On 10/15/2015 02:19 PM, Jay Jaeger 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.
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".
If this was my circus, I'd machine a fixture consisting of a plate with the 33 sector/index holes precision-drilled and a top plate with the same holes and a hub for the floppy to fit over. Use the index hole to align the thing and then, using a sharpened punch, go around the entire 32-hole circuit. Presto--a pefectly-punched disk.
The more elite may want to punch the holes with a laser. In either case, the cookie has to come out of the envelope, but that's usually not much of a problem.
Or go over to vintage-computer.com. There's a fella there who's using an MCU to generate the sector pulses for 5.25" floppies.
--Chuck
