Hi Roy.

12-Feb-04 04:06:32, Roy J. Tellason wrote to Greg Mayman



 RJT> No,  the data sheet specifically mentioned vcr and audio cassette
 RJT> applications. I can see reversibility being a good thing if
 RJT> you're running a tape cassette and have a bidirectional
 RJT> capability in the deck -- you'd have the mechanism switch
 RJT> capstans, but the motor would also need to spin in the other
 RJT> direction.  VCRs? Hm,  that's a little more difficult, I'm not
 RJT> that up on the mechanicals of those

I think the intention is to drive the servo that loads tape round the head
and switches the tranmission (FF/REW/PLAY need different mechanical
configurations
etc.

I think newer VCRs may be using the same motor that drives the captans etc
to switch the transmission (takes a whole mess of annoying little plastic
gears)  I seem to recall my answering machine uses a similar setup.
reversing the motor changes gears, loads and unloads the heads and pinch
roller, running it forwards drives the tape.


 -=> Bye <=-

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