"Jay West" <jlwest_at_tseinc.com> wrote:
> When I remove the baseplate, the first board visible does have some stuff on
> it, but certainly not a uart. This first board is almost (within 1/2 inch)
> as long as the board underneath it. This first board is virtually empty,
> except there was one row of 13 small transistors top to bottom, then a row
> of approximately 3 resistors and 1 diode for each transistor. Then there's a
> fair amount of traces taking the signals to the edge connector. It would
> appear that the sole purpose of the back half of this board is to bring two
> test points to the rear of the unit (6v and gnd).
First I want to say that Western Numerical Control sells copies of the
technical
manual for the Facit 4070. The cost is $25 and if you order, ask for
the free
mylar sample and they will send you about 50 feet of 1" mylar tape. The
Facit
4070 punches mylar just fine.
OK now, the manual calls the first or bottom board the "matching
board". And
says "This board can be supplied without components, to be used by the
customer
for his own interface electronics".
This board in my 4070 was originally blank but was then hand wired
with one
74LS04 and one 74LS00 to invert the 8 data bits, and one 74LS123 to
provide
the right length pulse for the punch start signal. I also have a HP
9884A
(which is the same thing) that has a HP PCB with transistors in this
first
slot.
> The board underneath this appears to be the main logic board you referred
> to, as there are a number of power transistors on the board. As a point of
> reference, there are also a set of hardwired jumpers, labeled 1 through 8 on
> the board too. Next to this is a set of small transistors marked off as 1
> through 9.
>
> Then there is a metal plate (3 screws remove the top half of it) revealing a
> final small PCA, obviously power related (theres a few 7 watt resistors, and
> what appears to be some yellow coils).
These punches come standard with a parallel interface, but they make
RS-232
interface and a "Multi Interface" board which is a parallel,RS-232,and
current
loop interface. This multi interface has a toggle switch to select the
interface
and a DB-25S on the board for RS-232 and current loop operation. (For
parallel
operation the DB-25 on the rear of the punch is used). This multi
interface
also has two 8 switch, one 5 switch, and one 4 switch dip-switches on
the board.
So without seeing your board I would bet that it is a parallel board.
Here is the information that Tony sent me before I ordered my manual
(hopefully
it will save him from typing it all in again :)
> Here's the jumper board info - it's very simple.
> First find pin A1 on the option card connector. This is linked to pin 1
> on the DB25, so an ohmeter will find it.
> The pins on that side of the connector are A1-A22, those on the other
> side are B1-B22
>
> The jumper board links :
> A1-B1
> A2-B2
> A3-B3
> A4-B4
> A5-B5
> A6-B6
> A7-B7
> A8-B8
> A9-B9
> A10-B10
> A11-B11
> A12-B12
> A13-B13 (maybe, the manual is unclear here, but unless you need the
> timing pulse output it doesn't matter)
>
> That's it. 12 or 13 through-board links.
>
> ---------------------------
>
> Cable Wirelist : IBM Printer Port -> Facit 4070 Punch
> PC Punch
> Strobe (1) o----------------o PI (11) [Punch Instruction]
> D0 (2) o----------------o Ch1 (1) [Channel 1]
> D1 (3) o----------------o Ch2 (2) [Channel 2]
> D2 (4) o----------------o Ch3 (3) [Channel 3]
> D3 (5) o----------------o Ch4 (4) [Channel 4]
> D4 (6) o----------------o Ch5 (5) [Channel 5]
> D5 (7) o----------------o Ch6 (6) [Channel 6]
> D6 (8) o----------------o Ch7 (7) [Channel 7]
> D7 (9) o----------------o Ch8 (8) [Channel 8]
> Busy (11) o----------------o PR (12) [Punch Ready]
> Gnd (25) o----------------o Gnd(25) [Ground]
> +---o Ch9 (9) [Channel 9 - Sprocket]
> +---o +6V(24) [+6V output]
>
> -----------------------
>
> [This bit applies to a special application that I used it for - hence the
> reference to punching card. Some of the rest of it might be useful, though]
>
> Facit 4070 Notes
> ----------------
> [Circuit references apply to TTL logic board version 1]
> Increase the 1K pull-down (R54) on the PI line to about 10K since the pull-up
> on the IBM printer port is otherwise too high to turn on VT11.
>
> Increase the monotime of IC23 to give a bit more punch-pin drive for reliable
> punching on card. Set R97 to 27K and remove R129
>
> Make sure the punch solenoids are correctly set up as per the Service Manual.
> (Procedure 5.1E)
> ------------------------
> Here's the Pascal program fragments to talk to the punch. Call init_punch
> at the start of the program (before turning on the 4070!) and then
> punch_byte for each character to be punched
>
> const port_base=$278; {port were 4070 is connected}
>
> procedure init_punch;
> begin;
> port[port_base+2]:=1; {Set PI low}
> end;
>
> procedure punch_byte(ch:byte);
> begin;
> repeat; until (port[port_base+1] and 128) = 0;
> port[port_base]:=ch;
> port[port_base+2]:=0;
> repeat until(port[port_base+1] and 128) > 0;
> port[port_base+2]:=1;
> end;
> ---------------------------------
I started building a PC to 4070 interface cable, with a 'C' version
of Tony's program, but I got to the point of senting a punch signal
to the 4070 and the punch's power supply would shut down. I stepped
away for a few days and I have not gotten back to it to determine
what I was doing wrong.
I hope that helps,
--Doug
P.S. WNC also sells a RS-232 interface for the Facit 4070. Price new
$695.00,
used $495.00 :)
====================================================
Doug Coward dcoward_at_pressstart.com (work)
Sr. Software Eng. mranalog_at_home.com (home)
Press Start Inc.
http://www.pressstart.com
Sunnyvale,CA
Curator
Analog Computer Museum and History Center
http://www.best.com/~dcoward/analog
====================================================
Received on Mon Jul 26 1999 - 04:37:53 BST