Actually 127 Pulse/rev works ok. If you have 5 TPI screws it works out to: 0.2 / 127 = 0.00157" per pulse. If you count all of the edges of the full quad signal (which is normal) you can divide that by 4 which is approximately .00157/4 = .000393 in/count.
That seems adequate to me. Dave On 4/1/2014 1:59 AM, Gregg Eshelman wrote: > Specs on the rotary encoder. > 3=Quadrature with index > 25=0.25" bore > 127=127 pulse/rev Probably wayyyyy too coarse. Apparently super Z axis > accuracy wasn't real important on this mill back in 1990. > > All three ball screws are 5 TPI. > > On 3/31/2014 7:22 AM, Dave Cole wrote: >> The scales should not be a problem. TTL encoder inputs are common on the >> Mesa boards. >> You will need to look up that BEI encoder to find the specs. >> TTL or differential line driver are common. >> >> I've been using the Mesa 7i43 with a 16 in 8 out I/O board ( 7i37TA) and >> either the servo (7i33TA) or the stepper interface board, but the 5i25 >> gives more bang for the $ if you have a PCI slot available. The 7i37 >> is very flexible regarding sourcing or sinking inputs and outputs which >> is really nice for retrofits. >> >> Dave >> >> On 3/31/2014 1:02 AM, Gregg Eshelman wrote: >>> Anilam System A-10 pinout >>> >>> pin 1: A chan (white) >>> pin 2: NC >>> pin3: COM (black) >>> pin4: B chan (green) >>> pin5: NC >>> pin6: +5V (red) >>> pin7: marker pulse (brown) >>> pin8: NC >>> >>> Specs I've found is they're 10 micron, 0.0004" resolution, square wave >>> TTL output. >>> >>> I have 1600 oz/in stepper motors on the mill. The Z axis has a rotary >>> encoder on its ballscrew. >>> >>> BEI MODEL >>> M153-25-127 >>> DATE CODE 9021 > ------------------------------------------------------------------------------ > _______________________________________________ > 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
