arduio code but you can program it > > with Python too. > > > > > > > > > > > -- > > > atp > > > "A motorcycle is a bicycle with a pandemonium attachment and is > > > designed for the especial use of mechanical geniuses, daredevils and > > > lunatics." > > > � George Fitch, Atlanta Constitution Newspaper, 1912 > > > > > > > > > _______________________________________________ > > > Emc-users mailing list > > > Emc-users@lists.sourceforge.net > > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > > > > > -- > > > > Chris Albertson > > Redondo Beach, California > > > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
