9-Track 1/2" Tape Drive Recommendations?

Jay Jaeger cube1 at charter.net
Sat Aug 22 12:07:25 CDT 2015

On 8/22/2015 5:32 AM, Brent Hilpert wrote:
> On 2015-Aug-21, at 10:20 PM, Ali wrote:
> A brief conceptual overview:
> Vacuum-column and spring-arm drives comprise 3 servo systems:
> 	- each reel motor is in a closed servo loop with position sensors in its associated vacuum column or spring arm.
> 	- the capstan motor, driving the exposed tape between the reels, is in a servo loop with a tape-speed sensor,
> 	  and externally controlled by commands for forward/reverse and speed selection.
> The 3 servo systems are electrically independent (in control terms and leaving aside power supplies).
> The connection between them is the tape.

One other type:  spring arm, where the tape reels do all the tape
moving, and a speed sensor, rather than a traditional capstan.  The
tension arm is part of the servo system to which the reel motors
respond.  In this case the reel motors and tension arm are anything but

Example:  HP 88780


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