Let's create the FSSK/FEXT = DONE !!!!

idollar · 24 Aug 2015, 21:59

I placed the plastic separation between the membranes on top and painted with pencil the contours.

: DSC_3290.jpg (500.26 KiB) Viewed 5275 times

I also placed the plastic foam on top and painted in red the holes

: DSC_3292.jpg (392.54 KiB) Viewed 5275 times

The details follow:

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: DSC_3291_02.jpg (163.58 KiB) Viewed 5275 times

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: DSC_3291_04.jpg (122.58 KiB) Viewed 5275 times

idollar · 24 Aug 2015, 22:01

My conclusions are:

1.- Some missing holes
2.- Some error in the printing. Small
3.- Some errors in the position of the holes. The error is bigger than the printing error.

I guess that I need to learn how to create the PCB file, if not, the process will take ages.
My problem again is that I am very busy at present.

idollar · 24 Aug 2015, 22:03

Regarding the errors comparison:

in this picture, if the border of the plastic is compared with the position of the hole, one can see that the displacement errors do not match

On the other hand, the hole error (red) is matching the printing error ... I cannot conclude if it is correct or not.

idollar · 24 Aug 2015, 22:11

I also conclude that for the prototypes, it is not recommendable to order the PCBs with the holes done.
One can always drill them with enough precision.

This will remove a potential failure mode. I many PCBs are required after the initial prototypes (I do not think that this will be the case) they could be added later.

Muirium · 24 Aug 2015, 22:38

Sterling work, i$. I'm in no rush anyway as my barrel frame is in America while my SSKs are all in Scotland! I'm many months away from getting things together even if I wanted.

wcass · 24 Aug 2015, 23:06

idollar wrote: ↑I also conclude that for the prototypes, it is not recommendable to order the PCBs with the holes done.One can always drill them with enough precision.

Sure, we can silkscreen where we think they should go.

Would you please try the paper template on the back plate to check for that hole above F1? I know that is not correct. I need to get closer as I want to use it for grounding.

Thanks

XMIT · 24 Aug 2015, 23:11

Sorry, it looks like idollar beat me to the punch here, as I was looking to print these out in the office. Ah well. Maybe I can be of help some other way.

Techno Trousers · 24 Aug 2015, 23:21

XMIT wrote:Sorry, it looks like idollar beat me to the punch here, as I was looking to print these out in the office. Ah well. Maybe I can be of help some other way.

If you're still willing, it might be worthwhile to make a second set of measurements just to double-check. Measure twice and drill once, you know...

idollar · 24 Aug 2015, 23:24

XMIT wrote: ↑Sorry, it looks like idollar beat me to the punch here, as I was looking to print these out in the office. Ah well. Maybe I can be of help some other way.

idollar · 24 Aug 2015, 23:47

wcass wrote: ↑
idollar wrote: ↑I also conclude that for the prototypes, it is not recommendable to order the PCBs with the holes done.One can always drill them with enough precision.
Sure, we can silkscreen where we think they should go.

Would you please try the paper template on the back plate to check for that hole above F1? I know that is not correct. I need to get closer as I want to use it for grounding.

Thanks

Alright: The following pictures are bad quality. The tripod is stored back. I was on my way to bed

I have placed the paper on the back of the metal plate. Looking down. Using the "pencil" technique that we all used when kids to copy coins I marked where the screws are. I then made holes with the top of the pencil to see where they were.
The results follow:

There is some lateral displacement:

: Photo 24-08-15 23 27 47.jpg (833.4 KiB) Viewed 5229 times

: Photo 24-08-15 23 28 04.jpg (886.84 KiB) Viewed 5229 times

: Photo 24-08-15 23 28 16.jpg (710.04 KiB) Viewed 5229 times

More details follow:

: Photo 24-08-15 23 36 10.jpg (1007.44 KiB) Viewed 5229 times

Notice the lateral displacement again. I have folded the paper and marked the fold with a dashed line

: Photo 24-08-15 23 36 10-small.jpg (658.54 KiB) Viewed 5229 times

: Photo 24-08-15 23 36 17-small.jpg (972.64 KiB) Viewed 5229 times

: Photo 24-08-15 23 36 22-small.jpg (832.68 KiB) Viewed 5229 times

idollar · 24 Aug 2015, 23:58

My updated conclussions:

1_ We need to ensure that the printout has no error
2_ It will be simpler if I work the file locally. I will PM you wcass

cinnamonrollz · 26 Aug 2015, 04:44

I only have fullsized model m's but I would be interested in one of the prototype pcb's. If they work, this would be an awesome design.

idollar · 26 Aug 2015, 12:06

cinnamonrollz wrote: ↑I only have fullsized model m's but I would be interested in one of the prototype pcb's. If they work, this would be an awesome design.

