Monthly Reminder, please read: Subject lines: Remember to change the subject line if you are straying from the original thread. Please change the subject line...
High everyone, I've just joined your group even though I've been cruising this site for a while. I'm a member over at cnczone (great site) and I started a...
Anyone knows where to order an UV Collimator? I'm working to replace the mill on a CNC Milling Machine with a .0254mm UV beam, on presensitivized PCB. Cristian...
G'day I haven't tried it myself but I one saw reference to using the eggcrate
diffuser for flourescent lights and painting it matt black to eliminate...
A high resolution projector is 1024x768. At 6x4, that is about 180ppi, give or take. As a comparison, most find that for toner transfer a 600dpi laser printer...
I gather that you're using the CNC table to move a board under a UV source, much like a Gerber plotter. Years ago this was called 'direct imaging.' The...
laser beams are almost perfectly columinated. You just have to control dot size. The simplest technique would be to use a pinhole just a bit smaller than the...
Hi, I'm fabricating my own vacuum chamber right now. I'm using a pressure cooker and 2 venturi pumps (PneuAire) connected to a ordinary shop air compressor....
I didn't get the start of this thread so I'm getting in late. I take it that the object is to make some custom connectors. I do this routinely to make...
Grant. Light bulbs contain inert gas at atmospheric pressure. Vacuum tubes (thermionic valves) contain? a vacuum. This is why the glass is so much thicker than...
In a message dated 5/5/2005 4:32:33 P.M. Eastern Daylight Time, stefan_trethan@... writes: And most importantly: remember vacuum chanber failures are...
Are there other dangers besides sound waves? I can easily protect against that, I have high-quality ear protectors used at the firing range. If a chamber...
Ok, so an exterior testing session is warranted and no dangerous operations must be done while the contraption is on. I can find a sand pit and put the ...
... I did not know one could pull a vacuum of more than one athmosphere ;-) On which planet (or under how much water) do you need to be to do this? Implosions...
The 30 Hg is the height in inches of a column of mercury supported by the vacuum (980 millimeters, for you metric buffs, , IIRC) - NOT the weight in pounds....
I want to collimate a 30 degree UV Led Array made by Nichia. Steve <alienrelics@...> wrote:I think he means he wants to collimate a UV laser beam. Steve...
... I was of the impression that it was at somewhat lower than atmospheric pressure, otherwise you wouldn't get that "pop" when they break. ... As close as...
On Fri, 6 May 2005 14:57:54 -0400, Roy J. Tellason ... It is lower than athm., put a propane torch against it and the softening glass will be pulled in. (yes i...
... It takes a certain technique to work with glass and have it not shatter. I found that out the hard way back when I was into messing around with chemistry...
Hi Group, I am wondering if there is a such a device already out there that can print directly onto a circuit board. I see essentially two uses for such a...
... B/W tv's used 15Kv or so accelerating voltage - created soft x-rays. Color sets needed more energetic electrons for the color phosphors, so used ~23Kv,...
... Even that's a little high, 12KV was more common. ... 25KV was more common, and in the earlier tube stuff the shunt-type regulator tube would age, and...
