Surface Noise

[Audiofiligram]

Hi Trolls,

i´m a newbie in the cutting science, here is my problem :
i made a cut on a Polycarbonate blank and on a PVC blank with the same trackand have some issue about surface noise , This one is really
important about -24db .The average Track loudness @ -1 db RMS on both
cuts ,maybe someone could give some advice to reduce this noise.

Would be very nice !

Thanks

Audiofiligram

[fraggle]

you have to be more specific mate.
which one has more surface noize and what gear are you using?
are you using lamps?
cheers

[Audiofiligram]

Hi fraggle ,

thanks for taking time for answering , so I got
The Vinylium SC 99 Cuttting Head & Mechanik.
Platter is a SP 10. I don´t use lamps.

Polycarbonate and PVC got the same Noise Floor !

[JayDC]

are you applying stylus heating? I understand that when cutting acetates, stylus heating removes surface noise, and fixes the frequency drift problems that occur as the lathe moves more to the center of the blank.. Most likely will do the same for any material I would assume, the hardest part would be finding the correct temperature to heat the stylus for the different mediums..

[Audiofiligram]

I don´t use stylus heating ...
I got a diamond stylus without wire . maybe to fix 2 cable wire
to the stylus and plug this on a AC Current generator ?

[JayDC]

Stylus heating uses low voltage, about 6-12 volts AC current, you will need to find a suitable transformer to achieve this. You will not need more then 1A of current, but some sort of potentiometer is required to adjust the current to find the correct amount. A meter in this circuit will help you find and mark what current amounts work best for each media.

For the wire on the stylus, you can use nichrome wire at a gage of 36. You use dental cement to glue it to the diamond. You will want to coil the wire around the diamond about 7 1/2 turns, then glue it. You can find nichrome resistor wire on ebay for a reasonable cost.

Later, when its time for a new diamond, you may request that the heating wires are attached by the supplier. Having a spool of nichrome in your shop is worth it, since these wires tend to be fragile, and can sometimes break off.

You don't want to throw away a good (and expensive) diamond stylus just because 2cents worth of wire broke off.

Talk to a member named shank, for a good supply of diamond stylus..

Hope this helps..

[andybee]

better is DC generator, 5VDC, approx. 450mA (adjustable),
specs from adamant heating wire
should help a lot!

[Audiofiligram]

Thanks a lot , i´ll try this out ! What about heating lamp ? I also
thought about using an Red Light Lamp about 150 W..

Greetz

[JayDC]

I am not sure for poly, but for acetates a normal 100w incandescent light bulb works perfectly

[Audiofiligram]

What is the equivalent in milimeters for a gage of 36 ?

Cheerz

[JayDC]

it's .005 inches, or 0.127 millimetres

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220624385053

Here's a link, but the seller is in the USA

[Audiofiligram]

Thanks Trolls ,

you helped a lot I going to try this !

Cheers

Audiofiligram

[Audiofiligram]

Can somebody supply the build up with a photo ?

Would be very nice !

[andybee]

very small, you need a good camera (makro).
just wind the wire 5-10x arround the stylus.
and then fix it with a good glue (2K).
but, If you have noise, the stylus maybe is still broken (facets).
good luck!
Andreas

[maniman]

Try to cut with the surface from up 43 / 44 º C , as example in the VR the lamps are 40 and 60 W (40w the side 60w the up) ,

Examine carefully the stylus with at least 40 x , and search for defects on the tip.

Re-adjust the direction of the head / stylus , 9 of every 10 times that occurs me was stylus vertical bad adjustement (translated , horizontally one of the faces nearest to the blank than the other). (Not in the SC .... )

One time that occurs to me was be an overhead isn't geometrically well adjusted.

The one thing that works always for me , take a time looking the geometry of the entire system , and think what is ? what can be ? if is that you will find it. (Not in SC)

as Andreas said , maybe the stylus is broken , or maybe was be bad mounted for a time and was wearing in a strange manner ,

We run out of options , seems bad stylus.

That surface noise is in both channels ?

[Audiofiligram]

Noise is in both Channels .... tried lot of things
like you said !! Stylus is new so i don´t think it
s because of it !

Cheerz

[Audiofiligram]

Here is some Snapshot from The Stylus , seems not to
be broken ? maybe the black tip on the cutting edge has to be
removed to avoid th noise , what do you think ?

[Audiofiligram]

[maniman]

No no , seems right (maybe more augment needed) , about the black tip , really the other face is the interesting , this face is in the back of the cutting point if I not go wrong ( or this is different faced like the mine one )

I noticed when my stylus is black make strange noises , thats is totally true in my case , usually clean with an ear cleaning stick wet with a liquid , I don't know what exactly is the liquid used in the VR for that , maybe and advanced VR user (like MEGAMIKE or montalbano ) can answer that.

The other thing I noticed is the difference between that and the VR one , that shank its absolutely enormous compared with the stylus (and with the VR stylus) , that's the "standard" SC-99 Diamond Shank ? Interesting...

For all the other that stylus seems hundred times clean than the mine , will be very interesting see the other faces (sure that one is the cutting face ?)

Regards , Happy if can help.

[Audiofiligram]

Hey Maniman ,

thanks for your answer
i´ll post some other snapshot !!

I ´m still looking for Nichrome wire (gage36=0,127 mm)
I can´t find the right gage , could somebody sell
me some Wire ? I´m located in Germany ...

thx