DIY Paper Tape Punch - Mechanism diagram?

[Tony Duell]

On Fri, May 1, 2020 at 4:32 PM John Foust via cctalk
<cctalk at classiccmp.org> wrote:

> Were there any paper tape devices that did not use the sprocket holes
> to move the tape?

Yes, both punches and readers.

The Facit 4070 (and the N4000) punch uses a capstan and pinch roller
to move the tape. It's driven by a stepper motor. Of course it punches
the sprocket holes.

As I said the other day several high-quality optical tape readers
(Trend, HP2748) feed the tape with a capstan and pinch roller. They do
take a timing signal from the sprocket holes of course.

-tony


>
> - John
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