On 05/12/2020 10:36 PM, Bill Degnan via cctech wrote:
  Following up on the results of my searching around.
The FANUC A860 reader
 with A20B controller (the normal set up) has a 50 pin output port.  There
 is a device one can buy that receives the signal from the FANUC's 50-pin
 port and converts to into 25-pin RS232.  The device is called a behind the
 tape reader or BTR.  There are models of BTR made for FANUC.  I found the
 Memex MX1000 and MX1100, Sanyo RLC174 and DOSTEK 440A.  I am sure there are
 more.
 
20+ years ago, I resurrected an Allen-Bradley 7320 CNC
controller. I didn't want to deal with paper tapes, and had
to modify the program a bit, anyway, and had no punch.  So,
I built my own BTR. The interface on this one was a 12 V
logic standard, but quite simple.  8 data bits and a strobe
came out, and there was an input to advance to the next
character.  (These old CNC controls had bi-directional
readers, and the control could move forward and backwards on
the tape.  But, I didn't need the reverse feature.)
It was a pretty simple thing to set up and connect through
the computer's parallel port.
Jon