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

dwight dkelvey at hotmail.com
Fri Oct 16 10:18:23 CDT 2015

I do still have some 16 hole 5-1/4 punches left. ( anyone want one? )
Actually it was stainless and Delrin.
I'd makes some slight changes if I did it again.
It really needed two alignment pins.
It didn't need to have the envelope removed. One rotated the envelope to
expose the next hole location.
> From: chrise at pobox.com
> 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.
> Chris
> 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
> >spacing.
> >
> >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
> >to
> >>> open the sleeve to punch one.
> >> 
> >> A set of 10- and 16-hole punching jigs were done by a list member
> >some
> >> years ago.  They work through the window in the sleeve, so don't
> >require
> >> opening the sleeve.  But they're for 5.25".
> >> 
> >> De
> -- 
> Chris Elmquist


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