> On Jun 16, 2015, at 12:31 , Paul Koning <[email protected]> wrote: > Part 1: two capstans spinning all the time, in opposite directions. > Solenoid-activated pinch rollers would press the tape against the capstan to > set it moving.
That's also how the magnetic card is moved in and out in the Mag Card II typewriter. There's a pair of counter-rotating capstan wheels below the card, and a pair of solenoid-actuated pinch rollers opposite them, above the card. The head is moved from track to track with a solenoid-actuated escapement that lets the head move one track at a time under spring pressure, and then yet another clutch lets a free-running roller grab a cable to pull the head back to the first track. I have one waiting for my attention. I think the job will be much more mechanical than electronic! -- Mark J. Blair, NF6X <[email protected]> http://www.nf6x.net/
