I agree with threeneurons that cuts down to that distance apart are going to be iffy.
I know that there are companies that laser cut solder stencils with machines like I have, though, they might be using a different laser head than the one I cut with. So, Dalibor, I'll contact you offline with my address, but I already have some rather thin stainless sheet that I can try to cut with. I don't know if it will work, but it's worth a shot. Otherwise, is there anybody out there familiar with chemical etching stainless? Michael- On 01/28/2013 06:22 PM, threeneurons wrote: > I use to work closely with the laser people. Use to cut stainless (316 > & 304) down to around 0.010" (0,25mm). Should be able to do 0,1mm > thick, but cuts 0,4mm (0.016") apart, is going to be iffy. > > > On Monday, January 28, 2013 4:09:44 AM UTC-8, Dalibor wrote: > > Hi Michael, > > the numbers for nixi tubes is one of the problem I havent > sufficiently solved yet. Are your laser cutters able to produce > numbers that have 0.4mm wide lines? The material would be 0.1mm > thick stainless steel sheet (316L). > > I could send You some sheets to give it a try, just send me your > address ;-) > > Thank You! > > Dalibor > > 2013/1/27 michael gregg <mgregg...@gmail.com <javascript:>> > > Sounds good. And yes, other people that have made nixie tubes > do seem > to be getting good results with the level of vacuum that you are > getting. > > Also, I have all sorts of crazy laser cutters here. I may be > able to > come up with a good stack of numbers or other characters if > you'd like > them for your nixie tubes. I have never cut anything so fine with > these lasers, but according to the manufacturer, I should be > able to > do it. > > I am not sure where I would get tiny ceramic separators though. > > I am excited to see your results. > > Michael- > > > On Sat, Jan 26, 2013 at 6:14 AM, jb-electronics > <webm...@jb-electronics.de <javascript:>> wrote: > > Hi Michael, > > > > yes, I will document everything on my website. In fact, most > of it is > > already done, but right now I am writing the vacuum system > part and I want > > to document all the steps that I did until now. And now it > is far from > > perfect. So I will show all different setups and number > them. My current > > setup is setup number III. > > > > It won't be long ;-) > > > > Jens > > > > > >> On 01/25/2013 03:52 PM, jb-electronics wrote: > >>> > >>> Hi folks, > >>> > >>> I am still working on Nixie tubes, but I have to take it a > little slow > >>> at the moment because I switched my university and I am > currently sort > >>> of living in two cities ;-) > >>> > >>> However, today I had some time so I took a look at my > vacuum system. > >>> My problem was that even after I closed the valve to my > pump at a > >>> pressure of 1.5E-2 mbar, the pressure would rise up to > 20mbar in 20 > >>> minutes. So there was a leak. > >>> > >>> I then checked every part of my system (swagelok adapter, > needle > >>> valve) by replacing them with a blind flange and recording the > >>> pressure after 10s, 20s, 30s, 40s, 50s, 60s, 120s, 300s, > 600s, 1200s > >>> and plotted them. I realised that there was insufficient > greasing on > >>> my needle valve, and the most interesting thing is that it > is not > >>> airtight if the scale is adjusted to just zero. You have > to (gently) > >>> adjust it below the scale zero point. Then I get a leakage > rate of > >>> just 1.2 琨ar/s which is very low. > >>> > >>> My system has a volume of at most (!) 65ml, so the leakage > rate now is > >>> Q = 5.4E-6 mbar l/s which is pretty good I think. See my > results here: > >>> > >>> http://www.jb-electronics.de/tmp/leakage.png > <http://www.jb-electronics.de/tmp/leakage.png> > >>> http://www.jb-electronics.de/tmp/leakage_extensive.png > <http://www.jb-electronics.de/tmp/leakage_extensive.png> > >>> > >>> Note that the Q value in these diagrams needs to be > multiplied with 65ml. > >>> > >>> The next step will be to find a good connection to the > pressure > >>> reducer for my gas bottle. Right now I am using a PVC hose > (terrible), > >>> and I have huge leakage rates. > >>> > >>> But as always: One thing at a time ;-) > >>> > >>> Jens > >>> > >> Very cool. > >> > >> So the leakage rate seems pretty low, but I'd be concerned > about the > >> total vacuum that your system can accomplish. > >> > >> Although I have never built nixie tubes myself, I did a > good amount of > >> research to go down that road. > >> > >> My research came up with some claims that you need to get > down in the > >> 10E-6 torr before the fill for good results with a nixie tube. > >> > >> Anyhow, please keep a image journal of your work. It looks > like a great > >> deal of fun. > >> > >> Michael- > >> > > > > -- > > You received this message because you are subscribed to the > Google Groups > > "neonixie-l" group. > > To unsubscribe from this group and stop receiving emails > from it, send an > > email to neonixie-l+...@googlegroups.com <javascript:>. > > To post to this group, send an email to > neoni...@googlegroups.com <javascript:>. > > For more options, visit > https://groups.google.com/groups/opt_out > <https://groups.google.com/groups/opt_out>. > > > > > > -- > You received this message because you are subscribed to the > Google Groups "neonixie-l" group. > To post to this group, send an email to > neoni...@googlegroups.com <javascript:>. > To unsubscribe from this group, send email to > neonixie-l+...@googlegroups.com <javascript:>. > For more options, visit > https://groups.google.com/groups/opt_out > <https://groups.google.com/groups/opt_out>. > > > > > > -- > Dalibor Farny > http://dalibor.farny.cz > > -- > You received this message because you are subscribed to the Google > Groups "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send > an email to neonixie-l+unsubscr...@googlegroups.com. > To post to this group, send an email to neonixie-l@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msg/neonixie-l/-/dEZnYg_BWLkJ. > For more options, visit https://groups.google.com/groups/opt_out. > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. 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