JVC M90 screws and switch cap

[Radio raheem]

T;hanks for catching that Rimmer, actually two of them are wrong. Should've known better
The left one on the middle row is for the three spots along the top edge of the back
The bottom screw goes in the other seven sites.

No worries Caution and yes you are correct Sir.....the only other screws that arn't original as you have confirmed is the small screw on the right out of the 4 screws ohh and the long screw on the left isn't original either....what one would give for a screw lol
so just to confirm the 2 centre screws are the original ones on pic 10

Floyd as far as i remember dude the 777 screws are totally different, great offer though, never had a vz2000 so can't confirm on that

 

[Trommelmops]

Little update:

Trommelmops isnt able to create the switchcaps :'-(

No possibility to make the needed cut for the shaft. No tool exist to made it. I have asked my complete network: They have all the same opinion:

Only with an injection mold. No stamp or punch or cutter or whatever you can imagine can made this cut. Only with wire cutting it goes. But this mashine is

rare here.....Noone knows who has one of this special tool. Only companys.....too expensive....

So from this point im very sorry but these caps i cant create . The other stuff is no prob....

Im sorry....

 

[Radio raheem]

Little update:

Trommelmops isnt able to create the switchcaps :'-(

No possibility to make the needed cut for the shaft. No tool exist to made it. I have asked my complete network: They have all the same opinion:

Only with an injection mold. No stamp or punch or cutter or whatever you can imagine can made this cut. Only with wire cutting it goes. But this mashine is

rare here.....Noone knows who has one of this special tool. Only companys.....too expensive....

So from this point im very sorry but these caps i cant create . The other stuff is no prob....

Im sorry....

Trammel mops....i know what the switch looks like but im not sure why you can't make it....there would only need to be a slit in the bottom of it (want a better word) the slit would just need to be vertical as far as i can tell my friend.no need for the other derection...could someone explain better to trammelmlops than me...thanks

 

[caution]

Can't you create a slot by drilling holes?
If you drill them just right, you'll end up with peaks that will bite into the shaft.

Here is what I would envision, for the big one at least.
The red would be the three drilled holes, but the rest would be filled in.
The blue outline is the shaft.

 

[Radio raheem]

that's just it, as far as i can see you only need the red part, forget the other direction....thanks caution

 

[Trommelmops]

Yes I know this kind of drilling.

I can test it. We have discussed this.

I can try it out for you. Maybee we have luck....but please think about the channels which the driller made.....when you drill one hole the next hole has no material at the jacket so the driller can't hold the position and goes to a wrong direction and mostly the little diameter cause the break of the tool.....but I can try it first....

The idea is old and we see what happend Thx for all good ideas....I like the commitment from all of you

 

[Trommelmops]

So dear mebers and followers,

in the meantime i had a little challenge: I want recreate the original casescrews for the M90. blue_fuz has send me pictures with the measurements.

It was really tricky but this is what i like. The needed pitch for the special shapeed thread is 1.75mm.....This is with my lathe no problem.

The real challenge is to grind the lathe tool......I have tryed some shapes.....And the next one was to make them with a thinner shaft than the thread.

And then all in one. Not single pieces. So the last is to make a needed driver for a ph1 or ph2 screwdriver......

This i have also solved. Looked at the pictures.....Need only a little fine tuning or fine "turning" and then blue_fuz gets the right screws with the correct measurements and the correct pitch for the M90......

Im a little proud that i have made these special screws.......

I make some trys tomorrow but then they fit perfect without to damage the cover posts......Only the head is a little different....

Look at the pictures: With some special tools i have enough fun here




You can see my first try with the thicker head and the second ones.......

 

[caution]

Incredible attention to detail, another master execution
Great work!

 

[MyOhMy]

To my tiny mind this is amazing stuff, absolutely amazing - well done!

 

[blu_fuz]

This is soooooooo awesome. Hand made parts from across the world! Thank you isn't enough!

 

[Trommelmops]

A little update

Today I have changed the shape and now im happy
with my day work.....

Tomorrow I make the last two screws and the driver......

 

[Brownlow]

Oh wow....!

This is great, really great progress.

 

[Trommelmops]

So a little update:

I forge tomorrow only the PH1 driver into the heads.......i have decided that this is big enough.....

Then i can send them to the other side of the globe togehter with the other screws......

By the way i have compared the exist screws and they have also the pitch from 1,75mm and 4mm diameter.........I correct only the lenght.....



And now i have ideas to create the switchcaps.....I inform you......I make some trys if it is possible ....

 

[caution]

Nice work! One question - when you determined the thread pitch, did you measure only one gap or did you measure many, and take the average?

I'm pretty sure the thread pitch is 1.65mm. Here is what ten gaps measured, and 1.75mm for comparison. Caliper is properly zeroed.

 

[Trommelmops]

Oh i have had the pictures from blue_fuz.......

And there was the value 1.73mm so i have decided to make them in pitch 1.75mm

1.65 is also possible without to know if my lathe is able to create this, could be a inch thread.

I have compared all knowned exist thread tables but have nowhere found this pitch, equal if inch or metric, the nearest is at the moment

1.75mm is only 1mm per 16,5mm difference.

But your pictures are very good to compare. I must think about it maybee i can change my changing gears.......Let me think about


And to your question: Is good to count 10 threads and measure it so like you did

And such a good caliper i got a very good TESA......

Let me see if i can do this too.....

Update:

i have calculate that when im cutting the thread with an 15g inch thread i have only a difference from only 0,75mm per 25,4mm ( 1")

this is i think the nearest value which is without problems easy to make.

 

[caution]

That's good news! I wanted to bring this up because if the pitch isn't dead on (or very close) you risk shearing off the plastic threads inside the hole if it's already been threaded with a different pitch.

 

[Trommelmops]

Oh I know this. That's the reason why we try to remake this like the original or as near as possible.....

Thanks for your commitment and with this info i can now make the right one's

 

[T-STER]

How does Mr Trommel even make something such as a screw look so good?

I'm sure i shouldn't look at a screw and think it looks awesome, but i do.

 

[Trommelmops]

 

[trippy1313]

The Mad Hatter is at it again! Wow Trommel, your magic is stunning. Beautiful work again.