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Mica Diaphragm Assistance
https://forum.talkingmachine.info/viewtopic.php?f=7&t=47086
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Author:  pellicano1 [ Sat Oct 10, 2020 7:54 am ]
Post subject:  Mica Diaphragm Assistance

I recently acquired some odd sized mica diaphragms. Is there a way to cut to size? If so what is the process without damaging the edges?

Thanks everyone!

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Author:  pellicano1 [ Mon Oct 12, 2020 2:29 pm ]
Post subject:  Re: Mica Diaphragm Assistance

Anyone??

Author:  soundgen [ Mon Oct 12, 2020 2:55 pm ]
Post subject:  Re: Mica Diaphragm Assistance

it's very difficult as mica is very hard in the flat plane but cleaves easily in the horizontal plane , but you can try using a compass ( Drawing tool ) by placing a steel needle in the "drawing" side and going round and round till you go through the entire mica it does work and the mica is OK to use even if the edge isn't perfect

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Author:  pellicano1 [ Mon Oct 12, 2020 3:35 pm ]
Post subject:  Re: Mica Diaphragm Assistance

soundgen wrote:
it's very difficult as mica is very hard in the flat plane but cleaves easily in the horizontal plane , but you can try using a compass ( Drawing tool ) by placing a steel needle in the "drawing" side and going round and round till you go through the entire mica it does work and the mica is OK to use even if the edge isn't perfect

Thanks for the info!!

Author:  CarlosV [ Tue Oct 13, 2020 8:21 am ]
Post subject:  Re: Mica Diaphragm Assistance

Soundgen's note reminded me that you can buy compasses fitted with blades. I have one I bought decades ago, it is Japanese and I used it to cut paper circles. The blade is replaceable and of high quality, so I would think it will be effective to cut mica, but I never tried to do so. You can find these if you look for origami tools.

Author:  soundgen [ Tue Oct 13, 2020 10:41 am ]
Post subject:  Re: Mica Diaphragm Assistance

CarlosV wrote:
Soundgen's note reminded me that you can buy compasses fitted with blades. I have one I bought decades ago, it is Japanese and I used it to cut paper circles. The blade is replaceable and of high quality, so I would think it will be effective to cut mica, but I never tried to do so. You can find these if you look for origami tools.


like this I guess , be great to know if it works on mica

https://www.graphicsdirect.co.uk/produc ... gI6uPD_BwE

Author:  Inigo [ Tue Oct 13, 2020 3:21 pm ]
Post subject:  Re: Mica Diaphragm Assistance

Oooops, reiterated!

Author:  Inigo [ Tue Oct 13, 2020 3:21 pm ]
Post subject:  Re: Mica Diaphragm Assistance

Mmm i don't like mica diaphragms with peeled borders... i like'em with perfect borders...
I thinnnnk they must clinnnnk clear as a bell when dropped on a hard surface by the edge, just 1" fall on the table from your fingertips... That reveals the sound it will have when reproducing. The higher and cleaner the clinnnnk , the better it will sound.
You can call me maniac! :D

Author:  Curt A [ Tue Oct 13, 2020 11:04 pm ]
Post subject:  Re: Mica Diaphragm Assistance

If you can find a compass similar to the one pictured by Soundgen, you can place an Exacto knife in it instead of a pen or pencil, which will definitely cut mica. Also, if you place the mica on a flat surface with a piece of double sided tape below, it will keep it from spinning when cutting. Covering the edges with Scotch tape before cutting may stop the edges from fraying during cutting. Some people have also used a compass to draw a new cutting line and then cut it with very sharp scissors and it supposedly works fine.

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