If the FSSK works, doing the FEMK (F Extended model M Keyboard) should be trivial.
The only issue, once more, are the F flippers that one need to source someone. But we will deal with this latter. One problem at a time is enough.

Muirium · 26 Aug 2015, 12:42

Too many acronyms!

Apparently, Unicomp still has spare SSK barrel frames in stock, after all these years. Those should all be the last revision of IBM's design, and a known starting point. Could be a good idea to prototype this mechanism with one of them.

chzel · 26 Aug 2015, 13:11

Shhh...not even Unicomp know they have them!

Muirium · 26 Aug 2015, 13:14

True, and yet we got two! Perhaps the lack of self awareness is why they still have any.

Vizir · 26 Aug 2015, 16:24

idollar wrote:
cinnamonrollz wrote: ↑I only have fullsized model m's but I would be interested in one of the prototype pcb's. If they work, this would be an awesome design.
If the FSSK works, doing the FEMK (F Extended model M Keyboard) should be trivial.
The only issue, once more, are the F flippers that one need to source someone. But we will deal with this latter. One problem at a time is enough.

You could source them from Ellipse's new F62/77 project.

idollar · 26 Aug 2015, 16:25

Vizir wrote: ↑ You could source them from Ellipse's new F62/77 project.

I know. This was my message between the lines.

Vizir · 26 Aug 2015, 16:26

idollar wrote:
Vizir wrote: ↑ You could source them from Ellipse's new F62/77 project.
I know. This was my message between the lines.

Ah, got it.

hammelgammler · 09 Sep 2015, 23:05

Any news with the project?
Oh yeah, do you plan a PCB with windows keys between CTRL and ALT? Or exactly the normal SSK layout?

idollar · 09 Sep 2015, 23:12

hammelgammler wrote: ↑Any news with the project?
Oh yeah, do you plan a PCB with windows keys between CTRL and ALT? Or exactly the normal SSK layout?

You have to be patience. I am busy at present.
The layout will be as the SSK layout. No changes

idollar · 11 Sep 2015, 21:07

Hello,

I spend some time today to model the holes in the FSSK.
The next step is to paint the pads.

I decided to make my own version so we can compare the two independently made pcbs at the end as a kind of quality control.

There is no logic with these holes. One has just to measure, print and correct. A nightmare.

I need to find some time to continue with this.

idollar · 12 Sep 2015, 12:46

In general the file works fine.
The extended model M has he holes in the same order. So I am thinking of creating a CAD file with one extra set of layers to cover the normal model M also:

: Photo 12-09-15 12 36 00.jpg (413.47 KiB) Viewed 5008 times

: Photo 12-09-15 12 34 52.jpg (399.37 KiB) Viewed 5008 times

I need to correct some errors. The holes are only there to avoid routing copper through this area. The plan is to order the PCB without the holes. But we better do things right from the beginning. This needs to be corrected:

: Photo 12-09-15 12 34 58.jpg (786.61 KiB) Viewed 5008 times

I hope to progress this during the weekend. Lets see if we have a full PCB by then.

vivalarevolución · 13 Sep 2015, 00:23

Great to see some progress. Not sure what you are thinking for the PCB fabricator, but I used PCBway for the XTant and I was happy with their pricing and quality.

idollar · 13 Sep 2015, 13:40

vivalarevolución wrote: ↑Great to see some progress. Not sure what you are thinking for the PCB fabricator, but I used PCBway for the XTant and I was happy with their pricing and quality.

Thanks for the tip. I will check it, for sure.

shreebles · 21 Sep 2015, 10:54

Nice! This is the single most promising keyboard project that I know of. Having tried your F, I can only imagine how awesome this could be...

Techno Trousers · 18 Nov 2015, 23:26

We may get some more traffic in this thread, idollar, since I linked it in Ellipse's 4704 revival thread (which is nearing completion). Do you have any updates on this project for us?

idollar · 23 Nov 2015, 15:06

jajaja

I have seen your post

I am taking Friday off. I will try to finalise the prototype of the PCB. It will then be a matter of ordering it. I have all the parts at home.

shreebles · 23 Nov 2015, 16:45

Wow! So you will build a complete, hopefully working prototype? Exciting!

vsev · 05 Dec 2015, 13:02

Nice to see this going further, I'm very interested in this project too !