1 Dec
2017
1 Dec
'17
4:03 p.m.
(posted this just as the list went down earlier, apologies if it appears twice)
If you have a paper tape reader and no punch, you can now make real working paper tapes
using a normal home stencil-cutting machine.
I've written a small command line utility that can take a .PTAP (or any other binary
or textfile) and generate output that these
machines will cut. that your reader will read.
It can easily make repair pieces for existing old broken tapes from any byte offset. In
addition it can make banner tapes, 5-level
Baudot RTTY tape, your own custom n-level paper tape or cut tapes from other materials
such as plastic.
Even if you don't need it to make or repair tapes, it can be used to visualise a paper
tape through the console output it produces.
I'd never claim it's any sort of replacement for a real punch, and it's a
whole lot slower. But, it does work :)
A simple example to make a tape of the characters ABCDEF with 1/2 inch of sprocket leader
and 1/2 inch of trailer:
C:\> ptap2dxf --text="ABCDEF" --leader=5 --trailer=5 --output=ABCDEF.dxf
+---------+
| . |
| . |
| . |
| . |
| . |
| O . O|
| O . O |
| O . OO|
| O .O |
| O .O O|
| O .OO |
| . |
| . |
| . |
| . |
| . |
+---------+
Joiner 0000: data byte 00000000 absolute position 00000011
The resulting ABCDEF.dxf file can be viewed in a DXF viewer such as Inkscape and directly
loaded into the paper/vinyl cutter for producing
the actual working tape.
Another example: say you need a repair piece for an absolute loader, starting at byte 57
for 12 bytes. (A repair piece has removeable side
tabs for handling as a self-adhesive vinyl joiner):
C:\> ptap2dxf DEC-11-L2PC-PO.ptap --range=57,12 --joiner --ascii --control
+---------+
| O .O O| JOINER %
| . O | JOINER <STX>
| . | JOINER <NUL>
| O . O| JOINER !
| . OO| JOINER <ETX>
|OOOO .OOO| JOINER
| O. O| JOINER <HT>
| O O.O | JOINER ,
| . | JOINER <NUL>
|O .O | JOINER
| OO . OO| JOINER c
| . O| JOINER <SOH>
+---------+
The output for machine cutting will be in DEC-11-L2PC-PO.dxf
For larger tapes, the output can be chunked into sections which can be cut individually.
There are other options to invert, mirror, reposition
the sprocket feed and so on.
If you think you may find it useful, it's fully open source and available at
https://github.com/1944GPW/ptap2dxf
It will run on Windows (pre-built exe provided) and Linux and Mac (follow building
instructions).
The 26-page illustrated User Manual PDF is at
https://github.com/1944GPW/ptap2dxf/blob/master/Documentation/PTAP2DXF_User…
Steve.