Arfa Daily wrote:
"William Sommerwerck" wrote in message
...
I get everything back in place and work the mech by hand, and all
ok, so I put it all back together again, and now it plays in forward,
plays in
reverse, but when you stop and try to play forwards again, it cuts
out because the trailing spool isn't going round. Why? because
there is now a small loop of tape in the cassette that's just long
enough to not be taken
up before the autostop cuts in. And why is there a loop ? Because
as the mech comes to a stop, it just for the tiniest moment
'flicks' the take up spool in the 'wrong' direction. And why does
it do that ? **** knows is the
simple answer ...

If I understand your description correctly... it shouldn't matter
whether it flicks the take-up spool, because the "correct" way to
design an autostop system is to wait until the takeup hub stops
turning. This is the way Sony's WM-D6C -- and doubtless hundreds of
other cassette decks -- work.


Yes sorry. Senior moment. It's the *supply* spool that it momentarily
flicks, and the tape counter - and hence the autostop - pulses are
derived from that spool rather than the take up spool (in "forward"
that is, because in reverse play, the supply spool of course becomes
the take up spool ...). So it's fine in reverse play, rewind, and
wind - because it's quick enough to take up the slack and get the
supply spool turning - but not in forward play, because the capstan /
pinch roller is pulling the tape slowly enough that it takes probably
2 seconds to clear the loop, and the autostop trips in probably 1.5
seconds. And of course, what does the autostop do ? Why, it stops the
deck, of course, and what does that do ? Right. It flicks the supply
spool and throws out another 2 seconds' worth of tape ... VERY
frustrating. You can make it play by hitting FF and then immediately
hitting play. No loop then and the supply spool is providing tape
counter / autostop pulses right from the off.
Arfa

Is there any type of braking mechanism and if so, is it functioning
properly? Could the brake pads be worn out?

--
David Farber
Los Osos, CA