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Author Topic: Restoration of a Lisa 1  (Read 1350 times)

snuci

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Re: Restoration of a Lisa 1
« Reply #45 on: May 19, 2020, 09:50:21 am »

Thanks again stepleton.  This morning I ran out and got some WD-40 Specialist Dirt & Dust Resistant Dry Lube PTFE spray and removed all the lube from the rails that I could as it did not make a difference.  I then took three videos.  One with my "good" Twiggy floppy drive as a reference and two videos of the "bad" Twiggy floppy drive both before and after lubing just the rear screw drive.  I think that did it!

Here are the videos.  Note that he floppy is bad and dies on formatting occasionally.  I can visibly see a track that was damaged but I have been using this continually for testing.  You will also note that my "bad" Twiggy floppy occasionally does work but it dies looking for calibration more often than it working.

The first thing I do is insert the floppy while using Blu.  I then try to format.  On the lubed video the format fails so I use the "disk clean" option to get the head moving.

Good Twiggy sounds:

http://vintagecomputer.ca/goodtwiggysounds/

Bad Twiggy Before lubing:

http://vintagecomputer.ca/badtwiggybeforelubing/

Bad Twiggy After Lubing:

http://vintagecomputer.ca/badtwiggyafterlubing/
« Last Edit: May 19, 2020, 09:53:22 am by snuci »
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stepleton

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Re: Restoration of a Lisa 1
« Reply #46 on: May 19, 2020, 03:25:52 pm »

I think my drives sound closer to your "bad" drive  :D

I'm still waiting for my Tri Flow---once it gets here I look forward to seeing if I get similar results.

Were you able to manually turn the lead screw in order to do the lubrication? I couldn't get mine to move, but was not going to try and force it.

Does your "bad" drive always fail at roughly the same spot of the format? I wonder if your drive has the same head pressure issues that mine has.
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snuci

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Re: Restoration of a Lisa 1
« Reply #47 on: May 19, 2020, 03:54:38 pm »

I think my drives sound closer to your "bad" drive  :D  I'm still waiting for my Tri Flow---once it gets here I look forward to seeing if I get similar results.

Were you able to manually turn the lead screw in order to do the lubrication? I couldn't get mine to move, but was not going to try and force it.

I think that will help.  No, you can't move that screw.  I just sprayed it and the first time it was used after spraying was what you heard in that video.  It sounded terrible before.  During the "disk cleaning" or Option N, it would squeak each time it went back and forth.  Now it is okay.

Does your "bad" drive always fail at roughly the same spot of the format? I wonder if your drive has the same head pressure issues that mine has.

No, it usually fails right in the beginning (95%) or a few tracks in. If I change that bad chip, it works fine with no issues.  As a matter of fact, my oldest Twiggy drive didn't have any foam pads for the extra pressure so I cut them myself and with two-sided tape, I put them into both spots on the upper frog arm (if that is the correct term).  I never tried without to be honest.  I had similar issues with single sided drives that have had the pressure pad missing from the arm above (and/or below in this case) as this adds the extra pressure needed for a good read.  I just replaced the foam out of habit during initial drive checks. Perhaps you might check if your pads are missing?

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snuci

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Re: Restoration of a Lisa 1
« Reply #48 on: May 30, 2020, 04:19:24 pm »

After the final IC came, I did some testing with the Lisa and all seems fine.  I have a couple of feet missing so it wobbles when I eject a disk in the video but otherwise it is 100% working and restored.

Here's a link to a quick YouTube video.

https://youtu.be/JlJvw4b7gMg
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rayarachelian

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Re: Restoration of a Lisa 1
« Reply #49 on: May 30, 2020, 08:38:32 pm »

After the final IC came, I did some testing with the Lisa and all seems fine.  I have a couple of feet missing so it wobbles when I eject a disk in the video but otherwise it is 100% working and restored.

Very nice!
I used these on both the front and the Lisa keyboard: https://www.amazon.com/gp/product/B01M8I6YLH/ - the base is the same though the shape is slightly different from actual Lisa rubber feet.

Here's a link to a quick YouTube video.

https://youtu.be/JlJvw4b7gMg

That video's very neat, mind if I steal some frames from it for a Lisa 1 skin for LisaEm?
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Fate whispers to the warrior, 'You can not withstand the storm.'  The warrior whispers back, 'I am the storm.'

snuci

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Re: Restoration of a Lisa 1
« Reply #50 on: May 31, 2020, 12:53:55 pm »

I used these on both the front and the Lisa keyboard: https://www.amazon.com/gp/product/B01M8I6YLH/ - the base is the same though the shape is slightly different from actual Lisa rubber feet.

Thanks Ray.  I'll look into these.

That video's very neat, mind if I steal some frames from it for a Lisa 1 skin for LisaEm?

Thanks.  You can use whatever you like.  I plan on taking some extra pictures.  If there is anything specific you need, let me know.

Santo
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rayarachelian

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Re: Restoration of a Lisa 1
« Reply #51 on: May 31, 2020, 09:36:09 pm »


That video's very neat, mind if I steal some frames from it for a Lisa 1 skin for LisaEm?

Thanks.  You can use whatever you like.  I plan on taking some extra pictures.  If there is anything specific you need, let me know.

Hi Santo,

Many thanks for agreeing,

Do you have a hires version of that video without the text overlay (I'm guessing yt will compress it down)? I could use the frames where you insert the FileWare media and later it ejects. The angle is perfect as a Lisa 1 skin, assuming I get LisaEm compatible with LOS 1.x that is.

Your hand holding and inserting the media and taking it away in both the upper and lower drives is perfect and will add realism. And I'll happily use any twiggy motor sounds vs the 400k drive ones.

I'd also need the power light turning on and off, I don't recall if that was in the video or not. (It's not enough to fake that by just lighting the power button square, because the glow of the powerlight illuminates the bottom of the Lisa when it's on.)
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Fate whispers to the warrior, 'You can not withstand the storm.'  The warrior whispers back, 'I am the storm.'

blusnowkitty

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Re: Restoration of a Lisa 1
« Reply #52 on: June 02, 2020, 09:57:06 am »

Congrats on the Lisa 1 restore! I hope I can be lucky enough to one day get a Lisa 1; I think it looks better than the 2 and it's just such a unique machine with those dual Twiggies.
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