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Re: Magnentic Scrolls tapes rescued

Posted: Sun Jul 02, 2017 7:12 pm
by Dave
ABS (case) melts at 105C. Nylon (spool) melts at 220C. Polyethylene terephthalate (tape) melts at 260C.

I think I'm good at 75C.

Re: Magnentic Scrolls tapes rescued

Posted: Sun Jul 02, 2017 10:08 pm
by Outsoft
Dave wrote:Here in Texas, close to the Gulf Coast, typical humidity is >65%. Some microdrives get kind of "lumpy" and don't turn smoothly - there are fluctuations in the friction. Also, the capstan sometimes slips and picks up magnetic material. I know this is what is happening as I can measure the amps drawn by the motor and the current increases and decreases.

It seems removing the moisture changes that behavior, at least for me with two cartridges. I was willing to sacrifice them. I often have to bake components to prevent them being dam,aged during reflow if their packaging has been open for more than a few hours, but I bake components at 75C or 95C, depending on the type of component.


I know this problem very well...here to solve we need to let it run (the md's) very often during the year ;)

Re: Magnentic Scrolls tapes rescued

Posted: Thu Oct 12, 2017 11:37 pm
by Cristian
dilwyn wrote:
Dave wrote:I did an experiment of putting a couple of dud microdrive cartridges in my reflow oven and set them to bake at 75C for 2 hrs.

Nice one,

Another option is to store the devices with silica gel. A generous quantity of silica gel.
In my country is possible to buy 5 kilos bags of cat litter made of pure silica gel for 2-3 euros ;)

Re: Magnentic Scrolls tapes rescued

Posted: Fri Oct 13, 2017 12:35 am
by Dave
Cristian wrote:In my country is possible to buy 5 kilos bags of cat litter made of pure silica gel for 2-3 euros ;)


Maybe you should spend less on cat litter and more on fixing your logo, which keeps rebooting but never reaches a prompt. It's, just, so WRONG! :P

*OCD*

Re: Magnentic Scrolls tapes rescued

Posted: Fri Oct 13, 2017 8:32 am
by NormanDunbar
Sounds like a hardware problem to me Dave! :D

Cheers,
Norm.

Re: Magnentic Scrolls tapes rescued

Posted: Fri Oct 13, 2017 8:41 pm
by Cristian
Dave wrote:
Cristian wrote:In my country is possible to buy 5 kilos bags of cat litter made of pure silica gel for 2-3 euros ;)


Maybe you should spend less on cat litter and more on fixing your logo, which keeps rebooting


OK so you made your nice kidding. Let's return in topic now.
I'm not so updated on exchange rates, anyway I can ensure that a one-time payment of 2-3 euros is very cheap. On the contrary energy (and time) is very expensive, so I prefer to preserve my devices with silica gel. Of course this is only my humble contribute to the preservation cause