Re: [CAD_CAM_EDM_DRO] Re: noob laser question

Its a specialised supply, from what I´ve read. Very special. They have
to be made for this use, and use very high voltages and sometimes high
currents. For small, hobby size applications a "neon transformer" in the
20 kV range is supposed to be useful, for more powerful ones the
voltages go up ... dangerous if mishandled and the design know-how is
less common.

Metal-cutting lasers start at 200 W I believe, again, from what I´ve
read, and what one Spanish oem told me (who sells them).
I believe the range for useful metal-cutting lasers starts at about
1500-2000 $ - there are several oem products form china now in the
marketplace, cnczone had quite a lot about them at some point.

How big is the disc ? How heavy ?
If the disc is not very heavy, I don´t think 30 k rpm is in any way
difficult for a turned disc on a lathe.
Standard, cheap, small bearings commonly allow these sorts of speeds. So
do ceramic ones that go to much higher rpm´s, and are not expensive in
small sizes. VBX on ebay will have some.

Do you need many, for production ?
If you started with flat ground stock, like from starret (is in the us),
I believe you would just need to turn the outer edge and you would be
*very* close. Another option would be to have it precision ground ...
for a small disc, already turned, the grinding should be cheap and easy.

Another matter is if´s heavy (like a flywheel that stores energy) -
these can be very dangerous due to the amount of energy and the
catastrophic failure potential. If it fails, its literally a bomb as the
energy has nowhere to go.

Depending on your needs, you might be able to get one from a failed gyro
in an airplane. It might be cheap, if you can find one, and its not in
use any more, as they are then worthless. The current ones are very
expen$ive. They have excellent bearings.
Oh, and for gyro use, a vibrator is commonly used to make them more
sensitive. Kind of like a mechanical buzzer in the case, by creating a
"buzz" it makes the gyro more sensitive. Like tapping a mechanical dial.
About 200 hz iirc ...

Cristi wrote:

>
> Found 20 Watt, 40 Watt and 80 Watt "CO2 10600nm Laser for OEM
> application" on ebay - are they powerful enough? Don't have the
> smallest clue about the power required. Prices go from US $195.00 to
> US $799.00 for 80 Watt. What supply should I use for these lasers?
>
> --
>