sewing needles

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sifis1983
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sewing needles

Post: # 30399Unread post sifis1983
Wed Jun 11, 2014 1:15 pm

Hi!

Do you know if these sewing needles are suitable for cutting/embossing on polycarbonate plastic?
(the leather needles has triangular shape)
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Fela Borbone
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Re: sewing needles

Post: # 30404Unread post Fela Borbone
Thu Jun 12, 2014 11:47 am

Hello, I don't know all the sawing needless avalaible, but I think the point is not sharp enough(too big tip radius) And they bend easy when/if heated.
If you have a microscope or alike, have a look at a the point of a record player reproduction needle and the one you intend to use for recording. recordig stylii has to be sharper than repro.Hope trhis helps.

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Fela Borbone
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Re: sewing needles

Post: # 30405Unread post Fela Borbone
Thu Jun 12, 2014 11:50 am

Strongly reccommend to try this ones:
http://www.lathetrolls.com/viewtopic.php?f=15&t=4538

cheap and guaranteed that works!

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sifis1983
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Re: sewing needles

Post: # 30406Unread post sifis1983
Thu Jun 12, 2014 6:23 pm

Hi, I appreciate your reply..
I know that the cutting styli has to be sharper and with smaller radius than the repro stylus.

I'm asking this because I saw that lot of guys on youtube use sewing needles for their home made lathes. Unfortunately, I don't have any microscope to see the difference of the tip. (I hope I will buy one of those USB microscope next week to see the difference).

Anyway, where can I buy these Jerry's steel cone styli ? (ebay link doesn't work)

thanks in advance.

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Fela Borbone
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Re: sewing needles

Post: # 30407Unread post Fela Borbone
Thu Jun 12, 2014 8:19 pm

search in ebay for something like "record lathe stylus" (I've got no relation with the seller)

With a cheap USB microscope of 500X you can make photos like this:

reproducing stylus
Image
and sewing needle(the sharpest I could find,maybe from a sewing machine)
Image

My microscope was around 50 euros and came with very cool measuring software. but the stand was almost useless. I mounted it on a toy microscope and worked a lot better:
Image
Now Ive got a bigger one, but I still findin this very usefull sometimes

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sifis1983
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Re: sewing needles

Post: # 30410Unread post sifis1983
Fri Jun 13, 2014 8:31 am

Hi,

Well, these are very interesting pics. But, as I know even the sewing needles has numbers, that represents the size of the tip.
As you can see in my first pics, there are numbers. (3-7). Also, the needles for leather has triangular shape as I can see that with naked eye.

Anyway, thanks for your help. I will post some pics of the tip when I get this usb microscope. (I hope next week).

Cheers

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tragwag
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Re: sewing needles

Post: # 30411Unread post tragwag
Fri Jun 13, 2014 4:01 pm

A sewing needle off the shelf will never be as good a tool as something made for the purpose. Even if it works once, the standards for sewing needle tips are not nearly as closely monitored as cutting styli. Save a headache and buy proper styli.
making lathe cuts on a Presto 6N, HIFI stereo cuts on vinylrecorder
at Audio Geography Studios, Providence, RI USA
http://www.audiogeography.com

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sifis1983
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Re: sewing needles

Post: # 30413Unread post sifis1983
Sat Jun 14, 2014 5:10 am

Thanks for your reply.

Well, what do you mean about "proper styli"? Something like that?
(http://www.ebay.co.uk/itm/Record-lathe-cutter-presto-record-in-stylus-needle-styli-rek-o-kut-recorder-/281255271864?pt=LH_DefaultDomain_0&hash=item417c1eddb8)

Also, I 've seen some guys that can emboss with a old playback gramophone styli or sapphire styli. Are all the needles can match in any DIY cutterhead?

Thanks in advance.

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Snakeheadfishlab
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Re: sewing needles

Post: # 30414Unread post Snakeheadfishlab
Sat Jun 14, 2014 10:12 am

Buy that guys stylus's ,they work really good.i use the cones for embossing on my presto 8k and am getting great results!


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sifis1983
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Re: sewing needles

Post: # 30416Unread post sifis1983
Sat Jun 14, 2014 10:42 am

Yes, I beleive that there are great! But, I don't have any cutting mashine like Presto or Rekokut.. Just my DIY lathe and I don't know if I can use them on polycarbonate.

Ok, it's cheap enough to try them. :)

Do you use any heating coil on them ?

Cheers

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Snakeheadfishlab
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Re: sewing needles

Post: # 30448Unread post Snakeheadfishlab
Mon Jun 16, 2014 10:44 pm

Heat lamp 100-111 and ronsonol lighter fluid


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chaosbc
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Re: sewing needles

Post: # 30450Unread post chaosbc
Tue Jun 17, 2014 1:56 am

Celsius or Farenheit ?
------------------------------------------------------
http://www.flickr.com/photos/49941863@N04/sets/72157632396669506/

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Cubed
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Re: sewing needles

Post: # 30454Unread post Cubed
Tue Jun 17, 2014 3:20 pm

If I'm correct that's in Fahrenheit. I heard people heating up to 140 but I imagine ymmv.

I wouldn't heat a steel stylus for for fear of heating the head and possibly melting something. I was told the best to heat the materiel if your embossing.

Please correct me if I'm wrong.

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Snakeheadfishlab
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Re: sewing needles

Post: # 30474Unread post Snakeheadfishlab
Thu Jun 19, 2014 8:16 am

Yes Fahrenheit ,I heat my platter for 5 minutes and then put the disc on the platter and heat it.i start cutting at 100 degrees...


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Fela Borbone
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Re: sewing needles

Post: # 30476Unread post Fela Borbone
Thu Jun 19, 2014 10:40 am

I'd like to add that using sewing needles won't produce a standard goove, but maybe can reproduce some (lo lo lo-fi) sound, even if the repro stylus rides the botton of the groove instead of the walls. Can bring some inexpensive fun, but using a proper stylus is lot better.

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sifis1983
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Re: sewing needles

Post: # 30494Unread post sifis1983
Mon Jun 23, 2014 2:49 pm

Well, that's a pic that you can see the tip of my dusty reproducing needle and the one of my sewing needle.

As I can see there is a big difference in the tip... But is this sewing needle good enough to start experimenting?

P.S. that's a picture of 20x magnification (just got the usb microscope and that's my first try of the picture, I ll try a closer look later)

Thanks in advance.
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