Tape Drive Capstans

Al Kossow aek at bitsavers.org
Fri Jan 30 12:44:41 CST 2015


On 1/30/15 10:29 AM, Ali wrote:

> How are you using these? Do you have the original OD and ID measurements of
> the roller and slip the tube with the right OD over it?
>

Correct. You obviously have to have one surviving roller to be able to do this.

Brad Parker fixed some TU58's a while ago and sent me a 1' piece of Norprene that
a friend of mine cut for me. You end up with a lot extra because you have to buy
10' minimum. He also just did a few for the 9145s we have. You put
a dowel inside the tube and cut using dish soap as a lubricant. He used an Xacto
Saw blade.

I guess creating a table for tubing diamaters that work with common pinch roller
types would be a good thing. There are some rollers that may be difficult to do.
The early DEI 1/4" cartridge drives have very small rollers. There hasn't been
much experimentation yet as far as how much the outer diameter can vary. Most of
the cartridge tapes I know of use self-clocking encoding formats, so it might
actually be quite a bit.






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