I've been working on an IBM Selectric typewriter which I bought earlier
in the year. It is the I/O Selectric type 735 which differs from a
normal Selectric in having the solenoids and switches on it to allow it
to be used as a printer and keyboard.
When I got it the motor wouldn't run, and the mechanism was jammed. The
motor problem was its thermal trip, which is meant to be the resettable
type, so I replaced that. I gave the whole thing a clean with
degreaser, which freed up the mechanicals, then oiled and greased it.
It then worked happily as a typewriter.
I have made a small interface, based on an Arduino Mega 2560, which
provides a serial port. Currently this only supports printing, but will
be extended to include the keyboard. It uses almost all the digital I/O
on the Mega (15 solenoids, 27 contacts.)
There are still some adjustments to be done, and I am awaiting a set of
Bristol Wrenches (Keys) so I can safely do these. I have tried using
Torx and Allen keys, and while they can be made to 'fit', it doesn't
seem like a good idea.
There are some pictures and videos of the typewriter here:
You can get the Arduino interface code here:
I haven't yet documented the hardware I used for the solenoid drivers,
but if anyone is interested I can put some notes together (basically:
Arduino output to 2N7000 FET buffer to ITS4140N +48V high-side driver on
the output side, and a simple 250R pullup to +5V on the input side.)
(or other Bitsavers mirrors)
Info on the Mega2560 here: http://arduino.cc/en/Main/arduinoBoardMega2560
Lawrence Wilkinsonlawrence at ljw.me.uk
The IBM 360/30 pagehttp://www.ljw.me.uk/ibm360