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Re: Oops, my obsession with computers from my childhood strikes again!
Posted: 07 Sep 2021 10:20
by PhilC
@rubber_jonnie that's cool, I'll give it all a go hopefully this evening after I've fixed the Apple
Re: Oops, my obsession with computers from my childhood strikes again!
Posted: 07 Sep 2021 10:21
by rubber_jonnie
PhilC wrote: 07 Sep 2021 10:20
@rubber_jonnie that's cool, I'll give it all a go hopefully this evening after I've fixed the Apple
Splendid!
Re: Oops, my obsession with computers from my childhood strikes again!
Posted: 07 Sep 2021 10:32
by rubber_jonnie
@PhilC Don't forget to do the RIFAs!!
Re: Oops, my obsession with computers from my childhood strikes again!
Posted: 07 Sep 2021 10:36
by PhilC
rubber_jonnie wrote: 07 Sep 2021 10:32
@PhilC Don't forget to do the RIFAs!!
Its first on my list. Just sorting out what replacements I already have in stock.
Re: Oops, my obsession with computers from my childhood strikes again!
Posted: 07 Sep 2021 10:40
by rubber_jonnie
PhilC wrote: 07 Sep 2021 10:36
rubber_jonnie wrote: 07 Sep 2021 10:32
@PhilC Don't forget to do the RIFAs!!
Its first on my list. Just sorting out what replacements I already have in stock.
Cool. Mine were severely cracked so glad I got them done in time after what I shall refer to as 'The BBC Incident'........
Re: Oops, my obsession with computers from my childhood strikes again!
Posted: 07 Sep 2021 13:53
by rubber_jonnie
Lunchtime tinker with the Seltron FDD and I videoed the drive during a catalog operation.
The video lasted 6 seconds, during which time the disk drive hub rotated 7.5 times (I counted!)
So there's an issue right there, the drive speed should be around 300RPM, but based on my 6 second video, the actual RPM is 75!! This ties in with the diags I ran, so pulling the drive belt, which seemed ok tension wise and it is quite hard, dry and slippery, almost leathery. No surprises there then, though I had hoped it would be ok.
I did run a speed test using one of the diag disks I have, and that came back really weird. I think I understand why.
I'll get some ordered, thankfully the size is printed on the belt which will help considerably. In the meantime I can lube the spindles to see if I can improve things there.
Of the other diags, the write protect switch is good, but of course I can run the others as they rely on the disk being driven.
EDIT: Belt ordered.
Re: Oops, my obsession with computers from my childhood strikes again!
Posted: 08 Sep 2021 10:54
by rubber_jonnie
What a dimbo, I forgot to check where the belt was coming from and it's China, delivery expected by the end of the month!!
So found a UK source that can be here by the end of the week. The Chinese one can go in my parts bin for spare.
For reference these are the belt dimensions:
Diameter: 92mm
Folded length: 144mm
Circumference: 288mm
Width: 3.5-4mm
Re: Oops, my obsession with computers from my childhood strikes again!
Posted: 09 Sep 2021 14:20
by rubber_jonnie
Oops, I may have just bought this:
Disk_][.jpg
:girldance:
Re: Oops, my obsession with computers from my childhood strikes again!
Posted: 09 Sep 2021 15:11
by stephen_usher
Hehehe. How on Earth did that happen?!
Re: Oops, my obsession with computers from my childhood strikes again!
Posted: 09 Sep 2021 15:21
by rubber_jonnie
stephen_usher wrote: 09 Sep 2021 15:11
Hehehe. How on Earth did that happen?!
It just did ok! I'm sure it was an accident.....