So, getting back into my Apple //e recently and after getting ADTPro working (and the Online Disk Server), I decided to notch some of my floppies to use side 2.
So, I grabbed my trusty hole punch, just like in ye olde days.
Then I remembered those neato disk notchers, and checked ebay. Seeing only one at or over $100 or so, decided that wasn't the route.. ;-)
Then I decided to check Thingiverse to see what 3D printer options might be available to help.
Actually did find a "floppy notch guide" to help line up your hole punch better!
So got that, but it wouldn't fit on my 3D Printer (Monoprice Mini).
Took it into Tinkercad (Not a pro designer) to cut it down to fit, and started to do that... But then I changed my mind and decided to make a more basic one from scratch.
Just basically took a rectangle, cut a floppy width section out of it. Added a spot for the hole punch and for my thumb to hold the disk in place while punching. And after about 4 prototypes (I am not great with measurements), I have been able to make some much more stable notches than what I normally do by hand.
One thing I did do was to keep the notch really small. Initially on my last run, I thought I had pulled back too much (less than half of the circle), but I formatted 3 disks just fine.
I do have a "square hole punch" in my save for later Amazon cart, but I am thinking that might be overkill since this works.
Man, if I only had a 3D printer back in the day... ;-)
One thing I do need to watch out for is remembering which hole punch I intend to use. We have 2 in the house, and they are just slightly different designs. With my tolerances as close as they are, it only works with one of them.
Unrelated/related side story. I was going thru some old PC floppies (DSDD) earlier, and had one that I couldn't format, so thought it was just bad and threw it away. When I was testing the notcher guide, I decided to grab that floppy for some alignment tests. (It was just on the top of the trash in my office) Then I realized why it wouldn't format. It had NO write protect notch at at!!!! Not sure how I didn't noticed that before. ;-)