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Oh, that might explain it. I used the first one. And got 5 of them. At 10$ a piece. 😐

I don't know enough about 3D printing to know what the problem is. Not sure if they used the wrong material, wrong method, or something else. Color is good, because that means I'm more likely to spot it when it has to come off for the monthly cleaning of the ROM SIMM for some weird reason...

I had a local place build 5 of them. There is a chance they may have made some error, but from what I have they're all too big. Because 3D printing produces a lot of ridges that have to be sanded smooth, and the part is difficult to make smooth on the many sides and pockets it has, it's not...

Well, nobody can prove it either way right now, so we can just say the jury's out.

Asked Chuck(G) on VCF, he merely said they look different for a start...but did not elaborate further. A relatively thorough search of other places provided no useful information. I'd have to go full researcher mode and try to dig up patents and dredge what is left of the internet.

Fixed, thanks. Added two new images and two other links.

Could ask the guy who made modern replicas.

This makes me wonder if we can make software TechStep equivalent.

True, true. Thanks for the reminder. I may elect to put that in there, I'm not sure yet, since I didn't make a list of what each one can open. Not a bad point though... Anything else you found interesting?

Get some 99% alcohol and a soft toothbrush and clean up the whole motherboard, both sides. You'll probably go through at least a litre, so pick up 2L. Recap the power supply and motherboard. If you hear a breaking glass sound, it's usually a memory problem. Check the memory in something...

I don't have an answer for the heads. I'll ask someone. Maybe they are the same? I don't know. I can't prove it. But so much as writing HD onto a DD disk kinda sorta works, until it doesn't, using the different heads could also work.

There is a significant difference between the density with HD and DD media. From Herb's page (reminds me a lot of my writing: stuff tacked on top of stuff, repeated ad infinitum): 3.5 inch drives, 720K (1MB) and 1.44M (2MB) and 2.88M (4MB) (Earliest drives were Sony, single-sided. Most...

There is little proof that the 800K and 1.44 drive heads are the same. The write currents are different, DD uses a different magnetic media than HD does, and the track density is much smaller on HD diskettes. Although I couldn't find it here, I'm almost certain the heads have to be different...

No.

Oh yeah, it's one of the first things I do when I get a machine. The reason I can tell is when formats a disk, or reads certain disks, it gets progressively "worse". For example I was doing a test the other day to format a 1.44MB ProDOS disk, and it got more and more "bad sectors" as it got...

Happy to help. Thinking about it, we need a wizard of a programmer to figure out how to directly access the floppy drive. I'm not sure if that's possible, I poked around technical manuals but not Inside Macintosh to see if such an operation is possible. If it is, we could use some kind of a...

Yes. Check the Working with Disk Images section, in the "More information" heading.

I got sent down a deep rabbit hole trying to dig up information on floppy disk alignment, which is probably about time since my SE/30's internal FDD isn't acting right. In doing so a bunch of information was added to the Working with Disk Images section, and like as before, you'll probably find...

The zero track sensor is probably the best lead to follow. I haven't been able to find any resources for diagnostic purposes for Macs, as all the stuff is primarily designed for 5.25" disks. There is a chance a wizard of a programmer can make up a new program designed to work with the 128K...

Well I appreciate you starting this thread as you sent me down a rabbit hole of looking at this issue. Looks bleak because nobody makes floppy alignment disks anymore, and I can't blame them. Even finding one is difficult because if people bought one, they bought it for a 5.25" or 8" drive...