16 Jun
2015
16 Jun
'15
10:31 a.m.
On 2015-06-16 18:21, Paul Koning wrote:
And yet another (possibly the most common one on computers) is to have a
small drive wheel that pulls the tape at constant speed across the
heads, and then have some other construction that drives the tape reels
depending on tape tension or length. Think vacuum columns or spring
loaded arms.
And then we have drives like the TU80/TU81 which do not seem to fit into
any of the mentioned categories. I'm not entirely sure how they work,
but I think they are similar to the DECtape in this sense.
Johnny
On Jun 16, 2015, at 12:10 PM, tony duell <ard
at p850ug1.demon.co.uk> wrote:
Another solution is to avoid the problem entirely by not requiring constant linear speed.
That?s what DECtape (the real one) does.
As long as we're talking philosophy, what do y'all think about emulating the TU58
drive, vs. emulating the TU58 > *tape*?
I cannot properly express my opinion of that tape cartridge design even if I violate list
rules about use of
profanity. But the drive itself isn't all that bad, aside from not having enough
motors to manipulate a
well-designed tape cartridge mechanism.
The tape cartridge (along with QIC cartridges, etc) is an interesting design. Of course
the general problem is
to run the tape at constant linear speed past the head while winding it off one reel onto
the other. In general
there have been 3 solutions to this.