8" hard sector (Was DG S/130 status)

Chris Elmquist chrise at pobox.com
Thu Oct 15 21:54:37 CDT 2015

The punch aligns with the index hole since we are starting with soft-sector media and that's the only hole we have.  Then it "clamps" the media and you rotate the punch and the media together to align each sector hole with a hole in the template part of the punch and slam the punch pin through.  It's harder to put in words than it is to do.

Generally, they worked pretty well.  The original idea was Dwight's and I had a friend with precision machine shop build them from aluminum and delrin.

Some users complained about "hanging chads" as the punch pin sometimes didn't cut the media cleanly but this was fairly rare.


On October 15, 2015 4:19:24 PM CDT, Jay Jaeger <cube1 at charter.net> wrote:
>So, hole by hole - what about the extra hole for the index - one would
>need the jig to have an extra hole for the punch for that at 1/2
>Sent from my iPad
>On Oct 15, 2015, at 13:36, Dennis Boone <drb at msu.edu> wrote:
>>> I doubt it.  They need to be very accurate, and one would not want
>>> open the sleeve to punch one.
>> A set of 10- and 16-hole punching jigs were done by a list member
>> years ago.  They work through the window in the sleeve, so don't
>> opening the sleeve.  But they're for 5.25".
>> De

Chris Elmquist

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