Another Orac retrofit, re-using spindle encoder?
Posted: Tue 19 Apr , 2022 11:27 am
Hi Folks,
Picked up a ORAC of 1985 vintage. appears to be original and unmolested although the monitor did not function so so idea if the computer side works.
I have managed to get the lathe running with the existing PSU, steppers, drives and Jaguar VC150 VFD.
Spindle and axis are running via a cheap breakout board and LinuxCNC and switching the steppers drives using transistor circuit i found here.
I can see the encoder generating the index and reference pulses on the original control board (LEDs on off corresponding with encoder disc).
IS there a way i use this is encoder along with my BOB and LinuxCNC?
Looking through the diagrams for the control board and encoder i have Red as 5v+ and green as 0v. That leaves Blue as speed and Yellow as Sync?
I have wired it like this, taking 5v off my BOB and wiring the signals into the pin 10 & 11 of the BOB.
Setting these pins as spindle signals in linux, does not produce a reading any ideas? Which is index Spd or Sync?
I have included a diagram of the basic setup i have so far. Thanks for any help
Picked up a ORAC of 1985 vintage. appears to be original and unmolested although the monitor did not function so so idea if the computer side works.
I have managed to get the lathe running with the existing PSU, steppers, drives and Jaguar VC150 VFD.
Spindle and axis are running via a cheap breakout board and LinuxCNC and switching the steppers drives using transistor circuit i found here.
I can see the encoder generating the index and reference pulses on the original control board (LEDs on off corresponding with encoder disc).
IS there a way i use this is encoder along with my BOB and LinuxCNC?
Looking through the diagrams for the control board and encoder i have Red as 5v+ and green as 0v. That leaves Blue as speed and Yellow as Sync?
I have wired it like this, taking 5v off my BOB and wiring the signals into the pin 10 & 11 of the BOB.
Setting these pins as spindle signals in linux, does not produce a reading any ideas? Which is index Spd or Sync?
I have included a diagram of the basic setup i have so far. Thanks for any help